WO2014061370A1 - 超音波診断装置及び画像表示方法 - Google Patents
超音波診断装置及び画像表示方法 Download PDFInfo
- Publication number
- WO2014061370A1 WO2014061370A1 PCT/JP2013/074271 JP2013074271W WO2014061370A1 WO 2014061370 A1 WO2014061370 A1 WO 2014061370A1 JP 2013074271 W JP2013074271 W JP 2013074271W WO 2014061370 A1 WO2014061370 A1 WO 2014061370A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- time variation
- unit
- elasticity information
- elasticity
- Prior art date
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/485—Diagnostic techniques involving measuring strain or elastic properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5207—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of raw data to produce diagnostic data, e.g. for generating an image
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
- A61B8/5223—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for extracting a diagnostic or physiological parameter from medical diagnostic data
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/60—Editing figures and text; Combining figures or text
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/30—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indices; for individual health risk assessment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10132—Ultrasound image
Definitions
- the present invention relates to an ultrasonic diagnostic apparatus and an image display method for displaying a tomographic image in a subject using ultrasonic waves.
- the ultrasonic diagnostic apparatus transmits ultrasonic waves to the inside of the subject using an ultrasonic probe, receives an ultrasonic reflected echo signal corresponding to the structure of the living tissue from the inside of the subject, and obtains a tomographic image in the subject. Configure and display.
- the strain of the tissue at the tomographic site of the subject is obtained, and an elastic image at the tomographic site is generated based on the strain and displayed on the display device, and a plurality of regions of interest are displayed on the tomographic image or elastic image displayed on the display device.
- the elasticity information in each region of interest is converted into an index value, and the index value is displayed on a display device (see Patent Document 1).
- Patent Document 1 it is possible to quantitatively evaluate the hardness of a living tissue at a diagnostic site.
- the index value of the calculated elasticity information depends on the operator's setting. Further, the operator cannot confirm whether or not the measurement is performed by setting the region of interest at a stable measurement position.
- an object of the present invention is to provide an ultrasonic diagnostic apparatus and an image display method capable of displaying a time variation image based on time variation of elasticity information.
- a tomographic image configuration unit that configures a tomographic image of a diagnostic region of a subject via an ultrasound probe, an elasticity information calculation unit that calculates elasticity information indicating hardness, and the elasticity
- the ultrasonic diagnostic apparatus comprising: an elasticity image constituting unit that constitutes an elasticity image based on the elasticity information calculated by the information computing unit; and an image display unit that displays the tomographic image and the elasticity image.
- a time variation analysis unit that analyzes time variation at each measurement point from the elasticity information calculated by the calculation unit, and a time variation image configuration that forms a time variation image based on the time variation analyzed by the time variation analysis unit
- the image display unit displays the time variation image.
- the step of analyzing the time variation at each measurement point from the elasticity information indicating the hardness the step of configuring the time variation image based on the time variation, Displaying a time variation image.
- the block diagram which illustrates the composition of the ultrasonic diagnostic equipment of the present invention The block diagram which illustrates the composition of the time variation analysis part of the present invention.
- the figure which illustrates the display form of the image display part of this invention The figure which illustrates the display form of the image display part of this invention.
- the block diagram which illustrates the composition of the ultrasonic diagnostic equipment of the present invention The figure which illustrates the display form of the image display part of this invention.
- FIG. 1 is a block diagram illustrating an ultrasonic diagnostic apparatus according to the first embodiment of the present invention.
- the ultrasonic diagnostic apparatus according to the present embodiment includes an ultrasonic probe 12 used in contact with the subject 10, and a time interval between the subject 10 and the ultrasonic probe 12.
- a transmitter 14 that repeatedly transmits ultrasonic waves, a receiver 20 that receives time-series reflected echo signals generated from the subject 10, and an ultrasonic transmission / reception controller 18 that controls the transmitter 14 and the receiver 20 And phasing and addition of the received reflected echoes to generate RF signal frame data in time series, and a tomographic image is constructed based on the RF signal frame data generated by the phasing addition unit 22
- the displacement measurement unit 32 that measures the displacement of the living tissue of the subject 10 using the frame data
- the elasticity information calculation unit 34 that obtains the elasticity information from the displacement measured by the displacement measurement unit 32
- the elasticity information calculation unit 34 An elastic image composing unit 36 that configures an
- the ultrasonic probe 12 is formed by arranging a plurality of transducers, and transmits / receives ultrasonic waves to / from the object 10 in contact with the subject 10 via the transducers.
- the transmission unit 14 generates a transmission pulse for driving the ultrasonic probe 12 to generate an ultrasonic wave, sets a convergence point of the transmitted ultrasonic wave to a certain depth, and Ultrasonic waves are repeatedly transmitted to the subject 10 via the child 12 at time intervals.
- the receiving unit 20 receives a time-series reflected echo signal generated from the subject 10 via the ultrasonic probe 12, and amplifies the received reflected echo signal with a predetermined gain to generate an RF signal (received signal). It has the function to generate.
- the ultrasonic transmission / reception control unit 18 controls the transmission unit 14 and the reception unit 20 to transmit / receive ultrasonic waves to / from the subject 10 via the ultrasonic probe 12.
- the phasing addition unit 22 performs phasing addition of the reflected echo signals received by the reception unit 20. At that time, the phasing addition unit 22 inputs the RF signal amplified by the reception unit 20 and performs phase control, and forms an ultrasonic beam at one point or a plurality of convergence points to form an RF signal which is ultrasonic tomographic data. Generate frame data in time series.
- the tomographic image construction unit 24 inputs the data of the tomographic part of the subject 10, specifically the RF signal frame data from the phasing addition unit 22, and performs gain correction, log compression, detection, contour enhancement, filter processing, etc. Signal processing is performed to construct tomographic image data (for example, a black and white grayscale tomographic image of the subject 10).
- the tomographic image construction unit 24 includes an A / D converter that converts tomographic image data into a digital signal, a frame memory that stores a plurality of converted tomographic image data in time series, and a control controller. It is comprised including.
- the tomographic image data in the subject 10 stored in the frame memory is acquired as one image, and the acquired tomographic image data is read out in synchronization with the television.
- the RF signal frame data selection unit 30 stores the RF signal frame data output from the phasing addition unit 22, and selects at least two (a set) of RF signal frame data from the stored RF signal frame data group .
- the RF signal frame data selection unit 30 sequentially stores the RF signal frame data generated based on the time series from the phasing addition unit 22, that is, based on the frame rate of the image, and the stored RF signal frame data (N) Is selected as the first data, and at the same time, one RF signal frame data (N-1, N-2, N-3. Select X).
- N, M, and X are index numbers given to the RF signal frame data, and are natural numbers.
- the displacement measuring unit 32 measures the displacement of the living tissue of the subject 10. Specifically, the displacement measuring unit 32 is one-dimensional or two-dimensional from one set of data selected by the RF signal frame data selecting unit 30, that is, RF signal frame data (N) and RF signal frame data (X). Correlation processing is performed to obtain a vector indicating displacement in the living tissue corresponding to each measurement point of the tomographic image, that is, a one-dimensional or two-dimensional displacement distribution related to the direction and magnitude of the displacement.
- a block matching method or a phase gradient method is used for detecting the vector.
- an image is divided into blocks each consisting of N ⁇ N pixels, for example, focusing on blocks in a predetermined area (for example, a parameter acquisition area described later), and closest to the block of interest in the current frame.
- the current block is searched from the previous frame, and referring to this, predictive coding, that is, processing for determining the sample value by the difference is performed. Thereby, the displacement of each measurement point of the tomographic image is obtained and the vector is detected.
- the phase gradient method the movement amount of the wave is calculated from the phase information of the wave of the received signal, the displacement of each measurement point of the tomographic image is obtained, and the vector is detected.
- a pressure measurement unit (not shown) is used to measure the stress at the measurement point inside the subject 10 based on the pressure detected by a pressure sensor or the like provided between the ultrasonic transmission / reception surface of the ultrasonic probe 12 and the subject 10. Measure.
- the elasticity information calculation unit 34 obtains tissue strain or elastic modulus at the tomographic site based on the ultrasonic tomographic data of the tomographic site of the subject 10.
- the elasticity information calculation unit 34 is based on displacement information of the living tissue measured by the displacement measurement unit 32 using the RF signal frame data selected by the RF signal frame data selection unit 30, for example, a movement vector.
- the strain and elastic modulus of the living tissue corresponding to each measurement point on the tomographic image are calculated.
- the elasticity information calculation unit 34 also takes into account the pressure value output from the pressure measurement unit.
- the strain data is calculated by spatially differentiating the movement amount of the living tissue, for example, the displacement.
- the Young's modulus is a ratio of a simple tensile stress applied to the object and a strain generated in parallel with the tension.
- the elasticity image constructing unit 36 constructs an elasticity image at the tomographic site based on the elasticity information obtained by the elasticity information calculating unit 34.
- the elastic image construction unit 36 includes a frame memory and an image processing unit, stores elastic frame data in the frame memory, and performs image processing on the stored frame data.
- the elastic image construction unit 36 has a function of adding hue information to the elastic frame data, and based on the elastic frame data, the three primary colors of light are red (R), green (G), and blue (B ) Is converted into image data.
- the elasticity image construction unit 36 converts elasticity data having a large strain into a red code, and converts elasticity data having a small strain into a blue code.
- the time variation analysis unit 50 analyzes the time variation at each measurement point (each pixel) from the elasticity information calculated by the elasticity information calculation unit 34.
- the time variation analysis unit 50 analyzes the time variation at each measurement point from a plurality of frames of elasticity information, and calculates a measurement point whose time variation is larger than the threshold value.
- Measurement points with large time variations are measurement points where the elasticity information index value is not stable (varies) between multiple elasticity information frames, and cannot be measured with the elasticity information index value. is there.
- the index value of elasticity information is a value indexed by a ratio of elasticity information, a difference in elasticity information, and the like.
- the time variation image configuration unit 52 configures a time variation image indicating the degree of time variation based on the time variation analyzed by the time variation analysis unit 50.
- the time variation image forming unit 52 configures a time variation image for a measurement point having a time variation greater than a threshold, and does not configure a time variation image for a measurement point having a time variation smaller than the threshold.
- the image composition unit 26 includes a frame memory, an image processing unit, and an image selection unit.
- the image composition unit 26 is a composite image of a tomographic image and an elastic image, a tomographic image, and a time by a method represented by ⁇ blending. Create a composite image of the variation image.
- the frame memory stores tomographic image data from the tomographic image construction unit 24, elastic image data from the elastic image construction unit 36, and time variation image data from the time variation image construction unit 52.
- the image processing unit combines the tomographic image data stored in the frame memory and the elasticity image data by changing the combining ratio, and combines the tomographic image data stored in the frame memory with the time variation image data. Change and synthesize.
- the luminance information and the hue information of each pixel of the synthesized image are obtained by adding each information of the synthesized image at the synthesis ratio.
- the image selection unit selects an image to be displayed from the tomographic image data, elasticity image data, time variation image data, and composite image data of the image processing unit in the frame memory, and causes the image display unit 28 to display the selected image.
- the image composition unit 26 is controlled by the control unit 42 based on the image display conditions and the like set via the operation unit 40.
- the operation unit 40 includes operation devices such as a mouse, a keyboard, a trackball, a touch pen, and a joystick, and can set image display conditions and the like.
- the image display unit 28 displays images such as a tomographic image, an elasticity image, and a time variation image selected by the image selection unit of the image composition unit 26.
- the time variation analysis unit 50 includes an elasticity information frame storage unit 60 that stores a plurality of frames of elasticity information, and a time variation calculation unit 62 that calculates time variations from the plurality of frames of elasticity information.
- the elasticity information calculation unit 34 obtains the elasticity information of the tissue strain or the elastic modulus at each measurement point of the tomographic part for each frame based on the ultrasonic tomographic data of the tomographic part of the subject 10.
- the elasticity information frame storage unit 60 stores a plurality of elasticity information frames output from the elasticity information calculation unit 34, for example, 10 frames of elasticity information. The number of frames stored in the elastic information frame storage unit 60 can be arbitrarily set via the operation unit 40.
- the number of frames stored in the elastic information frame storage unit 60 can be set in accordance with the compression cycle of the ultrasonic probe 12. If the compression period of the ultrasound probe 12 is set, the elasticity information frame storage unit 60 stores a frame of elasticity information for one compression period.
- the number of frames stored in the elastic information frame storage unit 60 can be set in accordance with the irradiation time of the ultrasonic radiation pressure. If the time is matched with the irradiation time of the ultrasonic radiation pressure, the elasticity information frame storage unit 60 stores a frame of elasticity information during the irradiation of the ultrasonic radiation pressure.
- the image display unit 28 displays a composite image of a tomographic image and an elasticity image.
- the image display unit 28 may display only the tomographic image.
- the hardened tissue 74 that is the hardness information in the elastic image is superimposed on the tumor tissue 72 in the tomographic image. Is displayed. Assuming that the tumor tissue 72 is displayed in black and the hardened tissue 74 is displayed in blue, the portion where the tumor tissue 72 and the hardened tissue 74 overlap is displayed in deep blue. The operator can observe that the portion displayed in deep blue may be a malignant tumor.
- the operator uses the operation unit 40 to set the region of interest 80 in the region including the tumor tissue 72.
- a measurement point 82 is set at each measurement point (X1 to Xn, Y1 to Yn) in the combined image of the tomographic image and the elasticity image.
- n is a natural number.
- the region of interest 80 is a region that the operator pays attention to, and is a region to be compared with the ratio of elasticity information.
- the region of interest 80 set by the operation unit 40 can be made to correspond to a plurality of elastic information frames stored in the elastic information frame storage unit 60. That is, the coordinates of the region of interest 80 set by the operation unit 40 can be made to correspond to the coordinates of a plurality of elasticity information frames stored in the elasticity information frame storage unit 60. Therefore, a region of interest is set at the same position in a plurality of frames of elasticity information.
- the time variation calculating unit 62 associates the region of interest 80 set in the combined image of the tomographic image and the elastic image with a plurality of elastic information frames stored in the elastic information frame storage unit 60. Then, the time variation calculating unit 62 calculates the index value of the elasticity information at the region of interest 80 and each measurement point 82 set in the combined image of the tomographic image and the elasticity image in a plurality of elasticity information frames.
- the elastic information ratio will be described as an example of the elasticity information index value.
- the time variation calculator 62 calculates the time variation at each measurement point based on the ratio of the elasticity information.
- the image display unit 28 can also display the change over time in the ratio of elasticity information at each measurement point in a graph.
- strain which is elastic information.
- the distortion of the region of interest 80 is ⁇ 1
- the distortion of the measurement point 82 is ⁇ 2
- Strain epsilon 2 strain epsilon 1 and the measurement point 82 of the region of interest 80 is the average value of strain in each region.
- the time variation calculating unit 62 calculates a distortion ratio ⁇ 2 / ⁇ 1 ( ⁇ ratio ).
- the image display unit 28 displays the distortion ratio ⁇ 2 / ⁇ 1 calculated by the time variation calculation unit 62 with time.
- distortion of elastic information has been described as an example, parameters such as displacement, elastic modulus, and viscosity may be used.
- the time variation calculation unit 62 calculates the variation in the index value (elastic information ratio) of the elasticity information at each measurement point in a plurality of elasticity information frames.
- the time variation calculating unit 62 calculates the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information at each measurement point in a plurality of elasticity information frames.
- the time variation calculating unit 62 calculates that the time variation is large when the difference D1 between the upper limit value and the lower limit value of the ratio of the elasticity information is larger than a predetermined threshold value Th1.
- the time variation calculation unit 62 calculates that the time variation is small when the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information is smaller than a predetermined threshold value Th1.
- the difference D1 between the upper limit value and the lower limit value of the elasticity information ratio is smaller than a predetermined threshold Th1, and the variation in the elasticity information ratio is small.
- the time variation calculation unit 62 calculates the measurement point (X1, Y1) as a measurement point with small time variation.
- the difference D1 between the upper limit value and the lower limit value of the elasticity information ratio is larger than a predetermined threshold Th1, and the variation in the elasticity information ratio is large.
- the time variation calculating unit 62 calculates the measurement point (X2, Y2) as a measurement point having a large time variation.
- the time variation calculation unit 62 determines the difference between the upper limit value and the lower limit value of the ratio of elasticity information at each measurement point (X1 to Xn, Y1 to Yn) of the combined image of the tomographic image and the elasticity image.
- the threshold value Th1 is compared to calculate the variation in the ratio of elasticity information at each measurement point.
- the time variation calculator 62 calculates the time variation using the difference between the upper limit value and the lower limit value of the ratio of elasticity information at each measurement point. Can also be obtained.
- time variation calculation unit 62 can substitute for dispersion, coefficient of variation, and the like.
- the time variation calculation unit 62 calculates time variation based on the magnitude of the variance of the elasticity information, or calculates time variation based on the magnitude of the coefficient of variation of the elasticity information.
- the time variation image configuration unit 52 displays a time variation image 86 indicating that the time variation is larger than the threshold value for a measurement point where the time variation analyzed by the time variation analysis unit 50 is larger than the threshold value. Constitute. Specifically, the time variation image forming unit 52 configures the time variation image 86 based on the time variation display bar 84 identified for the measurement point where the time variation is larger than the threshold value.
- the time variation display bar 84 is set so that a time variation image is displayed for measurement points having a large time variation.
- the time variation display bar 84 is set to display a time variation image when the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information is larger than a predetermined threshold value Th1, and the elasticity information ratio When the difference D1 between the upper limit value and the lower limit value is smaller than a predetermined threshold Th1, the time variation image is set not to be displayed.
- the time variation image configuration unit 52 configures a time variation image and displays it on the image display unit 28.
- the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information is smaller than a predetermined threshold value Th1, no time variation image is formed.
- the image display unit 28 displays a composite image of a tomographic image and a time variation image.
- the operator can recognize that the region where the time variation image is displayed is a region with time variation.
- the image display unit 28 displays a composite image of a tomographic image and an elasticity image.
- the operator sets the region of interest 90 using the operation unit 40.
- the region of interest 90 is set, in the combined image of the tomographic image and the elastic image, in addition to the normal tissue 70 and the tumor tissue 72 that are the morphology information in the tomographic image, the hardened tissue 74 that is the hardness information in the elastic image is the tomographic image. Are superimposed on the tumor tissue 72.
- ⁇ Measurement points 82 are set at the respective measurement points (Xa to Xm, Ya to Ym) in the region of interest 90 of the composite image of the tomographic image and the elasticity image.
- a and m are natural numbers, and a ⁇ m.
- the time variation calculation unit 62 calculates elasticity information in the set region of interest 90 and the measurement point 82 in the plurality of elasticity information frames stored in the elasticity information frame storage unit 60.
- the time variation calculator 62 calculates the time variation at each measurement point based on the displacement of the elasticity information.
- the image display unit 28 can also display the displacement of the elastic information in a graph at each measurement point.
- strain which is elastic information.
- the distortion at the measurement point 82 is ⁇ 3 .
- the image display unit 28, the distortion epsilon 3 calculated by the time variation calculation unit 62 are displayed with time.
- distortion of elastic information has been described as an example, parameters such as displacement, elastic modulus, and viscosity may be used.
- the time variation calculation unit 62 calculates the variation in elasticity information at each measurement point in a plurality of elasticity information frames.
- the time variation calculating unit 62 calculates the displacement D2 of the elasticity information at each measurement point in a plurality of elasticity information frames.
- the time variation calculating unit 62 calculates that the time variation is large when the displacement D2 of the elasticity information is larger than a predetermined threshold Th2.
- the time variation calculation unit 62 calculates that the time variation is small when the displacement D2 of the elasticity information is smaller than a predetermined threshold Th2.
- the displacement D2 of the elastic information is smaller than a predetermined threshold Th2, and the variation of the elastic information is small.
- the time variation calculation unit 62 calculates the measurement point (X3, Y3) as a measurement point with small time variation.
- the displacement D2 of the elasticity information is larger than the predetermined threshold value Th2, and the variation of the elasticity information is large.
- the time variation calculating unit 62 calculates the measurement point (X4, Y4) as a measurement point having a large time variation.
- the time variation calculation unit 62 compares the displacement of the elasticity information at each measurement point (Xa to Xm, Ya to Ym) of the region of interest 90 that is the display area of the elasticity image with the predetermined threshold Th2. Thus, the variation of the elasticity information at each measurement point is calculated.
- the time variation image forming unit 52 configures a time variation image 96 indicating that the time variation is large for the measurement points analyzed by the time variation analyzing unit 50.
- the display area 92 for displaying the time variation image 96 is the same area as the region of interest 90 displayed as the elastic image display area.
- the time variation image construction unit 52 constructs a time variation image 96 based on the time variation display bar 94 identified for the measurement points having a large time variation.
- the time variation display bar 94 is set so that a time variation image is displayed for measurement points having a large time variation.
- the image display unit 28 displays a composite image of a tomographic image and a time variation image.
- the operator can recognize that the region where the time variation image is displayed is a region with time variation.
- the elasticity information is stored in the plurality of elasticity information frames stored in the elasticity information frame storage unit 60.
- the calculating unit 34 can calculate the index value of the elasticity information outside the area where the time variation image is displayed. Therefore, if the operator sets the region of interest for calculating the index value of elasticity information other than the area where the time variation image is displayed, the operator can calculate the index value of elasticity information without being affected by the time variation. It can be carried out. That is, the index value of elasticity information can be calculated at a stable measurement position.
- the control unit 42 issues an alarm for re-shooting.
- the image is displayed on the image display unit 28.
- the control unit 42 regards that the elastic image is stable, and the elastic information calculation unit 34 calculates the index value of the elastic information.
- the time variation image constructing unit 52 can construct a time variation image at the time of re-shooting and display the updated time variation image on the image display unit 28.
- the image display unit 28 displays a composite image of the tomographic image formed by the tomographic image configuration unit 24 and the elastic image based on the strain or elastic modulus formed by the elastic image configuration unit 36.
- (S102) Select whether to calculate the index value of the elasticity information at a predetermined measurement position on the combined image of the tomographic image and the elasticity image.
- the process proceeds to S104.
- the process ends.
- the region of interest 80 is set using the operation unit 40.
- the region of interest 90 may be set as the elastic image display region.
- the time variation analysis unit 50 calculates the index value or displacement of the elasticity information in the set region of interest and measurement point in a plurality of elasticity information frames. Then, the index value or displacement of the elasticity information is compared with a predetermined threshold value, and the variation of the elasticity information at each measurement point is calculated.
- the time variation image constructing unit 52 constructs time variation images 86 and 96 indicating that the time variation is large at the measurement points analyzed by the time variation analyzing unit 50.
- the operator sets a region of interest for calculating the index value of the elasticity information in addition to the area where the time variation image is displayed, and the elasticity information calculation unit 34 calculates the index value of the elasticity information.
- the region of interest for calculating the index value of elasticity information can be automatically set in addition to the region where the time variation image is displayed.
- the control unit 42 recognizes the region where the time variation image is displayed, and sets the region of interest in addition to the region where the time variation image is displayed.
- the control unit 42 sets a first region of interest in the hardened tissue 74 that is hardness information in the elastic image other than the region in which the time variation image is displayed, and the hardened tissue 74 is in a region other than the region in which the time variation image is displayed.
- Set the second region of interest in addition to.
- the elasticity information calculation unit 34 in a plurality of elasticity information frames stored in the elasticity information frame storage unit 60, index values of elasticity information in the first region of interest and the second region of interest set by the control unit 42 ( For example, the ratio of elasticity information) is calculated.
- the index value of the elasticity information calculated by the elasticity information calculation unit 34 is displayed on the image display unit 28 via the image synthesis unit 26.
- the first region of interest and the second region of interest are set in advance via the operation unit 40, and the time variation image formed by the time variation image configuration unit 52 is the first region of interest and the second region of interest. If the region overlaps, the elasticity information calculation unit 34 does not calculate the index value of the elasticity information in the first region of interest and the second region of interest.
- the control unit 42 causes the image display unit 28 to display an alarm for reshooting.
- the elasticity information calculation unit 34 performs elasticity information in the first region of interest and the second region of interest.
- the index value of is calculated.
- the index value of the elasticity information calculated by the elasticity information calculation unit 34 is displayed on the image display unit 28 via the image synthesis unit 26.
- the tomographic image configuration unit 24 that configures the tomographic image of the diagnostic region of the subject via the ultrasound probe 12, and the elastic information calculation unit 34 that calculates the elastic information indicating the hardness.
- an ultrasonic diagnostic apparatus comprising: an elasticity image construction unit 36 that configures an elasticity image based on elasticity information calculated by the elasticity information calculation unit 34; and an image display unit 28 that displays a tomographic image and an elasticity image.
- a time variation analysis unit 50 that analyzes time variation at each measurement point from the elasticity information calculated by the elasticity information calculation unit 34, and a time variation that constitutes a time variation image based on the time variation analyzed by the time variation analysis unit
- An image construction unit 52, and the image display unit 28 displays a time variation image.
- the index value of the elasticity information can be calculated at a stable measurement position other than the area where the time variation image is displayed. That is, it is possible to calculate the index value of elasticity information at a stable measurement position without depending on the operator.
- the time variation calculation unit 62 of the time variation analysis unit 50 in the plurality of elasticity information frames, the index value (elasticity information) of the elasticity information at each measurement point. Variation of the ratio of
- the difference D1 between the upper limit value and the lower limit value of the elasticity information ratio is larger than a predetermined threshold value Th1, and the variation in the elasticity information ratio is large.
- the time variation calculation unit 62 calculates the measurement point (X2, Y2) as a measurement point having a large time variation, but the time period from the time t1 to the time t2 is stable.
- the stable time zone from time t1 to time t2 is a time zone in which the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information is smaller than a predetermined threshold value Th1.
- the time zone 110 from time t1 to time t2 includes a time zone in which the difference D1 between the upper limit value and the lower limit value of the ratio of elasticity information is smaller than a predetermined threshold value Th1. That is, the time zone 110 from time t1 to time t2 can be regarded as a stable time zone. Therefore, the calculation time setting unit 100 selects a stable time zone from time t1 to time t2, and sets a stable time zone 110 from time t1 to time t2 as the calculation time of the calculation time setting unit 100. .
- the image display unit 28 displays a stable time zone 110 from time t1 to time t2.
- the elasticity information calculation unit 34 calculates the index value of the elasticity information in the time zone 110 from time t1 to time t2 set by the calculation time setting unit 100. It is also possible to select a plurality of frames from the time period from the time t1 to the time t2 and calculate the index value of the elasticity information in the selected frame 112.
- the image display unit 28 displays the selected frame 112.
- the elasticity information calculation unit 34 can calculate the index value of the elasticity information according to the number of frames if the number of frames selected in the time period from the time t1 to the time t2 is determined in advance. For example, if the number of frames is set to 10, 10 frames are selected in the time period from time t1 to time t2, and the elasticity information calculation unit 34 calculates the index value of elasticity information from the selected 10 frames. Can do.
- the present embodiment it is possible to calculate the index value of elasticity information in a stable measurement position other than the area where the time variation image is displayed and in a stable time zone. That is, it is possible to calculate the index value of elasticity information at a stable measurement position without depending on the operator.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Veterinary Medicine (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Physiology (AREA)
- Quality & Reliability (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Epidemiology (AREA)
- Primary Health Care (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
図1は、本発明の第1の実施形態の超音波診断装置を例示するブロック図である。
図1に示すように、本実施形態に係る超音波診断装置は、被検体10に当接させて用いる超音波探触子12と、超音波探触子12を介して被検体10に時間間隔をおいて超音波を繰り返し送信する送信部14と、被検体10から発生する時系列の反射エコー信号を受信する受信部20と、送信部14と受信部20を制御する超音波送受信制御部18と、受信された反射エコーを整相加算してRF信号フレームデータを時系列に生成する整相加算部22と、整相加算部22で生成されたRF信号フレームデータに基づいて断層画像を構成する断層画像構成部24と、断層画像と他の画像、数値情報などを合成する画像合成部26と、画像合成部26から出力される画像を表示する画像表示部28と、少なくとも2枚のRF信号フレームデータを選択するRF信号フレームデータ選択部30と、選択されたRF信号フレームデータを用いて被検体10の生体組織の変位を計測する変位計測部32と、変位計測部32で計測された変位から弾性情報を求める弾性情報演算部34と、弾性情報演算部34で演算した弾性情報から弾性画像を構成する弾性画像構成部36と、操作者が操作するための操作部40と、操作部40の操作に応じて各構成要素を制御する制御部42と、弾性情報演算部34で演算した弾性情報から時間ばらつきを解析する時間ばらつき解析部50と、時間ばらつき解析部50で解析された時間ばらつきに基づいて時間ばらつき画像を構成する時間ばらつき画像構成部52とを備えている。図1で示す破線は、超音波診断装置の本体を示すものである。
(S100)画像表示部28は、断層画像構成部24によって構成された断層画像と、弾性画像構成部36によって構成されたた歪み又は弾性率に基づく弾性画像の合成画像を表示する。
第2の実施形態について、図6、7を用いて説明する。第1の実施形態と異なる点は、図6に示すように、弾性情報演算部34における弾性情報の指標値の演算を行う演算時間を設定する演算時間設定部100を備える点である。
Claims (14)
- 超音波探触子を介して被検体の診断部位の断層画像を構成する断層画像構成部と、硬さを示す弾性情報を演算する弾性情報演算部と、前記弾性情報演算部において演算された前記弾性情報に基づいて弾性画像を構成する弾性画像構成部と、前記断層画像と前記弾性画像を表示する画像表示部とを備えた超音波診断装置において、
前記弾性情報演算部で演算された前記弾性情報から各計測点における時間ばらつきを解析する時間ばらつき解析部と、前記時間ばらつき解析部で解析された時間ばらつきに基づいて、時間ばらつき画像を構成する時間ばらつき画像構成部とを備え、前記画像表示部は前記時間ばらつき画像を表示することを特徴とする超音波診断装置。 - 前記時間ばらつき画像構成部は、前記時間ばらつきが閾値より大きい計測点については前記時間ばらつき画像を構成し、前記時間ばらつきが閾値より小さい計測点については前記時間ばらつき画像を構成しないことを特徴とする請求項1記載の超音波診断装置。
- 前記時間ばらつき解析部は、複数の弾性情報のフレームを記憶する弾性情報フレーム記憶部と、複数の弾性情報のフレームから時間ばらつきを算出する時間ばらつき算出部を有していることを特徴とする請求項1記載の超音波診断装置。
- 前記時間ばらつき算出部は、弾性情報の比、差、標準偏差、分散、変動係数のいずれか1つを用いて前記時間ばらつきを算出することを特徴とする請求項3記載の超音波診断装置。
- 前記時間ばらつき算出部は、前記複数の弾性情報のフレームにおいて、前記断層画像と前記弾性画像の合成画像に設定された関心領域と各計測点における弾性情報の指標値を演算し、各計測点における弾性情報の指標値のばらつきを算出することを特徴とする請求項3記載の超音波診断装置。
- 前記時間ばらつき算出部は、前記複数の弾性情報のフレームにおいて、各計測点における弾性情報の比の上限値と下限値の差を算出し、前記弾性情報の比の上限値と下限値の差が予め定められた閾値より大きい場合、時間ばらつきが大きいと算出することを特徴とする請求項3記載の超音波診断装置。
- 前記時間ばらつき画像構成部は、前記弾性情報の比の上限値と下限値の差が予め定められた閾値より大きい場合、前記時間ばらつき画像を構成して前記画像表示部に表示させることを特徴とする請求項3記載の超音波診断装置。
- 前記時間ばらつき算出部は、前記弾性情報の変位が予め定められた閾値より大きい場合、時間ばらつきが大きいと算出することを特徴とする請求項3記載の超音波診断装置。
- 前記画像表示部は、前記断層画像と前記時間ばらつき画像の合成画像を表示することを特徴とする請求項1記載の超音波診断装置。
- 前記時間ばらつき画像が所定領域以上である場合、撮影し直すアラームを前記画像表示部に表示させる制御部を備えることを特徴とする請求項1記載の超音波診断装置。
- 前記時間ばらつき画像が表示された領域を認識し、前記時間ばらつき画像が表示された領域以外に関心領域を設定する制御部を備えることを特徴とする請求項1記載の超音波診断装置。
- 第1の関心領域と第2の関心領域を予め設定しておき、前記時間ばらつき画像構成部によって構成された前記時間ばらつき画像が前記第1の関心領域と前記第2の関心領域に重なる場合、前記弾性情報演算部によって前記第1の関心領域と前記第2の関心領域における弾性情報の指標値を演算しないことを特徴とする請求項1記載の超音波診断装置。
- 前記弾性情報演算部における前記弾性情報の指標値の演算を行う演算時間を設定する演算時間設定部を備えることを特徴とする請求項1記載の超音波診断装置。
- 断層画像と弾性画像を表示する画像表示方法において、
硬さを示す弾性情報から各計測点における時間ばらつきを解析し、
時間ばらつきに基づいて、時間ばらつき画像を構成し、
前記時間ばらつき画像を表示することを特徴とする画像表示方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014541993A JP6358954B2 (ja) | 2012-10-18 | 2013-09-09 | 超音波診断装置 |
EP13847624.7A EP2910191A4 (en) | 2012-10-18 | 2013-09-09 | ULTRASONIC DIAGNOSTIC DEVICE AND IMAGE DISPLAY METHOD |
US14/435,551 US9311704B2 (en) | 2012-10-18 | 2013-09-09 | Ultrasonic diagnosis apparatus and image display method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012230488 | 2012-10-18 | ||
JP2012-230488 | 2012-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014061370A1 true WO2014061370A1 (ja) | 2014-04-24 |
Family
ID=50487947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/074271 WO2014061370A1 (ja) | 2012-10-18 | 2013-09-09 | 超音波診断装置及び画像表示方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9311704B2 (ja) |
EP (1) | EP2910191A4 (ja) |
JP (1) | JP6358954B2 (ja) |
WO (1) | WO2014061370A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106456108A (zh) | 2015-08-10 | 2017-02-22 | 深圳迈瑞生物医疗电子股份有限公司 | 超声弹性成像系统和方法 |
US11270480B2 (en) * | 2015-09-10 | 2022-03-08 | Landmark Graphics Corporation | Method for N-dimensional detection of spatial, temporal and gravimetric attributes and associated variation in plots, digital objects and photographs |
KR102569444B1 (ko) * | 2015-12-01 | 2023-08-22 | 삼성메디슨 주식회사 | 초음파를 이용하여 이미지를 획득하는 방법 및 장치 |
EP3488788A4 (en) * | 2016-07-19 | 2020-04-08 | Olympus Corporation | ULTRASONIC MONITORING DEVICE, OPERATING METHOD OF THE ULTRASONIC MONITORING DEVICE AND OPERATING PROGRAM OF THE ULTRASONIC MONITORING DEVICE |
US11138723B2 (en) * | 2016-07-22 | 2021-10-05 | Canon Medical Systems Corporation | Analyzing apparatus and analyzing method |
CN118000784A (zh) * | 2016-08-01 | 2024-05-10 | 深圳迈瑞生物医疗电子股份有限公司 | 剪切波弹性成像测量显示方法及系统 |
JP6861414B2 (ja) * | 2017-03-31 | 2021-04-21 | 国立大学法人 東京大学 | 解析マップ作成装置およびプログラム |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004105615A1 (ja) * | 2003-05-30 | 2004-12-09 | Hitachi Medical Corporation | 超音波探触子及び超音波弾性画像撮影装置 |
WO2006013916A1 (ja) | 2004-08-05 | 2006-02-09 | Hitachi Medical Corporation | 弾性像表示方法及び超音波診断装置 |
WO2006068079A1 (ja) * | 2004-12-24 | 2006-06-29 | Matsushita Electric Industrial Co., Ltd. | 超音波診断装置 |
JP2007312958A (ja) * | 2006-05-25 | 2007-12-06 | Hitachi Medical Corp | 超音波診断装置 |
WO2009072292A1 (ja) * | 2007-12-05 | 2009-06-11 | Panasonic Corporation | 超音波診断装置 |
JP2010099292A (ja) * | 2008-10-24 | 2010-05-06 | Ge Medical Systems Global Technology Co Llc | 超音波診断装置 |
WO2011010626A1 (ja) * | 2009-07-24 | 2011-01-27 | 株式会社 日立メディコ | 超音波診断装置、弾性画像の保存/再生方法、及び弾性画像の保存/再生プログラム |
WO2011102401A1 (ja) * | 2010-02-17 | 2011-08-25 | 株式会社 日立メディコ | 弾性画像の画質評価方法及び超音波診断装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6558324B1 (en) * | 2000-11-22 | 2003-05-06 | Siemens Medical Solutions, Inc., Usa | System and method for strain image display |
WO2006106852A1 (ja) * | 2005-03-30 | 2006-10-12 | Hitachi Medical Corporation | 超音波診断装置 |
WO2006129545A1 (ja) * | 2005-05-30 | 2006-12-07 | Tohoku University | 超音波診断装置 |
JP5260602B2 (ja) * | 2010-06-11 | 2013-08-14 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | 超音波診断装置 |
WO2012014739A1 (ja) * | 2010-07-27 | 2012-02-02 | 株式会社 日立メディコ | 超音波診断装置 |
US20130158900A1 (en) * | 2010-08-31 | 2013-06-20 | Hitachi Medical Corporation | Ultrasonic diagnostic apparatus and evaluation calculation method |
EP2620102A4 (en) * | 2010-09-21 | 2016-12-07 | Hitachi Ltd | ULTRASONIC DIAGNOSIS DEVICE AND METHOD FOR DISPLAYING ULTRASONIC IMAGES |
JP6222811B2 (ja) * | 2012-06-05 | 2017-11-01 | 東芝メディカルシステムズ株式会社 | 超音波診断装置及び画像処理装置 |
-
2013
- 2013-09-09 WO PCT/JP2013/074271 patent/WO2014061370A1/ja active Application Filing
- 2013-09-09 JP JP2014541993A patent/JP6358954B2/ja active Active
- 2013-09-09 EP EP13847624.7A patent/EP2910191A4/en not_active Withdrawn
- 2013-09-09 US US14/435,551 patent/US9311704B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004105615A1 (ja) * | 2003-05-30 | 2004-12-09 | Hitachi Medical Corporation | 超音波探触子及び超音波弾性画像撮影装置 |
WO2006013916A1 (ja) | 2004-08-05 | 2006-02-09 | Hitachi Medical Corporation | 弾性像表示方法及び超音波診断装置 |
WO2006068079A1 (ja) * | 2004-12-24 | 2006-06-29 | Matsushita Electric Industrial Co., Ltd. | 超音波診断装置 |
JP2007312958A (ja) * | 2006-05-25 | 2007-12-06 | Hitachi Medical Corp | 超音波診断装置 |
WO2009072292A1 (ja) * | 2007-12-05 | 2009-06-11 | Panasonic Corporation | 超音波診断装置 |
JP2010099292A (ja) * | 2008-10-24 | 2010-05-06 | Ge Medical Systems Global Technology Co Llc | 超音波診断装置 |
WO2011010626A1 (ja) * | 2009-07-24 | 2011-01-27 | 株式会社 日立メディコ | 超音波診断装置、弾性画像の保存/再生方法、及び弾性画像の保存/再生プログラム |
WO2011102401A1 (ja) * | 2010-02-17 | 2011-08-25 | 株式会社 日立メディコ | 弾性画像の画質評価方法及び超音波診断装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2910191A4 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2014061370A1 (ja) | 2016-09-05 |
US9311704B2 (en) | 2016-04-12 |
EP2910191A4 (en) | 2016-06-29 |
EP2910191A1 (en) | 2015-08-26 |
US20150279025A1 (en) | 2015-10-01 |
JP6358954B2 (ja) | 2018-07-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6358954B2 (ja) | 超音波診断装置 | |
JP5479353B2 (ja) | 超音波診断装置 | |
US8968200B2 (en) | Ultrasonic elastography for cross sectional tissue measurement method and apparatus | |
JP5689073B2 (ja) | 超音波診断装置、及び3次元弾性比算出方法 | |
JP4455003B2 (ja) | 超音波診断装置 | |
JP4657106B2 (ja) | 超音波診断装置 | |
US8734353B2 (en) | Ultrasonic diagnostic apparatus and elastic image display method | |
US9247922B2 (en) | Ultrasonic diagnostic apparatus and ultrasonic image display method | |
JP5726081B2 (ja) | 超音波診断装置及び弾性画像の分類プログラム | |
EP2620103B1 (en) | Ultrasound diagnostic equipment and ultrasound image display method | |
JP6228928B2 (ja) | 超音波診断装置及び弾性解析方法 | |
JP5455592B2 (ja) | 超音波診断装置、及び超音波画像表示方法 | |
JP2010012311A (ja) | 超音波診断装置 | |
JP4889540B2 (ja) | 超音波診断装置 | |
JP5789599B2 (ja) | 超音波診断装置 | |
JP5623609B2 (ja) | 超音波診断装置 | |
JP6230801B2 (ja) | 超音波撮像装置及び超音波画像表示方法 | |
WO2014002778A1 (ja) | 超音波診断装置及び超音波表示方法 | |
JP2006212166A (ja) | 超音波診断装置 | |
JP2014033814A (ja) | 超音波診断装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13847624 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014541993 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14435551 Country of ref document: US Ref document number: 2013847624 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |