CN111150418B - Data acquisition synchronization device - Google Patents
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- CN111150418B CN111150418B CN201911418766.0A CN201911418766A CN111150418B CN 111150418 B CN111150418 B CN 111150418B CN 201911418766 A CN201911418766 A CN 201911418766A CN 111150418 B CN111150418 B CN 111150418B
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- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
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- A61B6/5258—Devices using data or image processing specially adapted for radiation diagnosis involving detection or reduction of artifacts or noise
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- A61B6/545—Control of apparatus or devices for radiation diagnosis involving automatic set-up of acquisition parameters
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Abstract
The application relates to a data acquisition synchronization device, through setting up the X-ray detection part that is connected with every data acquisition module electricity, realize when the relative CT imaging device's of data acquisition module support casing removes, can receive the X-ray that X-ray tube sent, and when X-ray detection part received the intensity of X-ray reaches the preset intensity threshold value, to data acquisition module sends synchronous signal, so that data acquisition module basis synchronous signal carries out data acquisition work. The data acquisition synchronization equipment provided by the application enables a plurality of data acquisition modules to simultaneously receive the synchronization signals and simultaneously start to execute data acquisition work, and avoids annular artifacts generated due to different moments when the plurality of data acquisition modules start to execute the data acquisition work when the CT imaging equipment is used for imaging.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to data acquisition synchronization equipment.
Background
CT imaging devices, i.e. electronic computed tomography devices.
The CT imaging equipment generally rotates synchronously by an X-ray tube and a detector array which are oppositely arranged, scans one by one cross section around a certain part of a human body, has the characteristics of quick scanning time, clear images and the like, and can be used for checking various diseases.
The detector array is formed by splicing a plurality of small data acquisition modules.
The traditional data acquisition method of the detector array is 'top-down'. In the working process of the CT equipment, data acquisition of each detector array needs to be performed by upper software to send out a data acquisition command or by a rack rotary encoder to send out data acquisition pulses, and the data acquisition pulses are issued to the data acquisition module through a data chain to inform the data acquisition module to start data acquisition. In the process of issuing data acquisition commands or data acquisition pulses, the data acquisition commands or data acquisition pulses are transmitted step by step through a plurality of nodes and can be distributed to each data acquisition module finally, so that the data acquisition module is very complicated.
Therefore, the conventional data acquisition method of the detector array has a great problem that in the transmission process of the data acquisition command or the data acquisition pulse, the time of the data acquisition command or the data acquisition pulse reaching each data acquisition module is different due to different transmission paths. This problem results in different moments when each data acquisition module starts to perform data acquisition, which results in ring artifacts in the reconstructed image, affecting the image quality, when the CT imaging device is imaging.
Disclosure of Invention
Based on this, it is necessary to provide a data acquisition synchronization device for the problem that in the data acquisition method of the conventional detector array, the time of arrival of the data acquisition command or the data acquisition pulse at each data acquisition module is different due to the different transmission paths.
The application provides a data acquisition synchronization device which is applied to CT imaging equipment, wherein the CT imaging equipment comprises a bracket shell and a circular ring, the circular ring is arranged in the bracket shell and can rotate relative to the axial direction of the bracket shell, an X-ray tube and a detector array are fixedly arranged on the circular ring, the detector array is used for receiving X-rays emitted by the X-ray tube, and the detector array comprises a plurality of data acquisition modules which are arranged in parallel along the circumferential direction of the circular ring;
the data acquisition synchronization device includes:
the data acquisition synchronization units are equal to the data acquisition modules in number, and each data acquisition synchronization unit is connected with each data acquisition module;
the data acquisition synchronization unit includes:
the X-ray detection component is electrically connected with the data acquisition module and is used for receiving X-rays emitted by the X-ray tube; when the intensity of the X-ray received by the X-ray detection component reaches a preset intensity threshold, the X-ray detection component sends a synchronous signal to the data acquisition module, so that the data acquisition module executes data acquisition work according to the synchronous signal.
The application relates to a data acquisition synchronization device, through setting up the X-ray detection part that is connected with every data acquisition module electricity, realize when the relative CT imaging device's of data acquisition module support casing removes, can receive the X-ray that X-ray tube sent, and when X-ray detection part received the intensity of X-ray reaches the preset intensity threshold value, to data acquisition module sends synchronous signal, so that data acquisition module basis synchronous signal carries out data acquisition work. The data acquisition synchronization equipment provided by the application enables a plurality of data acquisition modules to simultaneously receive the synchronization signals and simultaneously start to execute data acquisition work, and avoids annular artifacts generated due to different moments when the plurality of data acquisition modules start to execute the data acquisition work when the CT imaging equipment is used for imaging.
Drawings
FIG. 1 is a perspective view of a data acquisition synchronization device according to an embodiment of the present application in use with a CT imaging device;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a perspective view of a data acquisition synchronization device according to another embodiment of the present application in use with a CT imaging device;
FIG. 4 is a side view of a shielding member shielding an X-ray detection member when the data acquisition synchronization apparatus provided in the embodiment of FIG. 3 is used in conjunction with a CT imaging apparatus;
FIG. 5 is a state diagram of the data acquisition synchronization device provided in the embodiment of FIG. 3 when the shielding member shields the X-ray detection member during the process of cooperating with the CT imaging device;
FIG. 6 is a state diagram of the data acquisition synchronization device provided in the embodiment shown in FIG. 3 when the shielding member does not shield the X-ray detection member during the process of cooperating with the CT imaging device;
fig. 7 is a flowchart of a data acquisition synchronization method according to an embodiment of the present application.
Reference numerals:
10 CT imaging apparatus
110. Bracket shell
111. Annular inner wall
120. Circular ring
121 X-ray tube
122. Detector array
122a data acquisition module
20. Data acquisition synchronization device
200. Data acquisition synchronization unit
210 X-ray detecting unit
211. First interval
220. Bearing component
230. Light shielding member
231. Second interval
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The present application provides a data acquisition synchronization apparatus 20.
It should be noted that, the application field and application scenario of the data acquisition synchronization device 20 provided in the present application are not limited. Alternatively, the data acquisition synchronization apparatus 20 provided herein is applied to the CT imaging apparatus 10. The CT imaging apparatus 10 includes a support housing 110 and a ring 120, the ring 120 is disposed in the support housing 110 and is rotatable relative to an axial direction of the support housing 110, the ring 120 is fixedly provided with an X-ray tube 121 and a detector array 122, the detector array 122 is configured to receive X-rays emitted by the X-ray tube 121, and the detector array 122 includes a plurality of data acquisition modules 122a arranged in parallel along a circumferential direction of the ring 120.
Specifically, fig. 1 is a perspective view of a data acquisition synchronization device according to an embodiment of the present application when the data acquisition synchronization device is used in cooperation with a CT imaging device. In fig. 1, the CT imaging apparatus 10 has an outer cover removed from an outer surface of a housing 110, and a structure inside the housing 110 is shown. As shown in fig. 1, the ring 120 is embedded in the bracket housing 110. The holder housing 110 includes an annular inner wall 111. The inner diameter of the ring 120 is slightly larger than the radius of the annular inner wall 111, so that the ring 120 is attached to the annular inner wall 111. It is understood that the ring 120 is correspondingly sleeved outside the annular inner wall 111, and the ring 120 can rotate relative to the annular inner wall 111. The rotation direction of the ring 120 is the axial direction of the bracket housing 110. When the ring 120 rotates, the annular inner wall 111 remains stationary. The bracket shell 110 and the circular ring 120 form the CT imaging device 10, and the CT imaging device 10 is provided with an inner cavity.
With continued reference to fig. 1, the X-ray tube 121 and the detector array 122 are disposed on the outer surface of the ring 120 and are fixedly connected to the ring 120. The X-ray tube 121 and the detector array 122 are symmetrically arranged, so that when an object to be scanned extends into the inner cavity of the CT imaging apparatus 10, the X-rays emitted by the X-ray tube 121 may penetrate through the object to be scanned and irradiate the surface of the detector array 122, thereby realizing scanning operation.
As shown in fig. 1 and 2, in an embodiment of the present application, the data acquisition synchronization device 20 includes a plurality of data acquisition synchronization units 200. The number of the data acquisition synchronization units 200 is equal to the number of the data acquisition modules 122a. Each data acquisition synchronization unit 200 is connected to each data acquisition module 122a.
The data acquisition synchronization unit 200 comprises an X-ray detection unit 210. The X-ray detection unit 210 is electrically connected to the data acquisition module 122a. The X-ray detecting section 210 is configured to receive X-rays emitted from the X-ray tube 121. When the intensity of the X-ray received by the X-ray detecting unit 210 reaches a preset intensity threshold, the X-ray detecting unit 210 sends a synchronization signal to the data acquisition module 122a, so that the data acquisition module 122a performs a data acquisition operation according to the synchronization signal.
Specifically, each data acquisition synchronization unit 200 includes an X-ray detection unit 210. The X-ray detection unit 210 is electrically connected to the data acquisition module 122a. Since the data acquisition module 122a is fixedly connected to the ring 120, when the ring 120 rotates in the axial direction of the support housing 110, the X-ray detection unit 210 rotates together with the ring 120.
Since the X-ray tube 121 is also fixedly connected to the ring 120, the relative positions of the X-ray tube 121 and the X-data acquisition module 122a are fixed. It will be appreciated that, when the X-ray detecting unit 210 rotates together with the ring 120, the X-ray tube 121 also rotates together, so that the X-rays emitted from the X-ray tube 121 can be irradiated to the data acquisition module 122a and the upper surface of the X-ray detecting unit 210.
In order for the plurality of data collection modules 122a to simultaneously start performing data collection work, it is necessary to simultaneously transmit a synchronization signal to the plurality of data collection modules 122a. The application adopts a 'bottom-up' synchronous signal transmission mode, does not adopt a mode of transmitting synchronous signals by upper software with higher delay, and completes the step of simultaneously transmitting synchronous signals to the plurality of data acquisition modules 122a by setting the X-ray detection part 210 according to the intensity of X-rays received by the X-ray detection part.
Specifically, the X-ray detecting section 210 may be an X-ray sensor. The X-ray detecting section 210 receives X-rays emitted from the X-ray tube 121 during rotation, and can adjust the intensity of the received X-rays. The X-ray detecting unit 210 receives the continuous change of the intensity of the X-ray, and when the intensity of the X-ray received by the X-ray detecting unit 210 reaches a preset intensity threshold, the X-ray detecting unit 210 may send a synchronization signal to the data collecting module 122a, so that the data collecting module 122a performs a data collecting operation according to the synchronization signal. It will be appreciated that the plurality of data acquisition modules 122a enable fast, delay-free and simultaneous data acquisition.
In addition, when the intensity of the X-ray received by the X-ray detecting unit 210 does not reach the preset intensity threshold, the X-ray detecting unit 210 cannot send a synchronization signal to the data acquisition module 122a, and the data acquisition module 122a stops data acquisition. It will be appreciated that the plurality of data acquisition modules 122a can also enable simultaneous data acquisition to be stopped. In summary, by providing multiple sets of X-ray detection units 210, the multiple data acquisition modules 122a sequentially perform data acquisition according to a workflow of simultaneously starting data acquisition, simultaneously stopping data acquisition, simultaneously starting data acquisition, and simultaneously stopping data acquisition …, thereby completing scanning.
In this embodiment, by providing the X-ray detecting unit 210 electrically connected to each data acquisition module 122a, when the data acquisition module 122a moves relative to the support housing 110 of the CT imaging apparatus 10, the X-ray detecting unit 210 may receive the X-ray emitted by the X-ray tube 121, and when the intensity of the X-ray received by the X-ray detecting unit 210 reaches the preset intensity threshold, a synchronization signal is sent to the data acquisition module 122a, so that the data acquisition module 122a performs a data acquisition operation according to the synchronization signal. The data acquisition synchronization device 20 provided by the application enables the plurality of data acquisition modules 122a to simultaneously receive the synchronization signal and simultaneously start to execute the data acquisition work, so that ring artifacts generated due to different moments when the plurality of data acquisition modules 122a start to execute the data acquisition work are avoided when the CT imaging device 10 is used for imaging.
In one embodiment of the present application, the X-ray detection unit 210 adjusts the intensity of the received X-rays based on an adaptive algorithm.
Specifically, the adjustment of the intensity of the received X-rays by the X-ray detecting unit 210 may be implemented by two methods, i.e., hardware (hardware structure) or software (program or algorithm control). This embodiment describes a manner of implementation by software (program or algorithm control). In this embodiment, a processor may be provided inside each X-ray detection section 210. The X-ray detection unit 210 may perform an adaptive algorithm by means of a built-in processor to adjust the intensity of the received X-rays. For example, the adaptive algorithm may adjust the intensity of the received X-rays by adjusting the number of activations of the plurality of photosensitive elements in the X-ray detection unit 210. The greater the number of on photosensitive elements, the higher the intensity at which the X-ray detection section 210 receives the X-rays. When the X-ray detecting units 210 simultaneously control the intensities of the X-rays received by the X-ray detecting units 210 to reach the preset intensity threshold, the X-ray detecting units 210 simultaneously send synchronization signals to the corresponding data acquisition modules 122a, so that the data acquisition modules 122a simultaneously execute data acquisition according to the corresponding synchronization signals.
In this embodiment, the intensity of the X-rays received by each X-ray detecting unit 210 is adjusted based on an adaptive algorithm, so that the plurality of data acquisition modules 122a can simultaneously receive the synchronization signal and simultaneously start to perform the data acquisition operation, thereby avoiding the occurrence of ring artifacts caused by different moments when the plurality of data acquisition modules 122a start to perform the data acquisition operation when the CT imaging apparatus 10 is imaging.
As shown in fig. 3 and 4, in an embodiment of the present application, the data acquisition synchronization unit further includes a carrier 220. The bearing member 220 is fixedly connected to one end of the data acquisition module 122a. The carrying member 220 is used for carrying the X-ray detecting member 210. The carrier 220 moves the data acquisition module 122a, and the X-ray detecting unit 210 moves synchronously with the data acquisition module 122a.
Specifically, as shown in fig. 4, the bearing member 220 is fixedly connected to an end of the data acquisition module 122a near the ring 120. Alternatively, the bearing member 220 may have a plate-like structure. The X-ray detecting section 210 is placed on the upper surface of the carrier section 220. When the ring 120 rotates in the axial direction of the holder housing 110, the carrier member 220 and the X-ray detecting member 210 rotate together with the ring 120. In order to prevent the X-ray detecting section 210 from falling off the carrier section 220 or being positionally offset during rotation, the X-ray detecting section 210 may be fixedly coupled to the upper surface of the carrier section 220.
When the carrier 220 and the X-ray detecting unit 210 rotate together with the ring 120, the X-ray tube 121 also rotates together, so that the X-rays emitted from the X-ray tube 121 can be irradiated to the upper surfaces of the data acquisition module 122a and the X-ray detecting unit 210.
In this embodiment, the carrier 220 is provided to carry the X-ray detecting unit 210, so that the X-ray detecting unit 210 is prevented from falling off the carrier 220 or being displaced along with the rotation of the ring 120.
With continued reference to fig. 3 and 4, in an embodiment of the present application, the data acquisition synchronization unit further includes a light shielding member 230. The shielding member 230 is disposed between the X-ray tube 121 and the data acquisition module 122a. The light shielding member 230 is also fixedly connected to the bracket housing 110. When the X-ray detecting section 210 moves, the shielding section 230 covers the surface of the X-ray detecting section 210 that receives the X-rays to block the X-ray detecting section 210 from receiving the X-rays.
Specifically, the present embodiment describes a manner of adjusting the intensity of the received X-rays by the X-ray detection section 210 by hardware (hardware) implementation. Each data acquisition synchronization unit 200 includes an X-ray detection section 210, a carrier section 220, and a shutter section 230.
As shown in fig. 4, the light shielding member 230 is disposed between the X-ray tube 121 and the data acquisition module 122a. The light shielding member 230 is fixedly connected with the bracket housing 110. Specifically, the light shielding member 230 is fixedly connected to the annular inner wall 111. It will be appreciated that the shielding member 230 remains stationary while the carrier member 220, the X-ray detection member 210 and the X-ray tube 121 rotate with the ring 120, the X-ray detection member 210 being shielded by the shielding member 230. Alternatively, the number of the light shielding members 230 is plural, and the number of the light shielding members 230 is equal to the number of the X-ray detecting members 210.
The intensity of the X-rays received by the X-ray detecting unit 210 naturally varies according to the degree to which the X-ray detecting unit 210 is shielded by the shielding unit 230. When the shielding degree of the shielding member 230 is low, the X-ray detecting member 210 may send a synchronization signal to the data collecting module 122a when the intensity of the X-ray received by the X-ray detecting member 210 reaches a preset intensity threshold, so that the data collecting module 122a performs a data collecting operation according to the synchronization signal. It will be appreciated that the plurality of data acquisition modules 122a enable fast, delay-free and simultaneous data acquisition.
On the contrary, when the shielding degree of the shielding member 230 is higher, the X-ray detecting member 210 cannot send a synchronization signal to the data collecting module 122a when the intensity of the X-ray received by the X-ray detecting member 210 does not reach the preset intensity threshold, and the data collecting module 122a stops collecting data. The plurality of data collection modules 122a may simultaneously stop data collection.
In this embodiment, by the light shielding component 230 fixedly connected to the support housing 110, when the X-ray detecting component 210 moves, shielding of the surface of the X-ray detecting component 210 that receives the X-ray can be achieved, so as to block the X-ray detecting component 210 from receiving the X-ray, further, the multiple data acquisition modules 122a receive the synchronization signal simultaneously, and simultaneously start to perform the data acquisition operation, so that the occurrence of ring artifacts caused by different moments when the multiple data acquisition modules 122a start to perform the data acquisition operation during imaging of the CT imaging device 10 is avoided.
As shown in fig. 5 and 6, in an embodiment of the present application, a plurality of the X-ray detecting units 210 are arranged in parallel along the circumferential direction of the ring 120. The number of X-ray detection units 210 is equal to the number of data acquisition modules 122a. Each of the X-ray detection units 210 is electrically connected to each of the data acquisition modules 122a.
Specifically, as shown in fig. 5 and 6, a plurality of the X-ray detecting sections 210 are arranged in parallel along the circumferential direction of the circular ring 120. Each of the X-ray detecting sections 210 is electrically connected to each of the data acquisition modules 122a, since it is ensured that each of the data acquisition modules 122a can receive the synchronization signal. It is understood that the number of X-ray detection units 210 is equal to the number of data acquisition modules 122a.
In this embodiment, the number of the X-ray detecting units 210 is set to be equal to the number of the data acquisition modules 122a, so that each data acquisition module 122a can receive the synchronization signal, and no missed non-scanned area is generated.
With continued reference to fig. 5 and 6, in an embodiment of the present application, a length of the surface of the X-ray detecting unit 210 that receives the X-rays along the circumferential direction of the ring 120 is smaller than a length of the surface of the data collecting module 122a that receives the X-rays along the circumferential direction of the ring 120, so that a space is generated between two adjacent X-ray detecting units 210.
Specifically, as shown in fig. 4, the surface of the X-ray detecting section 210 that receives the X-rays is the upper surface of the X-ray detecting section 210. The surface of the data acquisition module 122a that receives X-rays is the upper surface of the data acquisition module 122a. By setting the length of the surface of the X-ray detecting unit 210 that receives the X-rays along the circumferential direction of the ring 120 to be smaller than the length of the surface of the data collecting module 122a that receives the X-rays along the circumferential direction of the ring 120, an interval can be generated between two adjacent X-ray detecting units 210. Further, when the X-ray detecting unit 210 moves synchronously with the plurality of data acquisition modules 122a, the X-ray detecting unit 210 may be distributed with the light shielding unit 230 in a staggered manner by the interval, so that the area of the X-ray detecting unit 210, which is not shielded by the light shielding unit 230 or is shielded by the light shielding unit 230, is greatly reduced at a plurality of positions.
In this embodiment, by providing an interval between two adjacent X-ray detecting units 210, the X-ray detecting units 210 may be distributed by staggering the interval with the light shielding units 230, so that the area of the X-ray detecting units 210 at a certain position, which is not shielded by the light shielding units 230, or which is shielded by the light shielding units 230, is greatly reduced.
With continued reference to fig. 5 and 6, in an embodiment of the present application, a plurality of the light shielding members 230 are arranged in parallel along the circumferential direction of the ring 120.
Specifically, in order to achieve the purpose of shielding the X-ray detecting units 210, the light shielding units 230 are arranged in parallel along the circumferential direction of the ring 120, in the same manner as the X-ray detecting units 210.
In this embodiment, by arranging a plurality of the light shielding members 230 in parallel along the circumferential direction of the ring 120, the light shielding members 230 can achieve the purpose of shielding the X-ray detecting members 210.
In an embodiment of the present application, the area of the surface of the shielding member 230 facing the X-ray tube 121 is equal to the area of the surface of the X-ray detecting member 210 that receives the X-rays.
Specifically, the surface of the light shielding member 230 facing the X-ray tube 121 may be rectangular. The surface of the X-ray detecting section 210 receiving the X-rays may be rectangular. The shape of the surface of the shielding member 230 facing the X-ray tube 121 is the same as the shape of the surface of the X-ray detecting member 210 receiving the X-rays, and the area is the same.
In this embodiment, the area of the surface of the shielding member 230 facing the X-ray tube 121 is equal to the area of the surface of the X-ray detecting member 210 that receives the X-rays, so that the area of the X-ray detecting member 210 shielded by the shielding member 230 during the rotation of the X-ray detecting member 210 can be controlled. I.e. to facilitate setting of said preset intensity threshold.
With continued reference to fig. 5 and fig. 6, in an embodiment of the present application, the plurality of X-ray detecting units 210 are arranged at equal intervals, and a space generated between two adjacent X-ray detecting units 210 is a first space 211. The plurality of light shielding members 230 are arranged at equal intervals. The interval between two adjacent light shielding members 230 is a second interval 231.
Specifically, by arranging the plurality of X-ray detecting units 210 at equal intervals, when the plurality of X-ray detecting units 210 move synchronously with the plurality of data acquisition modules 122a, the area of each X-ray detecting unit 210 blocked by the light shielding unit 230 is the same, so that the plurality of X-ray detecting units 210 can send synchronous signals simultaneously.
Similar to the principle that the plurality of X-ray detecting units 210 are arranged at equal intervals, the plurality of light shielding units 230 are arranged at equal intervals, which is advantageous in that the area of each X-ray detecting unit 210 shielded by the light shielding unit 230 is the same, so that the plurality of X-ray detecting units 210 can transmit the synchronization signal at the same time.
In this embodiment, the plurality of X-ray detecting units 210 may transmit the synchronization signal at the same time by arranging the plurality of X-ray detecting units 210 at equal intervals such that each of the X-ray detecting units 210 has the same shielding area by the shielding unit 230. By providing the plurality of light shielding members 230 to be arranged at equal intervals, the plurality of X-ray detecting members 210 can transmit the synchronization signal at the same time.
In an embodiment of the present application, the length of the first interval 211 is equal to the length of the second interval 231.
Specifically, the length of the first interval 211 is equal to the length of the second interval 231. The length of the first space 211 is in the range of 10 micrometers to 50 micrometers.
In this embodiment, by setting the length of the first interval 211 to be equal to the length of the second interval 231, the plurality of X-ray detecting units 210 can simultaneously transmit the synchronization signal, which has high accuracy and no delay.
In an embodiment of the present application, during the movement of the X-ray detecting unit 210 relative to the light shielding unit 230, the X-ray detecting unit 210 obtains an area of the surface of the X-ray detecting unit 210 that is not covered by the light shielding unit 230, and when the area value of the area reaches a preset area value, the X-ray detecting unit 210 sends a synchronization signal to the data collecting module 122a, so that the data collecting module 122a performs a data collecting operation according to the synchronization signal.
Specifically, the preset area value may be preset by an equipment operator. The larger the area value of the area of the surface of the X-ray detecting part 210 not covered by the shielding part 230, the higher the intensity of the X-rays received by the X-ray detecting part 210. Conversely, the smaller the area value of the area of the surface of the X-ray detecting section 210 not covered by the light shielding section 230, the lower the intensity of the X-rays received by the X-ray detecting section 210. The preset area value may be set according to the above principle. And calculating the preset intensity threshold according to the preset area value. It is understood that when the area value of the area of the surface of the X-ray detecting section 210 not covered by the shielding section 230 reaches a preset area value, the intensity of the X-rays received by the X-ray detecting section 210 reaches the preset intensity threshold. At this time, the X-ray detecting unit 210 sends a synchronization signal to the data acquisition module 122a, so that the data acquisition module 122a performs a data acquisition operation according to the synchronization signal. The principle of stopping the data collection operation of the data collection module 122a is similar, and will not be described herein.
In this embodiment, the transmission of the synchronization signal is implemented by setting a preset area value of the area of the X-ray detecting unit 210 not covered by the light shielding unit 230, so that the plurality of data acquisition modules 122a perform data acquisition according to the plurality of synchronization signals at the same time.
In an embodiment of the present application, during the movement of the X-ray detecting unit 210 relative to the light shielding unit 230, the X-ray detecting unit 210 obtains a voltage value or a current value of the X-ray converted electrical signal received by the X-ray detecting unit 210, and when the voltage value of the converted electrical signal reaches a preset voltage value or when the current value of the converted electrical signal reaches a preset current value, the X-ray detecting unit 210 sends a synchronization signal to the data acquisition module 122a, so that the data acquisition module 122a performs a data acquisition operation according to the synchronization signal.
Specifically, the X-ray detecting section 210 may convert X-rays into an electrical signal when receiving the X-rays. The higher the intensity of the X-rays, the larger the voltage value of the converted electric signal and the larger the current value. The preset intensity threshold value of the X-ray intensity received by the X-ray detection unit 210 may be associated with a voltage value or a current value of the X-ray converted electrical signal. It can be appreciated that, during the movement of the X-ray detecting unit 210 relative to the shielding unit 230, the X-ray detecting unit 210 may acquire a voltage value or a current value of the received X-ray converted into an electrical signal in real time, and compare the voltage value with a preset voltage value or compare the current value with a preset current value. And when the voltage value of the converted electric signal reaches a preset voltage value or when the current value of the converted electric signal reaches a preset current value, the X-ray detection unit 210 sends a synchronization signal to the data acquisition module 122a, so that the data acquisition module 122a performs data acquisition according to the synchronization signal.
The preset voltage value or the preset current value may be preset by an equipment operator.
In this embodiment, by setting the preset voltage value or the preset current value of the X-ray converted electrical signal received by the X-ray detecting unit 210, the synchronization signal is sent, so that the plurality of data acquisition modules 122a perform the data acquisition operation simultaneously according to the plurality of synchronization signals.
The application also provides a data acquisition synchronization method. The data acquisition synchronization method provided by the application is not limited to the execution subject. Alternatively, the execution subject of the data acquisition synchronization method may be the X-ray detection section 210 in the data acquisition synchronization apparatus 20 mentioned above. The data acquisition synchronization method provided by the present application can be applied to the data acquisition synchronization device 20 mentioned in the foregoing.
As shown in fig. 5, in an embodiment of the present application, the data acquisition synchronization method includes the following steps S100 to S300:
s100, X-rays emitted by the X-ray tube 121 are acquired in real time during the rotation of the circular ring 120 of the CT imaging device 10.
Specifically, the X-ray detecting unit 210 rotates together with the ring 120 during the rotation of the ring 120, and acquires the X-rays emitted by the X-ray tube 121 in real time.
S200, judging whether the intensity of the obtained X-rays is larger than a preset intensity threshold value.
Specifically, the above has been mentioned. The shielding member 230 shields the X-ray detecting unit 210 when the X-ray detecting unit 210 rotates with the ring 120. The X-ray detecting section 210 determines whether the intensity of the acquired X-rays is greater than a preset intensity threshold. The preset intensity threshold may be preset by the device operator.
And S300, if the acquired X-ray intensity is greater than the preset intensity threshold, sending a synchronous signal to the data acquisition module 122a so as to control the data acquisition module 122a to execute data acquisition work according to the synchronous signal.
Specifically, if the acquired X-ray intensity is greater than the preset intensity threshold, the step returns to step S100.
The present embodiment can realize that when the detector array 122 of the CT imaging apparatus 10 rotates to a certain position, the plurality of X-ray detecting units 210 simultaneously receive the X-rays sent by the X-ray tube 121, and simultaneously send synchronization signals to the plurality of data acquisition modules 122a, so that the plurality of data acquisition modules 122a simultaneously perform data acquisition operations according to the synchronization signals. The detector array 122 continues to rotate, the plurality of shielding members 230 shield the plurality of X-ray detecting members 210, the plurality of X-ray detecting members 210 stop sending the synchronization signal, and the plurality of data collection modules 122a stop data collection. The data acquisition of the data acquisition module 122a is determined by the time when the synchronous signal is received, so that the synchronization of the data acquisition is realized.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (12)
1. The utility model provides a data acquisition synchronization equipment, is applied to CT imaging apparatus (10), CT imaging apparatus (10) include support casing (110) and ring (120), ring (120) set up in support casing (110) and can rotate relative the axial direction of support casing (110), ring (120) fixed mounting has X-ray tube (121) and detector array (122), detector array (122) are used for receiving X-ray that X-ray tube (121) transmitted, detector array (122) include a plurality of edges data acquisition module (122 a) of arranging side by side in the circumferencial direction of ring (120), its characterized in that, data acquisition synchronization equipment includes:
the data acquisition synchronization units (200), the number of the data acquisition synchronization units (200) is equal to the number of the data acquisition modules (122 a), and each data acquisition synchronization unit (200) is connected with each data acquisition module (122 a);
the data acquisition synchronization unit (200) comprises:
an X-ray detection unit (210), wherein the X-ray detection unit (210) is electrically connected with the data acquisition module (122 a), and the X-ray detection unit (210) moves synchronously with the data acquisition module (122 a) and is used for receiving the X-rays emitted by the X-ray tube (121); when the intensity of the X-ray received by the X-ray detection component (210) reaches a preset intensity threshold, the X-ray detection component (210) sends a synchronous signal to the data acquisition module (122 a) so that the data acquisition module (122 a) executes data acquisition work according to the synchronous signal.
2. The data acquisition synchronization device of claim 1, wherein the X-ray detection component (210) adjusts the intensity of the received X-rays based on an adaptive algorithm.
3. The data acquisition synchronization device according to claim 1, characterized in that the data acquisition synchronization unit (200) further comprises:
and the bearing component (220) is fixedly connected with one end of the data acquisition module (122 a) and is used for bearing the X-ray detection component (210) and enabling the X-ray detection component (210) to synchronously move along with the data acquisition module (122 a) when the data acquisition module (122 a) moves.
4. A data acquisition synchronization device according to claim 3, characterized in that the data acquisition synchronization unit (200) further comprises:
the shading component (230) is arranged between the X-ray tube (121) and the data acquisition module (122 a) and is fixedly connected with the support shell (110), and when the X-ray detection component (210) moves, the shading component (230) covers the surface of the X-ray detection component (210) for receiving X-rays so as to block the X-ray detection component (210) from receiving the X-rays.
5. The data acquisition synchronization device according to claim 4, wherein a plurality of the X-ray detection units (210) are arranged in parallel along a circumferential direction of the circular ring (120), the number of the X-ray detection units (210) being equal to the number of the data acquisition modules (122 a), each of the X-ray detection units (210) being electrically connected to each of the data acquisition modules (122 a).
6. The data acquisition synchronization device according to claim 5, wherein a length of a surface of the X-ray receiving member (210) along a circumferential direction of the circular ring (120) is smaller than a length of a surface of the data acquisition module (122 a) receiving X-rays along the circumferential direction of the circular ring (120) such that a space is generated between two adjacent X-ray detecting members (210).
7. The data acquisition synchronization apparatus according to claim 6, wherein a plurality of the light shielding members (230) are arranged side by side in a circumferential direction of the circular ring (120).
8. The data acquisition synchronization device according to claim 7, characterized in that an area of a surface of the shielding member (230) facing the X-ray tube (121) is equal to an area of a surface of the X-ray detection member (210) receiving X-rays.
9. The data acquisition synchronization device according to claim 8, wherein the plurality of X-ray detection units (210) are arranged at equal intervals, and a space generated between two adjacent X-ray detection units (210) is a first space (211); the plurality of light shielding members (230) are arranged at equal intervals, and the interval between two adjacent light shielding members (230) is a second interval (231).
10. The data acquisition synchronization device according to claim 9, characterized in that the length of the first interval (211) is equal to the length of the second interval (231).
11. The data acquisition synchronization device according to claim 10, wherein the X-ray detection unit (210) acquires an area of a surface of the X-ray detection unit (210) not covered by the light shielding unit (230) during a movement of the X-ray detection unit (210) relative to the light shielding unit (230), and when an area value of the area reaches a preset area value, the X-ray detection unit (210) sends a synchronization signal to the data acquisition module (122 a) so that the data acquisition module (122 a) performs a data acquisition operation according to the synchronization signal.
12. The apparatus according to claim 10, wherein the X-ray detecting unit (210) transmits a synchronization signal to the data collecting module (122 a) to cause the data collecting module (122 a) to perform a data collecting operation according to the synchronization signal by acquiring a voltage value or a current value of an X-ray converted electric signal received by the X-ray detecting unit (210) during a movement of the X-ray detecting unit (210) relative to the light shielding unit (230) and when the voltage value of the converted electric signal reaches a preset voltage value or when the current value of the converted electric signal reaches a preset current value.
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