CN106952261A - A kind of image processing method and device for suppressing fat signal - Google Patents
A kind of image processing method and device for suppressing fat signal Download PDFInfo
- Publication number
- CN106952261A CN106952261A CN201710221041.7A CN201710221041A CN106952261A CN 106952261 A CN106952261 A CN 106952261A CN 201710221041 A CN201710221041 A CN 201710221041A CN 106952261 A CN106952261 A CN 106952261A
- Authority
- CN
- China
- Prior art keywords
- fat
- magnetic resonance
- resonance system
- signal
- resonant frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
- G06T2207/10072—Tomographic images
- G06T2207/10088—Magnetic resonance imaging [MRI]
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Quality & Reliability (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses a kind of image processing method and device for suppressing fat signal, methods described includes：The free induction decay signal collected is carried out Fourier transform and obtains the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water and fat by magnetic resonance system；Magnetic resonance system obtains the resonant frequency distribution situation of actual fat Hydrogen Proton according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat and matches fat saturation pulse；The fat saturation pulse that magnetic resonance system is obtained using matching carries out fatty saturation, so as to suppress the generation of fat signal, generates the fat suppression image of magnetic resonance.The present invention applies the fat saturation pulse of different bandwidth and centre frequency according to the resonant frequency distribution situation of actual fatty Hydrogen Proton, the suppression of fat signal is carried out by fat saturation pulse, the success rate of fat suppression is improved, so as to obtain the obvious MRI of fat suppression effect.
Description
Technical field
The present invention relates to technical field of image processing, and in particular to a kind of image processing method and dress of suppression fat signal
Put.
Background technology
In magnetic resonance, the Hydrogen Proton in fat and water is because chemical shift（Core of the proton caused by chemical environment
The change of magnetic resonance signal position）The reason for there are different resonant frequencies.For preferably lesions showed in some sequences,
The signal fat is needed to curb, then to be accomplished by first applying a narrow-band impulse for Hydrogen Proton resonant frequency in fat
Hydrogen Proton saturation in fat is fallen.Then reuse wideband pulse to go normally to excite tissue, now because of the hydrogen matter in fat
Son is saturated, then will not produce signal, and the image at this moment produced is exactly the fat suppression image of magnetic resonance.
Prior art is the Hydrogen Proton in the pulse desaturation fat using fixed bandwidth and centre frequency, and the technology makes
Premise is exactly that the fatty Hydrogen Proton resonant frequency that goes out of the resonant frequency of Hydrogen Proton in actual fat and theoretical calculation is consistent
's.But, the resonant frequency of actual fat Hydrogen Proton is not only influenceed by chemical shift, but also by local susceptibility, people
The influence of many factors such as body geometry, thus in actual fat the resonant frequency of Hydrogen Proton with it is theoretical calculate go out hydrogen
The resonant frequency of proton has different.If the pulse for saturated fat Hydrogen Proton comes out according to theoretical calculation
Bandwidth and centre frequency will produce larger difference come what is applied, necessarily have some or all of fat not to be saturated.
Some shimmings are relatively easy to human body, and fat suppression effect is relatively good；And in the more difficult position of shimming, such as partial center compared with
The remote or larger tissue of susceptibility difference, fat suppression effect is just poor, then can not just show that fat suppression effect is bright
Aobvious MRI.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is that the drawbacks described above for prior art is believed there is provided one kind suppression fat
Number image processing method and device, it is intended to different bands is applied according to the resonant frequency distribution situation of actual fatty Hydrogen Proton
The fat saturation pulse of wide and centre frequency, the suppression of fat signal is carried out by fat saturation pulse, so as to obtain fatty suppression
The obvious MRI of effect processed.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of image processing method for suppressing fat signal, wherein, comprise the following steps：
The free induction decay signal collected progress Fourier transform is obtained hydrogen in water and fat by step A, magnetic resonance system
The frequency spectrum of Proton Resonance Frequency distribution；
Step B, magnetic resonance system obtain actual fat hydrogen matter according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
The resonant frequency distribution situation of son simultaneously matches fat saturation pulse；
The fat saturation pulse that step C, magnetic resonance system are obtained using matching carries out fatty saturation, so as to suppress fat signal
Produce, generate the fat suppression image of magnetic resonance.
The image processing method of described suppression fat signal, wherein, the step A is specifically included：
Step A1, magnetic resonance system advance with shim coil and carry out 3D automatic shimmings；
Step A2, magnetic resonance system collect free induction decay signal and carry out Fourier transform after 3D automatic shimmings
Obtain the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water and fat.
The image processing method of described suppression fat signal, wherein, the step B is specifically included：
The spectrum analysis that step B1, magnetic resonance system are distributed according to Hydrogen Proton resonant frequency in water and fat obtains actual fat hydrogen
The resonant frequency distribution situation of proton；
The fat that step B2, magnetic resonance system are actually needed according to the resonant frequency distribution situation analysis of actual fatty Hydrogen Proton
The bandwidth and centre frequency of fat saturation pulse；
The bandwidth and centre frequency of the fat saturation pulse of step B3, magnetic resonance system according to actual needs, Auto-matching go out most
Close to the fat saturation pulse of actual fatty Hydrogen Proton resonant frequency bandwidth.
The image processing method of described suppression fat signal, wherein, also include before the step B：It is common in magnetic in advance
In vibrating system set 21 different bandwidths fat saturation pulse and storage, and the fat saturation pulse bandwidth range from
250 hertz to 450 hertz, 10 hertz are differed between each fat saturation pulse；The step B3 specifically also includes：Step B31,
The fat saturation pulse that magnetic resonance system is matched and is actually needed from the fat saturation pulse of 21 different bandwidths
Bandwidth and the immediate fat saturation pulse of centre frequency.
The image processing method of described suppression fat signal, wherein, the step C is specifically included：
Hydrogen Proton in fat is carried out saturation by the fat saturation pulse that step C1, magnetic resonance system are obtained using matching；
Step C2, when magnetic resonance system complete fat signal process of inhibition after, generate magnetic resonance fat suppression image.
The image processing method of described suppression fat signal, wherein, Hydrogen Proton resonant frequency point in the water and fat
The frequency spectrum of cloth includes：The water peak of the Hydrogen Proton formation of water and the fatty peak of the Hydrogen Proton formation of fat；The water peak and fatty peak
Distributed image using resonant frequency as X-axis；The frequency spectrum that Hydrogen Proton resonant frequency is distributed in the water and fat also includes：Institute
The both sides baseline position for stating fatty peak places two mark lines respectively, and the distance between two mark lines are the fatty peak
The frequency at center is the centre frequency at the fatty peak between bandwidth, two mark lines.
A kind of image processing apparatus for suppressing fat signal, wherein, described device includes：
Signal acquisition module, for controlling magnetic resonance system to obtain the free induction decay signal collected progress Fourier transform
The frequency spectrum that Hydrogen Proton resonant frequency is distributed into water and fat；
Pulse matching module, for controlling magnetic resonance system to be analyzed according to Hydrogen Proton resonant frequency spread spectrum in water and fat
To actual fatty Hydrogen Proton resonant frequency distribution situation and match fat saturation pulse；
Image generation module, for controlling the fat saturation pulse that magnetic resonance system is obtained using matching to carry out fatty saturation, from
And suppress the generation of fat signal, generate the fat suppression image of magnetic resonance.
The image processing apparatus of described suppression fat signal, wherein, the signal acquisition module is specifically included：
Automatic shimming unit, 3D automatic shimmings are carried out for controlling magnetic resonance system to advance with shim coil；
Signal acquisition and converter unit, for controlling magnetic resonance system after 3D automatic shimmings, collect free induction decay
Signal simultaneously carries out the frequency spectrum that Fourier transform obtains Hydrogen Proton resonant frequency distribution in water and fat.
The image processing apparatus of described suppression fat signal, wherein, the pulse matching module is specifically included：
Spectral analysis unit, for controlling magnetic resonance system according to the spectrum analysis that Hydrogen Proton resonant frequency is distributed in water and fat
Obtain the resonant frequency distribution situation of actual fat Hydrogen Proton；
Pulse processing unit, for controlling magnetic resonance system to be analyzed according to the resonant frequency distribution situation of actual fatty Hydrogen Proton
To the bandwidth and centre frequency of the fat saturation pulse being actually needed；
Automatic matching unit, for control the fat saturation pulse of magnetic resonance system according to actual needs bandwidth and center frequently
Rate, Auto-matching goes out the fat saturation pulse closest to actual fatty Hydrogen Proton resonant frequency bandwidth.
The image processing apparatus of described suppression fat signal, wherein, described image generation module is specifically included：
Hydrogen Proton saturation unit, for controlling magnetic resonance system using the obtained fat saturation pulse of matching by the Hydrogen Proton in fat
Carry out saturation；
Signal suppresses and image generation unit, for controlling after magnetic resonance system completes fat signal process of inhibition, to generate magnetic
The fat suppression image of resonance.
Beneficial effects of the present invention：The image processing method and device for a kind of suppression fat signal that the present invention is provided, institute
The method of stating includes：The free induction decay signal collected progress Fourier transform is obtained hydrogen in water and fat by magnetic resonance system
The frequency spectrum of Proton Resonance Frequency distribution；Magnetic resonance system is obtained according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
The resonant frequency distribution situation of actual fat Hydrogen Proton simultaneously matches fat saturation pulse；Magnetic resonance system is obtained using matching
Fat saturation pulse carries out fatty saturation, so as to suppress the generation of fat signal, generates the fat suppression image of magnetic resonance.This hair
The bright resonant frequency distribution situation according to actual fatty Hydrogen Proton applies the fatty saturation arteries and veins of different bandwidth and centre frequency
Punching, the suppression of fat signal is carried out by fat saturation pulse, so as to obtain the obvious MRI of fat suppression effect.
Brief description of the drawings
Fig. 1 is the flow chart of the preferred embodiment for the image processing method that the present invention suppresses fat signal.
Fig. 2 is that the water for the image processing method that the present invention suppresses fat signal and Hydrogen Proton resonant frequency in fat are distributed
Spectrogram.
Fig. 3 be the present invention suppress fat signal image processing method in fat signal whether suppress MRI effect
The comparison diagram of fruit.
Fig. 4 is the functional schematic block diagram of the preferred embodiment for the image processing apparatus that the present invention suppresses fat signal.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and without
It is of the invention in limiting.
Fig. 1 described in present pre-ferred embodiments is the preferable implementation for the image processing method that the present invention suppresses fat signal
The flow chart of example, as shown in figure 1, the image processing method for suppressing fat signal comprises the following steps：
Step S100, magnetic resonance system obtain the free induction decay signal collected progress Fourier transform in water and fat
The frequency spectrum of Hydrogen Proton resonant frequency distribution.
It is preferred that the step S100 comprises the following steps：
Step S101, magnetic resonance system advance with shim coil and carry out 3D automatic shimmings；
Step S102, magnetic resonance system collect free induction decay signal and carry out Fourier change after 3D automatic shimmings
Get the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water and fat in return.
During specific implementation, due to requiring that magnet system can provide the magnetostatic field of high uniformity in magnetic resonance imaging system,
This is also to obtain high-quality MRI（Magnetic resonance imaging, magnetic resonance imaging）The basic guarantee of image.MRI
The principle of Fat-suppression technique is with clinical practice in magnetic resonance imaging（MRI）In, due to the Hydrogen Proton in adipose tissue and other
Molecule environment residing for Hydrogen Proton in tissue is different so that their resonant frequency is differed；When fatty and other tissues
Hydrogen Proton is encouraged by radio-frequency pulse simultaneously after, their relaxation time is also different.Signal is gathered in the different echo times,
Adipose tissue and non-fat tissue show different signal intensities.Utilize the above-mentioned characteristic of different tissues, then be accomplished by
Go out to suppress the pulse of fat signal.
To obtain a stable uniform field, the present invention uses active shimming coil, is produced by the electric current in control coil
The magnetic-field component of raw different directions is added in main field, realizes the real-time correction to magnetic field, and magnetic resonance system utilizes described even
Field coil realizes 3D automatic shimmings.Magnetic resonance system collects FID after 3D automatic shimmings（FREE INDUCTION
DECAY, free induction decay）Signal simultaneously carries out the frequency that Fourier transform obtains the Hydrogen Proton resonant frequency distribution of tissue
Spectrum.
Fourier transform, represents to meet some function representation of certain condition into trigonometric function（Sinusoidal and/or cosine
Function）Or the linear combination of their integration, in different research fields, Fourier transform has a variety of different change bodily forms
Formula, such as continuous Fourier transform and DFT.Initial Fourier analysis is the work of the analytical analysis as thermal process
What tool was suggested.In physics, electrical type subject, number theory, Combinational Mathematics, signal transacting, probability theory, statistics, cryptography, sound
The fields such as, optics, oceanography, Structural Dynamics suffer from being widely applied.
Fourier transform is a kind of method of signal Analysis, it can signal Analysis composition, it is also possible to these compositions synthesize
Signal.Many waveforms can as signal composition, such as sine wave, square wave, sawtooth waveforms etc., Fourier transformation sine wave conduct
The composition of signal.
Fourier transform formula is：
Formula is described：F (ω) is f (t) transform in formula, and f (t) is F (ω) picture original function.
Formed it is preferred that the frequency spectrum of the Hydrogen Proton resonant frequency distribution of the tissue includes Hydrogen Proton in water and fat
Water peak with fat Hydrogen Proton formation fatty peak.As shown in Fig. 2 Fig. 2 is the image procossing that the present invention suppresses fat signal
The spectrogram that Hydrogen Proton resonant frequency is distributed in the water and fat of method.Left-side images are the Hydrogen Proton formation of fat in Fig. 2
Fatty peak, the water peak that image right is formed for the Hydrogen Proton of water.
Step S200, magnetic resonance system obtain actual fat according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
The resonant frequency distribution situation of fat Hydrogen Proton simultaneously matches fat saturation pulse.
It is preferred that the step S200 comprises the following steps：
The spectrum analysis that step S201, magnetic resonance system are distributed according to Hydrogen Proton resonant frequency in water and fat obtains actual fat
The resonant frequency distribution situation of Hydrogen Proton；
Step S202, magnetic resonance system are actually needed according to the resonant frequency distribution situation analysis of actual fatty Hydrogen Proton
The bandwidth and centre frequency of fat saturation pulse；
The bandwidth and centre frequency of the fat saturation pulse of step S203, magnetic resonance system according to actual needs, Auto-matching go out
Closest to the fat saturation pulse of actual fatty Hydrogen Proton resonant frequency bandwidth.
During specific implementation, the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water of the magnetic resonance system according to Fig. 2 and fat
Analysis obtain the resonant frequency distribution situation and the bandwidth for the fat saturation pulse being actually needed of actual fat Hydrogen Proton with
Centre frequency.For the ease of intuitively from Fig. 2 from fatty Hydrogen Proton resonant frequency distribution, it is preferred that the water peak with
The distributed image at fatty peak is using resonant frequency as X-axis, therefore the frequency range of fatty Hydrogen Proton can be with gem-pure display
Out.Both sides baseline position in the present embodiment at the fatty peak is placed between two mark lines, and two mark lines respectively
Distance be the fatty peak bandwidth, the frequency at center is the centre frequency at the fatty peak between two mark lines.Therefore,
Magnetic resonance system just can be easily obtained the bandwidth and centre frequency of the fat saturation pulse being actually needed.
It is preferred that also including before the step B：The fat of 21 different bandwidths is set to satisfy in magnetic resonance system in advance
With pulse and store, and the fat saturation pulse bandwidth range from 250 hertz to 450 hertz, each fat saturation pulse
Between differ 10 hertz.A width of 250 ~ 260 hertz of the band of the fat saturation pulse pre-set, 260 ~ 270 hertz, 270 ~
280 hertz, 280 ~ 290 hertz ... 440 ~ 450 hertz.
Further, the bandwidth and centre frequency Auto-matching of the fat saturation pulse of magnetic resonance system according to actual needs
Go out the fat saturation pulse closest to actual fatty Hydrogen Proton resonant frequency bandwidth.During specific implementation, magnetic resonance system is from described
The bandwidth and centre frequency for the fat saturation pulse for matching and being actually needed in the fat saturation pulse of 21 different bandwidths are most
Close fat saturation pulse.For example, a width of 263 ~ 271 hertz of the band for the fat saturation pulse being actually needed, then magnetic resonance system
System Auto-matching and 263 ~ 271 hertz of immediate fat saturation pulses, i.e., 260 ~ 270 hertz of fat saturation pulse.
The fat saturation pulse that step S300, magnetic resonance system are obtained using matching carries out fatty saturation, so as to suppress fat
The generation of fat signal, generates the fat suppression image of magnetic resonance.
It is preferred that the step S300 is specifically included：
Hydrogen Proton in fat is carried out saturation by the fat saturation pulse that step S301, magnetic resonance system are obtained using matching；
Step S302, when magnetic resonance system complete fat signal process of inhibition after, generate magnetic resonance fat suppression image.
Specifically, the fat closest to actual fatty Hydrogen Proton resonant frequency bandwidth that magnetic resonance system is obtained using matching
Saturation pulse falls the Hydrogen Proton saturation in fat, such as described in above-mentioned example, and magnetic resonance system is immediate using matching
260 ~ 270 hertz of fat saturation pulse suppresses to fat signal, fat proton is not produced signal, so as to obtain only
Image containing water proton signals.
Based on above-described embodiment, present invention also offers fat signal in the image processing method for suppressing fat signal whether
The comparison diagram of the MRI effect of suppression.
As shown in Figure 3.A and B in Fig. 3 apply for the bandwidth and centre frequency that are gone out in the prior art according to theoretical calculation
The fat signal suppression technology design sketch of fat saturation pulse, C and D for the present invention the resonance according to actual fatty Hydrogen Proton frequently
Rate distribution situation applies the fat signal suppression technology design sketch of the fat saturation pulse of different bandwidth and centre frequency.By
Fig. 3 can be seen that have large stretch of adipose tissue not fallen by suppression in A and B（White portion in figure）, the present invention utilizes magnetic resonance system
The free induction decay signal collected is subjected to Fourier transform and obtains the frequency that Hydrogen Proton resonant frequency is distributed in water and fat
Spectrum；Magnetic resonance system obtains the resonance of actual fat Hydrogen Proton according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
Frequency distribution situation simultaneously matches fat saturation pulse；The fat saturation pulse that magnetic resonance system is obtained using matching carries out fat
Saturation, so as to suppress the generation of fat signal, generates in the fat suppression image of magnetic resonance, such as Fig. 3 that fat suppression is imitated in C and D
Fruit is substantially.
Present invention also offers a kind of image processing apparatus for suppressing fat signal, as shown in figure 4, described device includes：
Signal acquisition module 410, Fourier change is carried out for controlling magnetic resonance system by the free induction decay signal collected
Get the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water and fat in return；As detailed above.
Pulse matching module 420, for controlling magnetic resonance system according to Hydrogen Proton resonant frequency distribution frequency in water and fat
Analysis of spectrum obtains the resonant frequency distribution situation of actual fat Hydrogen Proton and matches fat saturation pulse；As detailed above.
Image generation module 430, the fat saturation pulse for controlling magnetic resonance system to be obtained using matching carries out fat
Saturation, so as to suppress the generation of fat signal, generates the fat suppression image of magnetic resonance；As detailed above.
The image processing apparatus of described suppression fat signal, wherein, the signal acquisition module is specifically included：
Automatic shimming unit, 3D automatic shimmings are carried out for controlling magnetic resonance system to advance with shim coil；Specific as above institute
State.
Signal acquisition and converter unit, for controlling magnetic resonance system after 3D automatic shimmings, collect free induction
Deamplification simultaneously carries out the frequency spectrum that Fourier transform obtains Hydrogen Proton resonant frequency distribution in water and fat；As detailed above.
The image processing apparatus of described suppression fat signal, wherein, the pulse matching module is specifically included：
Spectral analysis unit, for controlling magnetic resonance system according to the spectrum analysis that Hydrogen Proton resonant frequency is distributed in water and fat
Obtain the resonant frequency distribution situation of actual fat Hydrogen Proton；As detailed above.
Pulse processing unit, for controlling magnetic resonance system according to the resonant frequency distribution situation point of actual fatty Hydrogen Proton
Analyse the bandwidth and centre frequency for the fat saturation pulse being actually needed；As detailed above.
Automatic matching unit, bandwidth and center for controlling the fat saturation pulse of magnetic resonance system according to actual needs
Frequency, Auto-matching goes out the fat saturation pulse closest to actual fatty Hydrogen Proton resonant frequency bandwidth；As detailed above.
The image processing apparatus of described suppression fat signal, wherein, described image generation module is specifically included：
Hydrogen Proton saturation unit, for controlling magnetic resonance system using the obtained fat saturation pulse of matching by the Hydrogen Proton in fat
Carry out saturation；
Signal suppresses and image generation unit, for controlling after magnetic resonance system completes fat signal process of inhibition, to generate magnetic
The fat suppression image of resonance.
In summary, the invention provides a kind of image processing method and device for suppressing fat signal, methods described bag
Include：The free induction decay signal collected progress Fourier transform is obtained Hydrogen Proton in water and fat and resonated by magnetic resonance system
The frequency spectrum of frequency distribution；Magnetic resonance system obtains actual fat according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
The resonant frequency distribution situation of Hydrogen Proton simultaneously matches fat saturation pulse；The fatty saturation that magnetic resonance system is obtained using matching
Pulse carries out fatty saturation, so as to suppress the generation of fat signal, generates the fat suppression image of magnetic resonance.The present invention is according to reality
The resonant frequency distribution situation of border fat Hydrogen Proton applies the fat saturation pulse of different bandwidth and centre frequency, passes through fat
Fat saturation pulse carries out the suppression of fat signal, so as to obtain the obvious MRI of fat suppression effect.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of image processing method for suppressing fat signal, it is characterised in that comprise the following steps：
The free induction decay signal collected progress Fourier transform is obtained hydrogen in water and fat by step A, magnetic resonance system
The frequency spectrum of Proton Resonance Frequency distribution；
Step B, magnetic resonance system obtain actual fat hydrogen matter according to Hydrogen Proton resonant frequency spread spectrum analysis in water and fat
The resonant frequency distribution situation of son simultaneously matches fat saturation pulse；
The fat saturation pulse that step C, magnetic resonance system are obtained using matching carries out fatty saturation, so as to suppress fat signal
Produce, generate the fat suppression image of magnetic resonance.
2. the image processing method according to claim 1 for suppressing fat signal, it is characterised in that the step A is specific
Including：
Step A1, magnetic resonance system advance with shim coil and carry out 3D automatic shimmings；
Step A2, magnetic resonance system collect free induction decay signal and carry out Fourier transform after 3D automatic shimmings
Obtain the frequency spectrum that Hydrogen Proton resonant frequency is distributed in water and fat.
3. the image processing method according to claim 1 for suppressing fat signal, it is characterised in that the step B is specific
Including：
The spectrum analysis that step B1, magnetic resonance system are distributed according to Hydrogen Proton resonant frequency in water and fat obtains actual fat hydrogen
The resonant frequency distribution situation of proton；
The fat that step B2, magnetic resonance system are actually needed according to the resonant frequency distribution situation analysis of actual fatty Hydrogen Proton
The bandwidth and centre frequency of fat saturation pulse；
The bandwidth and centre frequency of the fat saturation pulse of step B3, magnetic resonance system according to actual needs, Auto-matching go out most
Close to the fat saturation pulse of actual fatty Hydrogen Proton resonant frequency bandwidth.
4. the image processing method according to claim 1 for suppressing fat signal, it is characterised in that before the step B
Also include：Fat saturation pulse and the storage of 21 different bandwidths, and the fatty saturation are set in magnetic resonance system in advance
The bandwidth range of pulse differs 10 hertz between 250 hertz to 450 hertz, each fat saturation pulse；The step B3 tools
Body also includes：Step B31, magnetic resonance system are matched and are actually needed from the fat saturation pulse of 21 different bandwidths
Fat saturation pulse bandwidth and the immediate fat saturation pulse of centre frequency.
5. the image processing method according to claim 1 for suppressing fat signal, it is characterised in that the step C is specific
Including：
Hydrogen Proton in fat is carried out saturation by the fat saturation pulse that step C1, magnetic resonance system are obtained using matching；
Step C2, when magnetic resonance system complete fat signal process of inhibition after, generate magnetic resonance fat suppression image.
6. the image processing method according to claim 1 for suppressing fat signal, it is characterised in that in the water and fat
The frequency spectrum of Hydrogen Proton resonant frequency distribution includes：The water peak of the Hydrogen Proton formation of water and the fatty peak of the Hydrogen Proton formation of fat；
The distributed image at the water peak and fatty peak is using resonant frequency as X-axis；Hydrogen Proton resonant frequency is distributed in the water and fat
Frequency spectrum also include：Both sides baseline position at the fatty peak is placed between two mark lines, and two mark lines respectively
Distance is that the frequency at center between the bandwidth at the fatty peak, two mark lines is the centre frequency at the fatty peak.
7. a kind of image processing apparatus for suppressing fat signal, it is characterised in that described device includes：
Signal acquisition module, for controlling magnetic resonance system to obtain the free induction decay signal collected progress Fourier transform
The frequency spectrum that Hydrogen Proton resonant frequency is distributed into water and fat；
Pulse matching module, for controlling magnetic resonance system to be analyzed according to Hydrogen Proton resonant frequency spread spectrum in water and fat
To actual fatty Hydrogen Proton resonant frequency distribution situation and match fat saturation pulse；
Image generation module, for controlling the fat saturation pulse that magnetic resonance system is obtained using matching to carry out fatty saturation, from
And suppress the generation of fat signal, generate the fat suppression image of magnetic resonance.
8. the image processing apparatus according to claim 7 for suppressing fat signal, it is characterised in that the signal acquisition mould
Block is specifically included：
Automatic shimming unit, 3D automatic shimmings are carried out for controlling magnetic resonance system to advance with shim coil；
Signal acquisition and converter unit, for controlling magnetic resonance system after 3D automatic shimmings, collect free induction decay
Signal simultaneously carries out the frequency spectrum that Fourier transform obtains Hydrogen Proton resonant frequency distribution in water and fat.
9. the image processing apparatus according to claim 7 for suppressing fat signal, it is characterised in that the pulse matching mould
Block is specifically included：
Spectral analysis unit, for controlling magnetic resonance system according to the spectrum analysis that Hydrogen Proton resonant frequency is distributed in water and fat
Obtain the resonant frequency distribution situation of actual fat Hydrogen Proton；
Pulse processing unit, for controlling magnetic resonance system to be analyzed according to the resonant frequency distribution situation of actual fatty Hydrogen Proton
To the bandwidth and centre frequency of the fat saturation pulse being actually needed；
Automatic matching unit, for control the fat saturation pulse of magnetic resonance system according to actual needs bandwidth and center frequently
Rate, Auto-matching goes out the fat saturation pulse closest to actual fatty Hydrogen Proton resonant frequency bandwidth.
10. the image processing apparatus according to claim 7 for suppressing fat signal, it is characterised in that described image is generated
Module is specifically included：
Hydrogen Proton saturation unit, for controlling magnetic resonance system using the obtained fat saturation pulse of matching by the Hydrogen Proton in fat
Carry out saturation；
Signal suppresses and image generation unit, for controlling after magnetic resonance system completes fat signal process of inhibition, to generate magnetic
The fat suppression image of resonance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710221041.7A CN106952261B (en) | 2017-04-06 | 2017-04-06 | A kind of image processing method and device inhibiting fat signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710221041.7A CN106952261B (en) | 2017-04-06 | 2017-04-06 | A kind of image processing method and device inhibiting fat signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106952261A true CN106952261A (en) | 2017-07-14 |
| CN106952261B CN106952261B (en) | 2019-11-22 |
Family
ID=59474086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710221041.7A Active CN106952261B (en) | 2017-04-06 | 2017-04-06 | A kind of image processing method and device inhibiting fat signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106952261B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015212A1 (en) * | 2017-07-18 | 2019-01-24 | Shenzhen United Imaging Healthcare Co., Ltd. | Systems and methods for fat suppression in magnetic resonance imaging |
| CN110246568A (en) * | 2018-03-09 | 2019-09-17 | 皇家飞利浦有限公司 | Parallel MR imaging with spectrum fat suppression |
| US10578699B2 (en) | 2017-07-18 | 2020-03-03 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for fat suppression in magnetic resonance imaging |
| CN111460934A (en) * | 2020-03-18 | 2020-07-28 | 深圳市贝斯达医疗股份有限公司 | Method and system for calculating center frequency of superconducting high-field magnetic resonance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396265A (en) * | 2007-09-28 | 2009-04-01 | 株式会社东芝 | Magnetic resonance imaging apparatus and analysis method for fat suppression effect in magnetic resonance imaging apparatus |
| CN101744616A (en) * | 2008-12-19 | 2010-06-23 | Ge医疗系统环球技术有限公司 | Transmitting frequency calibration method for chemical saturation in MRI and MRI system |
| CN102639055A (en) * | 2010-10-19 | 2012-08-15 | 株式会社东芝 | Magnetic resonance imaging apparatus and magnetic resonance imaging method |
| CN103592609A (en) * | 2012-08-17 | 2014-02-19 | 西门子公司 | Automated spectral fat saturation |
| CN106137194A (en) * | 2015-03-27 | 2016-11-23 | 上海联影医疗科技有限公司 | A kind of self adaptation pressure fat pulse parameter system of selection and device |
| CN106466182A (en) * | 2015-08-18 | 2017-03-01 | 上海联影医疗科技有限公司 | MR imaging method and system |
-
2017
- 2017-04-06 CN CN201710221041.7A patent/CN106952261B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396265A (en) * | 2007-09-28 | 2009-04-01 | 株式会社东芝 | Magnetic resonance imaging apparatus and analysis method for fat suppression effect in magnetic resonance imaging apparatus |
| CN101744616A (en) * | 2008-12-19 | 2010-06-23 | Ge医疗系统环球技术有限公司 | Transmitting frequency calibration method for chemical saturation in MRI and MRI system |
| CN102639055A (en) * | 2010-10-19 | 2012-08-15 | 株式会社东芝 | Magnetic resonance imaging apparatus and magnetic resonance imaging method |
| CN103592609A (en) * | 2012-08-17 | 2014-02-19 | 西门子公司 | Automated spectral fat saturation |
| CN106137194A (en) * | 2015-03-27 | 2016-11-23 | 上海联影医疗科技有限公司 | A kind of self adaptation pressure fat pulse parameter system of selection and device |
| CN106466182A (en) * | 2015-08-18 | 2017-03-01 | 上海联影医疗科技有限公司 | MR imaging method and system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019015212A1 (en) * | 2017-07-18 | 2019-01-24 | Shenzhen United Imaging Healthcare Co., Ltd. | Systems and methods for fat suppression in magnetic resonance imaging |
| US10578699B2 (en) | 2017-07-18 | 2020-03-03 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for fat suppression in magnetic resonance imaging |
| CN110246568A (en) * | 2018-03-09 | 2019-09-17 | 皇家飞利浦有限公司 | Parallel MR imaging with spectrum fat suppression |
| CN111460934A (en) * | 2020-03-18 | 2020-07-28 | 深圳市贝斯达医疗股份有限公司 | Method and system for calculating center frequency of superconducting high-field magnetic resonance |
| CN111460934B (en) * | 2020-03-18 | 2023-09-29 | 深圳市贝斯达医疗股份有限公司 | Center frequency calculation method and system for superconducting high-field magnetic resonance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106952261B (en) | 2019-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106952261A (en) | A kind of image processing method and device for suppressing fat signal | |
| FI88076C (en) | SIMULTANT NMR-BILDVISNINGSSYSTEM | |
| CN104545914B (en) | Method for separate imaging of water and fat and system | |
| JPS60168041A (en) | Nmr picture forming method | |
| WO2015190508A1 (en) | Magnetic resonance imaging device and method for creating water-fat separation image | |
| JP2016520395A (en) | MR imaging with enhanced susceptibility contrast | |
| US8384382B2 (en) | Magnetic resonance imaging apparatus | |
| CN105496410B (en) | Brain longitudinal relaxation value measurement method and device | |
| CN102651043A (en) | Hybrid design method for radio frequency coil | |
| JP2007054214A5 (en) | ||
| Choraś | Time-frequency analysis of image based on stockwell transform | |
| KR102483327B1 (en) | MRI noise control method and apparatus | |
| JPS60100747A (en) | Method and system of improved nmr imaging | |
| Bhaskar et al. | FPGA implementation of non-subsampled Shearlet transform for image fusion | |
| JP4031092B2 (en) | Magnetic resonance diagnostic equipment | |
| JP3842607B2 (en) | Spectral estimation method and magnetic resonance imaging apparatus | |
| JP6696639B2 (en) | Frequency measuring device, frequency measuring method and frequency measuring program | |
| Zhao et al. | The influence on acoustic frequency characteristics of conductivity gradual-varying tissue in magnetoacoustic tomography (MAT) | |
| JP3431989B2 (en) | Inspection equipment using nuclear magnetic resonance | |
| Idiyatullin et al. | Sweep imaging with fourier transformation (SWIFT) | |
| CN113933332B (en) | Fat pressing method for magnetic resonance spectrum imaging | |
| JP2008229048A (en) | Skin evaluation method | |
| Ando et al. | 2-D finite difference analyses of Schumann resonance and identification of lightning distribution | |
| Güngör et al. | A synthesis-based approach to compressive multi-contrast magnetic resonance imaging | |
| JP3120111B2 (en) | High-speed magnetic resonance imaging system using single excitation spin echo |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |