CN101683276B - Doppler signal gap filling method, device and ultrasound imaging system - Google Patents
Doppler signal gap filling method, device and ultrasound imaging system Download PDFInfo
- Publication number
- CN101683276B CN101683276B CN 200810216405 CN200810216405A CN101683276B CN 101683276 B CN101683276 B CN 101683276B CN 200810216405 CN200810216405 CN 200810216405 CN 200810216405 A CN200810216405 A CN 200810216405A CN 101683276 B CN101683276 B CN 101683276B
- Authority
- CN
- China
- Prior art keywords
- gap
- doppler signal
- signal
- filling
- backward
- 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.)
- Active
Links
Images
Abstract
The invention discloses a Doppler signal gap filling method, device and ultrasound imaging system comprising the device. The method mainly includes a search step and a mapping step. According to the Doppler signal gap filling method, device and ultrasound imaging system comprising the device of the embodiment of the invention, the filled Doppler signal can be ensured to have no phase mutation, the Doppler signal is more continuous, and Doppler imaging quality in synchronous display is improved. In addition, the gap is filled by front and back data symmetrical mapping, and one signal is negated to ensure orthogonality of data, thus eliminating mirror image produced in filling.
Description
Technical field
The present invention relates to a kind of Doppler signal gap filling method for the multi-mode ultrasonic image-forming system and device, and the ultrasonic image-forming system that comprises this device.
Background technology
Modern medical ultrasound imaging diagnostic system is integrated a plurality of imaging patterns usually, shows simultaneously multiple content measurement, such as can showing simultaneously two-dimentional Type B image and Doppler frequency spectrum figure, or simultaneous display Doppler frequency spectrum figure and color blood-stream image, so that diagnosis.Yet Doppler scanning can be interrupted by Type B or color flow angiography scanning midway in this system, causes loss of data, forms the gap, causes the spectrum misjudgment, and Doppler's audio discontinuity.
Figure 1 shows that the DOPPLER ULTRASOUND SIGNAL processing system.Ultrasound echo signal forms rf echo signal after wave beam is synthetic, resolve into two paths of signals through demodulation module again: phase component I (In-phase component) signal and quadrature component Q (quadrate component) signal.Then, in the continuous wave Doppler system, this I, Q two paths of signals directly enter the wall filtering processing links; This I, Q two-way component are respectively through range gating in the Pulsed-Wave Doppler system, and namely cumulative within the specific time period, this cumulative time period and pulse Doppler transmitted pulse are all selected according to practical situation by the operator, enter the wall filtering processing links again.Described wall filtering is a high pass filter, can filtering by clutter static or that the microinching tissue causes.I, Q two paths of signals after this link is processed consist predominantly of the kinetic echo of erythrocyte, are sent to the power Spectral Estimation module, and this module generally adopts fast fourier transform (FFT) to come the estimated power spectrum.Because the power spectrum dynamic range that estimates is too large, need to process through overcompression, to be compressed to the gray scale indication range.What the Doppler frequency spectrum figure that shows at screen at last represented is certain moment, certain speed, i.e. the power spectrum intensity of certain frequency shift (FS).System can also comprise automatic envelope detected module, to the data analysis after the spectrum compression, with from motion tracking blood stream peaks speed and average speed over time, and shows in real time on Doppler frequency spectrum figure.In addition, I, Q two paths of signals behind the described process wall filtering can also be sent to the acoustic processing module, with formation positive blood flow and inverse blood flow two-way voice data, and are sent to speaker respectively after the D/A module converts, produce forward and inverse blood flow sound.
Simultaneously during simultaneous display, ultrasonic system generally adopts the mode of quick switching between two-dimentional B-scan and Doppler scanning to realize at doppler imaging and Type B or color blood-stream image.But this mode can produce following shortcoming; When carrying out B image scanning, Doppler signal is lost because Doppler scanning interrupts, and forms the gap, occurs discontinuous at Doppler frequency spectrum figure and Doppler's sound.
As shown in Figure 2, solid line represents non-gap Doppler scanning, and dotted line represents the B scanning of off time.Within off time, there is not Doppler signal, carry out conventional Doppler signal this moment and process, can cause the interrupted of Doppler spectrogram, Doppler's sound also can interrupt simultaneously.Therefore in the ultrasonic synchronous display system of multi-mode, general adopt the method that the gap is filled to remedy because the Doppler spectrogram that the gap causes or sound vision and acoustically discontinuous.
According to a kind of prior art, the method that adopt to stretch is filled the gap in the Doppler frequency spectrum, and every the frequency spectrum that calculates in the time of namely will be near the gap repeats to show fills the gap twice.Doppler signal during the non-gap of employing direct repeat is filled the gap, and is more satisfactory to the filling effect of sound, acoustically imperceptible interruption; But, not ideal to the visual effect that Doppler frequency spectrum figure fills.When Doppler frequency spectrum figure was more or less the same before and after the gap, effect can be quite a lot of.But when differing larger for front and back, gap Doppler frequency spectrum figure, adopt the method that stretches to see obvious sudden change in the junction that stretches.
According to another kind of prior art, the data that a kind of method of utilizing autoregression model and interpolation is estimated gap location have been proposed, carry out gap-fill from the angle of time domain, and then carry out sound spectrogram and Doppler's sound calculates.But, the orthogonality of I, Q two paths of data behind the very difficult assurance of the method gap-fill, thus make spectrogram produce mirror image.In addition, the exponent number of autoregression model is set very large to the gap-fill influential effect, is easy to produce situation about not restraining.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art existence, a kind of Doppler signal gap filling method and device are provided, it can guarantee the seriality of gap and non-gap location signal phase, thereby improve the accuracy that spectrum is estimated, make Doppler's spectrogram and Doppler's sound more continuous, show when realizing multi-mode ultrasonic system doppler imaging and two-dimensional imaging.
According to the first aspect of the embodiment of the invention, a kind of Doppler signal gap filling method is provided, comprising: search step is used for the forward and backward peak of search Doppler signal gap; And mapping step, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping; Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
According to the second aspect of the embodiment of the invention, a kind of Doppler signal gap filling device is provided, comprising: search module is used for the forward and backward peak of search Doppler signal gap; And mapping block, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping; Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
According to the third aspect of the embodiment of the invention, a kind of ultrasonic image-forming system is provided, comprise the Doppler signal gap filling device according to embodiment of the invention second aspect.
Employing is according to Doppler signal gap filling method and the device of the embodiment of the invention and the ultrasonic image-forming system that comprises this device, Doppler signal phase place after can guaranteeing to fill is sudden change not, make Doppler signal more continuous, the doppler imaging quality when improving simultaneous display.In addition, fill the gap by the method for the forward and backward signal symmetry in gap mapping, and one road signal negate has wherein been eliminated and filled the mirror image that produces to guarantee the orthogonality of signal.
Below in conjunction with accompanying drawing and by specific embodiment the present invention is further specified.
Description of drawings
Fig. 1 is that DOPPLER ULTRASOUND SIGNAL of the prior art is processed block diagram;
Fig. 2 is the multiple mode scanning sketch map;
Fig. 3 is the Doppler signal gap filling method flow chart according to the embodiment of the invention;
Fig. 4 fills sketch map according to the Doppler signal gap of the embodiment of the invention;
Fig. 5 is the symmetrical mapping sketch map, and wherein (a) is the sketch map that directly overturns, and (b) is peak value upset sketch map;
Fig. 6 is the peak value searching sketch map according to the embodiment of the invention;
Fig. 7 is the Doppler signal gap filling device block diagram according to the embodiment of the invention;
Fig. 8 is the partial block diagram according to the ultrasonic image-forming system that comprises the Doppler signal gap filling device of the embodiment of the invention.
The specific embodiment
As shown in Figure 3, the Doppler signal gap filling method according to present embodiment mainly comprises search step 302 and mapping step 304.Wherein search step 302 is used for the forward and backward peak of search Doppler signal gap; In mapping step 304, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping; Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
In addition, the Doppler signal gap filling method according to present embodiment also comprises correction step 300, weighting step 306 and filter step 308 alternatively.Wherein revising step 300 is used for shortening the transient response time of the Doppler signal before filling by initializing wall filter, forward and reverse filtering or regression filtering; Weighting step 306 is used for stitching position forward and backward filling signal in gap is weighted processing, so that Doppler signal keeps continuously; Filter step 308 is used for the Doppler signal after filling is carried out conventional wall filtering.
The below is to being elaborated according to each step in the method for present embodiment.Overall thought according to the method for present embodiment is: at first shorten the wall filtering transient effect by initializing wall filter, then by the data symmetrical mapping before and after the gap is carried out gap-fill, continuous for guaranteeing the gap data phase place, the nearest peak point that the symmetrical mapping center selects the single channel data peaks search of front and back, gap to find, and to another circuit-switched data symmetrical mapping negate to guarantee orthogonality, process to guarantee simultaneously the seriality of crossover position by weighting.
Echo data after the reception (being signal) after the synthetic and quadrature demodulation, obtains I road and Q circuit-switched data through wave beam.At first, I road and Q circuit-switched data being carried out wall filtering processes with filtering by clutter static or that the microinching tissue causes.Especially, be different from the wall filtering of conventional Doppler signal in processing, the wave filter during gap-fill need to carry out initialization process, and its reason is that all can there be the transient response of a period of time in any one wave filter, i.e. the initial one piece of data of filtering is invalid.And in the multimode operation situation, the filtering in each intersegmental crack, all can bring the gap after one piece of data be in wave filter transient response position, thereby cause data invalid.In this case, wave filter transient response time segment data can not participate in calculating as valid data, must be rejected, otherwise can cause larger error.Like this, the doppler data gap has just comprised because the gap that other Mode scans cause and because the gap that wall filtering transient response causes.When wall filtering adopted iir filter, transient response time can reach tens times of iir filter exponent number, thereby the caused gap of wall filtering transient response is very large.For shortening the length of invalid data, need to necessarily revise to shorten transient response time to wall filter.The method that shortens transient response can be to initialize wave filter, also can be forward and reverse filtering, the methods such as regression filtering.Like this, according to the continuous-wave doppler scanning times of default and off time length, design suitable wall filtering initializer with shortening wave filter transient effect, thereby reduce the length of invalid data, also just shortened the gap that causes because of wall filtering transient response.
Subsequently, filtered data are begun to carry out gap-fill, fill sketch map as shown in Figure 4.Wherein Doppler scanning is interrupted by B scanning, and whole gap length L is made of gap length L1 and the caused gap L 2 of wall filtering transient response that B scanning causes.What gap-fill adopted is the mode of symmetrical mapping, namely the data before the gap is overturn to fill gap first half section, and the data after the gap are overturn to fill the gap second half section.In order to guarantee to fill the seriality of phase place, the present embodiment peak (i.e. first peak) nearest to filtered the data is as the symmetrical mapping center, can certainly adopt second, third peak etc., but preferentially be to adopt the first peak.Fig. 5 has provided the sketch map of two kinds of symmetrical mapping, therefrom can find out, direct symmetrical mapping method phase place shown in Fig. 5 a exists very large saltus step, there is larger phase shift in whole rear segment data simultaneously, compose so again raising of broadening that estimation can cause main lobe and secondary lobe, and the method in peak place symmetrical mapping shown in Fig. 5 b can guarantee the seriality of its splice point position and follow-up data phase place, thereby guarantees the accuracy that spectrum is estimated.
Like this, filtered data are at first delivered to the peak value searching link, to each interstitial site, search for forward nearest signal peak position M1, search for backward nearest signal peak position M2.The method of data shown in Figure 6 being carried out peak value searching is to treat search data to carry out difference processing, and the adjacent data symbol is identical after the difference counts peak, and namely the point of Fig. 6 fullness in the epigastrium and abdomen foot formula is thought peak point:
(X
n-X
n-m)(X
n-X
n+m)>0，
Wherein, the exponent number of difference can 1 or 2, for guaranteeing the stability of algorithm, generally elect 2 as.In addition, be the stability of assurance algorithm, and do not search local peaking, can carry out carrying out again peak value searching after the low-pass filtering to data.
Aforesaid peak value searching method can be to I road or the independent search of Q circuit-switched data, also can make two-way search for simultaneously rear searching minima.Specifically, in the situation of roving commission, to the in-phase component signal that obtains by quadrature demodulation and the forward and backward peak of wherein one tunnel search Doppler signal gap of orthogonal component signal, and carry out symmetrical mapping and filling; To another road signal in in-phase component signal and the orthogonal component signal shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.And when the in-phase component signal that obtains by quadrature demodulation and orthogonal component signal searched for the forward and backward peak of Doppler signal gap simultaneously, get peak wherein apart from nearest a road the shining upon and fill in gap, another road shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.It should be noted that, because the orthogonality of two paths of data, the peak value of one circuit-switched data is that another circuit-switched data phase place is 0 position just, therefore, after a circuit-switched data peak symmetrical mapping, another circuit-switched data should be carried out the orthogonality that negate processes to guarantee its seriality and two paths of data after getting symmetrical mapping again.
As shown in Figure 4, S0 is the doppler data before and after the gap, and S0 ' is forward direction symmetrical mapping data, is used for filling gap leading portion, S0 " be backward symmetrical mapping data, be used for filling the gap back segment.At this moment, if there is little deviation in peak estimation, the time period that may begin and finish in the gap, there is the doppler data non-continuous event, simultaneously, also can there be the discontinuous phenomenon of doppler data in the stitching position of data before and after the stage casing, gap.Continuous for guaranteeing these phase places of filling the discontinuous position of splice point, can adopt weighting to process to make it continuously level and smooth.For example, make the front doppler data of discontinuity point converge to progressively zero, the doppler data behind the discontinuity point begins to increase by zero progressively, thereby can keep the seriality of doppler data.Shown in Fig. 4 lower middle portion, doppler data before and after three stitching positions is processed with the window function weighting respectively, make doppler data be able to keep continuously at this, window function is chosen as Hanning window etc.
Data after weighting is filled are delivered to conventional wall filtering link and are carried out a low frequency component filtering again, then deliver to the links such as spectrum estimation and acoustic processing, and these contents are not at this repeated description.
In the ultra sonic imaging diagnostic system that adopts this method, the implementation step may be summarized as follows:
1. gap length reasonable in design and ratio are launched the synthetic processing of reception and wave beam accordingly, and I is obtained in quadrature demodulation, Q two-way receive data.
2. initialize wall filter according to System Parameter Design, carry out wall filtering by the gap piecemeal and process.
3. to an interstitial site, data first peak M1 and M2 before and after one tunnel gap among Searching I, the Q.
4. this circuit-switched data of peak value searching is carried out symmetrical mapping, and the symmetrical mapping of another circuit-switched data is carried out negate.
5. weighting is processed to gap splicing crossover position, obtains to fill the result.
6. the data after filling are carried out once conventional wall filtering, deliver to the modules such as follow-up spectrum estimation.
As above provided multi-mode ultrasonic system doppler data gap-fill overall process, the method can effectively be improved the gap that causes because of signal interruption, make Doppler signal more continuous, the signal processing that further carries out according to continuous Doppler signal after filling, can make Doppler frequency spectrum figure and Doppler's sound more continuous, doppler imaging quality when improving simultaneous display, thus support the multi-mode ultrasonic scanning system to realize at lower cost simultaneous display.
As shown in Figure 7, the Doppler signal gap filling device according to present embodiment mainly comprises search module 702 and mapping block 704.Wherein search module 702 is used for the forward and backward peak of search Doppler signal gap; In mapping block 704, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping; Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
In addition, the Doppler signal gap filling method according to present embodiment also comprises correcting module 700, weighting block 706 and filtration module 708 alternatively.Wherein correcting module 700 is used for shortening the transient response time of the Doppler signal before filling by initializing wall filter, forward and reverse filtering or regression filtering; Weighting block 706 is used for stitching position forward and backward filling signal in gap is weighted processing, so that Doppler signal keeps continuously; Filtration module 708 is used for the Doppler signal after filling is carried out conventional wall filtering.
Fig. 8 is the partial block diagram that comprises according to the ultra sonic imaging diagnostic system of the Doppler signal gap filling device of embodiment.Ultrasound echo signal resolves into I and Q two paths of signals through wave beam after the synthetic and quadrature demodulation, (also can be forward and reverse filtering by initializing wave filter, regression filtering etc.) I and Q two paths of signals are carried out the wall filtering processing, then enter search module, mapping block, weighting block and filtration module and carry out gap-fill.Then, the signal of filling is further processed.
More than describe the present invention by specific embodiment, but the present invention is not limited to these specific embodiments.The present invention not only can be used for simultaneously synchronous display system of doppler imaging and Type B or color blood-stream image, also can be used for simultaneously display system of Type B, C type and three kinds of imaging patterns of Doppler.It will be understood by those skilled in the art that and can also make various modifications to the present invention, be equal to replacement, change etc., still, as long as do not deviate from spirit of the present invention, all should be within protection scope of the present invention.
Claims (20)
1. a Doppler signal gap filling method is characterized in that, comprising:
Search step is used for the forward and backward peak of search Doppler signal gap; And
Mapping step, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping;
Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
2. Doppler signal gap filling method as claimed in claim 1 is characterized in that, also comprises:
The weighting step is used for stitching position forward and backward filling signal in gap is weighted processing, so that the Doppler signal of filling keeps continuously.
3. Doppler signal gap filling method as claimed in claim 2, it is characterized in that: by making the Doppler signal asymptotic convergence of filling before the stitching position of gap to zero, the Doppler signal of filling after the stitching position of gap keeps Doppler signal continuous by zero progressive increase.
4. Doppler signal gap filling method as claimed in claim 2 is characterized in that: use window function that stitching position forward and backward signal in gap is weighted processing.
5. Doppler signal gap filling method as claimed in claim 1 is characterized in that, also comprises:
Revise step, be used for shortening the transient response time of the Doppler signal before filling by initializing wall filter, forward and reverse filtering or regression filtering.
6. Doppler signal gap filling method as claimed in claim 1 is characterized in that, also comprises:
Filter step is used for the Doppler signal after filling is carried out conventional wall filtering.
7. such as each described Doppler signal gap filling method in the claim 1 to 6, it is characterized in that: in described search step, the Doppler signal forward and backward to the gap carries out respectively difference processing, is peak with the location positioning that the adjacent data symbol is identical after the difference.
8. such as each described Doppler signal gap filling method in the claim 1 to 6, it is characterized in that: to the in-phase component signal that obtains by quadrature demodulation and the forward and backward peak of wherein one tunnel search Doppler signal gap of orthogonal component signal, and carry out symmetrical mapping and filling; To another road signal in in-phase component signal and the orthogonal component signal shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.
9. such as each described Doppler signal gap filling method in the claim 1 to 6, it is characterized in that: the in-phase component signal and the orthogonal component signal that obtain by quadrature demodulation are searched for the forward and backward peak of Doppler signal gap simultaneously, and get peak wherein apart from nearest a road the shining upon and fill in gap, another road shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.
10. such as each described Doppler signal gap filling method in the claim 1 to 6, it is characterized in that: first forward and backward peak of search Doppler signal gap in search step.
11. a Doppler signal gap filling device is characterized in that, comprising:
Search module is used for the forward and backward peak of search Doppler signal gap; And
Mapping block, the peak forward and backward take the gap of being searched for is the mapping center, respectively the forward and backward Doppler signal in gap carried out the forward and backward symmetrical mapping;
Wherein utilize the leading portion in the Doppler signal filling gap of forward direction symmetrical mapping, utilize the back segment in the Doppler signal filling gap of backward symmetrical mapping.
12. Doppler signal gap filling device as claimed in claim 11 is characterized in that, also comprises:
Weighting block is used for stitching position forward and backward filling signal in gap is weighted processing, so that the Doppler signal of filling keeps continuously.
13. Doppler signal gap filling device as claimed in claim 12, it is characterized in that: described weighting block is by making the Doppler signal asymptotic convergence of filling before the stitching position of gap to zero, the Doppler signal of filling after the stitching position of gap keeps Doppler signal continuous by zero progressive increase.
14. Doppler signal gap filling device as claimed in claim 12 is characterized in that: described weighting block uses window function that stitching position forward and backward filling signal in gap is weighted processing.
15. Doppler signal gap filling device as claimed in claim 11 is characterized in that, also comprises:
Correcting module is used for shortening the transient response time of the Doppler signal before filling by initializing wall filter, forward and reverse filtering or regression filtering.
16. Doppler signal gap filling device as claimed in claim 11 is characterized in that, also comprises:
Filtration module is used for the Doppler signal after filling is carried out conventional wall filtering.
17. such as each described Doppler signal gap filling device in the claim 11 to 16, it is characterized in that: described search module carries out respectively difference processing to the forward and backward Doppler signal in gap, is peak with the location positioning that the adjacent data symbol is identical after the difference.
18. such as each described Doppler signal gap filling device in the claim 11 to 16, it is characterized in that: to the in-phase component signal that obtains by quadrature demodulation and the forward and backward peak of wherein one tunnel search Doppler signal gap of orthogonal component signal, and carry out symmetrical mapping and filling; To another road signal in in-phase component signal and the orthogonal component signal shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.
19. such as each described Doppler signal gap filling device in the claim 11 to 16, it is characterized in that: described search module is searched for the forward and backward peak of Doppler signal gap simultaneously to the in-phase component signal and the orthogonal component signal that obtain by quadrature demodulation, and get peak wherein apart from nearest a road the shining upon and fill in gap, another road shine upon take correspondence position as the symmetrical mapping centrosymmetry and negate after fill.
20. a ultrasonic image-forming system is characterized in that, comprises each described Doppler signal gap filling device in the claim 11 to 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810216405 CN101683276B (en) | 2008-09-26 | 2008-09-26 | Doppler signal gap filling method, device and ultrasound imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810216405 CN101683276B (en) | 2008-09-26 | 2008-09-26 | Doppler signal gap filling method, device and ultrasound imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101683276A CN101683276A (en) | 2010-03-31 |
| CN101683276B true CN101683276B (en) | 2013-04-24 |
Family
ID=42046831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810216405 Active CN101683276B (en) | 2008-09-26 | 2008-09-26 | Doppler signal gap filling method, device and ultrasound imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101683276B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190365357A1 (en) * | 2016-11-09 | 2019-12-05 | Edan Instruments, Inc. | Systems and methods for temporal persistence of doppler spectrum |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1915174A (en) * | 2005-08-16 | 2007-02-21 | 深圳迈瑞生物医疗电子股份有限公司 | Method for processing gaps of Doppler signal |
-
2008
- 2008-09-26 CN CN 200810216405 patent/CN101683276B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1915174A (en) * | 2005-08-16 | 2007-02-21 | 深圳迈瑞生物医疗电子股份有限公司 | Method for processing gaps of Doppler signal |
Non-Patent Citations (1)
| Title |
|---|
| 高清维等.《基于对称延拓的DFT频谱泄漏抑制方法》.《安徽大学学报》.2000,第24卷(第2期),65-68. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101683276A (en) | 2010-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7611464B2 (en) | Method for processing Doppler signal gaps | |
| Gastounioti et al. | Comparison of Kalman-filter-based approaches for block matching in arterial wall motion analysis from B-mode ultrasound | |
| US20050215897A1 (en) | Image data processing method and apparatus for ultrasonic diagnostic apparatus, and image processing apparatus | |
| US20090012398A1 (en) | Method and apparatus for filling doppler signal gaps in ultrasound diagnostic imaging | |
| CN102727255B (en) | Method and device for ultrasonic image space compound imaging | |
| JP2003515423A (en) | Ultrasound image processing method and system for displaying a composite image sequence of artery segments | |
| JP6242025B2 (en) | Ultrasonic imaging apparatus and ultrasonic image display method | |
| JP2003245279A (en) | Method and apparatus for automatically controlling spectral doppler imaging | |
| CN105590315B (en) | A kind of ultrasonic color doppler image post-processing approach | |
| WO2007108359A1 (en) | Ultrasonograph | |
| JP2001286472A (en) | Ultrasonic diagnostic apparatus | |
| JP4094317B2 (en) | Ultrasonic diagnostic equipment | |
| WO2012171388A1 (en) | Method and device for detecting displacement in elastography | |
| US7153268B2 (en) | Motion adaptive frame averaging for ultrasound doppler color flow imaging | |
| CN105476665A (en) | Ultrasonic-based blood flow velocity measurement method and blood flow measurement method | |
| CN106580372A (en) | Pulse repetition frequency adjusting method and device for ultrasonic color blood flow imaging | |
| US8162838B2 (en) | Doppler signal spectrum calculating method and apparatus | |
| KR20100119387A (en) | Ultrasound system and method for processing color doppler mode image | |
| US8545411B2 (en) | Ultrasound system and method for adaptively performing clutter filtering | |
| CN101683276B (en) | Doppler signal gap filling method, device and ultrasound imaging system | |
| JP2008000583A (en) | Image interpolation method, image interpolation device, and ultrasonic diagnostic system | |
| JP2000342585A (en) | Ultrasonic diagnostic device | |
| US20100149920A1 (en) | Clutter Signal Filtering For Doppler Signal | |
| US20050090747A1 (en) | Automatic alias avoidance for doppler audio | |
| JP4067914B2 (en) | Ultrasonic diagnostic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100331 Assignee: Shenzhen Mindray Animal Medical Technology Co.,Ltd. Assignor: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Contract record no.: X2022440020009 Denomination of invention: Doppler signal gap filling method and device and ultrasonic imaging system Granted publication date: 20130424 License type: Common License Record date: 20220804 |
|
| EE01 | Entry into force of recordation of patent licensing contract |