CN103519840B - Multi-beam pulse inversion imaging method and system - Google Patents
Multi-beam pulse inversion imaging method and system Download PDFInfo
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- CN103519840B CN103519840B CN201210231622.6A CN201210231622A CN103519840B CN 103519840 B CN103519840 B CN 103519840B CN 201210231622 A CN201210231622 A CN 201210231622A CN 103519840 B CN103519840 B CN 103519840B
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Abstract
The invention discloses a multi-beam pulse inversion imaging method and a multi-beam pulse inversion imaging system. The method comprises the following steps: step S1, the emitter divides the emitted scanning lines into odd and even groups, and controls the emitting lines of one group to emit positive polarity or negative polarity pulse, and the other group to emit reversed phase pulse; in step S2, after receiving the reception beams corresponding to the scan lines transmitted in step S1, the receiver performs summation processing on the actual reception beams corresponding to the desired reception beams that are overlapped in spatial position, thereby obtaining harmonic signals. The method and the device simultaneously achieve the purposes of beam distortion correction and harmonic signal acquisition, and reduce the complexity of echo signal processing.
Description
Technical field
The present invention relates to medical ultrasound image technical field, particularly relate to a kind of multi-beam pulse inversion formation method and system.
Background technology
Harmonic imaging, by launching the fundamental signal of a certain frequency, extracts the high-order harmonic wave composition in Received signal strength, finally forms harmonic image.In Harmonic imaging, system front end is launched fundamental signal and is entered tissue, non-linear due to tissue, and first-harmonic, in communication process, can produce higher harmonic components, can obtain the information with tissue nonlinear correlation.Due to the result that the generation of harmonic wave in tissue is an energy accumulation, therefore in the near field of image, harmonic component is fewer, can reduce the pseudomorphisms such as multiple reflections that echo near field like this.Secondly, the sound-filed simulation of harmonic imaging has less secondary lobe relative to first-harmonic, and therefore the contrast of image can be better; On the other hand, harmonic imaging, relative to first-harmonic, has shorter wavelength, and the resolution of all harmonic imagings can higher than first-harmonic.
Traditional harmonic imaging extracts harmonic component by carrying out filtering to the echo received, and the bandwidth due to principal wave harmonic wave has overlap, no matter therefore take which kind of design of filter to be all difficult to harmonic wave and first-harmonic to make a distinction.Filter bandwidht design is too wide, can introduce the composition of first-harmonic, and final image, by the harmonious wave component of first-harmonic, reduces the advantage of harmonic image; Otherwise filter bandwidht designs too narrow, can harmonic information be lost, also can reduce the quality of harmonic image.People propose a kind of pulse inversion Harmonic imaging, contrary by priority polarity of transmission, two pulses that amplitude is identical, are added by the echo successively received and offset the technology that fundametal compoment strengthens harmonic component, be widely used in tissue harmonic imaging.Pulse inversion imaging technique, relative to common tissue harmonic imaging, has stronger rejection ability to first-harmonic, and therefore image has better contrast and signal to noise ratio.
Pulse inversion technique can improve the picture quality of harmonic imaging, but owing to successively will launch twice on same scanning line, after therefore adopting pulse inversion technique, the frame frequency of image will reduce by half.
In order to improve the frame frequency of pulse inversion imaging, multi-beam reception technique is widely used.So-called multi-beam, is exactly that ultrasound emission once just receives synthesis multi-strip scanning line, thus improves frame per second.When ensureing same reception line density by multibeam technique, reduce the number of times launched and improve frame frequency.In fact, multibeam technique is subject to launching and receiving not in the impact of same position, causes the distortion of received beam thus reduces picture quality.Therefore, some compensation techniques must be taked to the quality of the distortion thus raising image that compensate multi-beam.
The current mode taked mostly is the method for space filtering between adjacent lines to compensate multi-beam distortion, but existing method all more complicated, and practicality is not high.And further, it can cause frame frequency to decline further under multifocal, can reduce the harmonic image quality in far field, distortion can be more serious, reduces the quality of image.
Summary of the invention
The invention provides a kind of multi-beam pulse inversion formation method and system, the frame frequency which solving pulse inversion Harmonic imaging reduces, the problems such as multi-beam complicated operation.
The present invention also provides multi-beam pulse inversion formation method and system under a kind of multifocal, and the frame frequency which solving pulse inversion Harmonic imaging reduces, the problems such as multi-beam complicated operation.
The present invention more provides different beams pulse inversion formation method and system under a kind of multifocal, and the frame frequency which solving pulse inversion Harmonic imaging reduces, the problems such as multi-beam complicated operation.
For realizing the pulse inversion formation method of a kind of multi-beam that the object of the invention provides, comprise the steps:
Step S1, the scanning line of transmitting arranges and is divided into odd even two groups by emitter, and the line of departure controlling wherein a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Step S2, receptor after receiving received beam corresponding to scanning line that step S1 launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal.
Preferably, in described step S2, also comprise the steps:
Step S2 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
For realizing a kind of multi-beam pulse inversion imaging system that the object of the invention also provides, comprise emitter and receptor, wherein:
Described emitter comprises first and arranges module, the first control module, wherein:
Described first arranges module, is divided into odd even two groups for being arranged by the scanning line of transmitting;
Described first control module, arranges in two groups of scanning lines of module installation for controlling first, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises first and adds and module, wherein:
Described first adds and module, for after receiving received beam corresponding to scanning line that emitter launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal.
Preferably, described receptor also comprises the first filtration module and first and gives up module, wherein:
Described first filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Described first gives up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
The pulse inversion formation method of multi-beam under a kind of multifocal being also provided for realizing the object of the invention, comprising the steps:
Step S10, the scanning line of transmitting arranges and is divided into odd even two groups by emitter in the i-th transmitting focus, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=2 ..., N, N be more than or equal to 2 positive integer;
Step S20, receptor receive that step S10 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S30, carries out focal point mosaic to the harmonic signal that N number of focus obtains, and obtains final harmonic signal.
Also providing multi-beam pulse inversion imaging system under a kind of multifocal for realizing the object of the invention, comprising emitter and receptor, wherein:
Described emitter comprises second and arranges module, the second control module, wherein:
Described second arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=2 ..., N, N be more than or equal to 2 positive integer;
Described second control module, arranges in two groups of scanning lines of module installation for controlling second, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises second and adds and module and the first concatenation module, wherein:
Described second adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described first concatenation module, for carrying out focal point mosaic to the harmonic signal that N number of focus obtains, obtains final harmonic signal.
The pulse inversion formation method of different beams under a kind of multifocal being also provided for realizing the object of the invention, comprising the steps:
Step S100, emitter carries out different wave beams for different transmitting focuses and controls, according to focus configuration numbers of beams;
Step S200, emitter controls to take simple beam, launches focus launch positive pulse or negative pulse first;
Step S300, emitter controls to launch rp pulse at same position;
Step S400, after receptor receives the echo wave beam of the priority twice emitting of the first transmitting focus that step S200 ~ 300 are launched, launches the focus echo-signal that successively twice emitting produces to first and sums up;
Step S500, emitter configures numbers of beams M in the i-th transmitting focus, arranges and the i-th scanning line launched in focus is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=2 ..., N, N, M be more than or equal to 2 positive integer;
Step S600, receptor receive that step S500 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S700, to the harmonic signal that the first transmitting focus adds and obtains, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
Preferably, described step S600 comprises the steps:
Step S600 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
Preferably, in described step S100, according to focus configuration numbers of beams, refer to and be configured to simple beam in the near field of emitter, in emitter, far field is configured to dualbeam or four wave beams or more wave beam.
Preferably, described emitter carries out different wave beams to different transmitting focuses and controls, and according to focus configuration numbers of beams, is controlled by following engineering parameter:
Focal position [pos
1pos
2pos
n]
Numbers of beams [M
1m
2m
n]
Wherein, M
1=1, M
2=2 ...
Also providing different beams pulse inversion imaging system under a kind of multifocal for realizing the object of the invention, comprising emitter and receptor, wherein:
Described emitter comprises the first configuration module, the 3rd control module, Acanthopanan trifoliatus (L.) Merr. and module, and the 3rd arranges module, the 4th control module, the 4th adds and module, the second concatenation module, wherein:
Described first configuration module, controls for carrying out different wave beams for different transmitting focuses, according to focus configuration numbers of beams;
Described 3rd control module, takes simple beam for controlling, and launches focus launch positive pulse or negative pulse first; And control to launch rp pulse at same position;
Described 3rd arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=2 ..., N, N be more than or equal to 2 positive integer;
Described 4th control module, arranges in two groups of scanning lines of module installation for controlling the 3rd, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises Acanthopanan trifoliatus (L.) Merr. and module, the 4th adds and module and the second concatenation module, wherein:
Described Acanthopanan trifoliatus (L.) Merr. and module, launch for receiving emitter first launch the echo wave beam of the priority twice emitting of focus after, launch the focus echo-signal that successively twice emitting produces to first and sum up;
Described 4th adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described second concatenation module, for the harmonic signal adding the first transmitting focus and obtain, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
The pulse inversion formation method of multi-beam of the present invention, only need be added the echo-signal successively received, and just can realize the object of wave beam distortion correction and acquisition harmonic signal simultaneously, reduce the complexity for echo signal processing; In multifocal situation, the configuration of different received beam is carried out to different focus, while guarantee frame frequency, farthest can reduce again wave beam distortion and Operating Complexity to improve the quality of pulse inversion image.
Accompanying drawing explanation
Clearly understand to make the object of multi-beam pulse inversion formation method of the present invention and system, technical scheme and advantage, below in conjunction with concrete drawings and the specific embodiments, multi-beam pulse inversion formation method of the present invention and system are further elaborated.
Fig. 1 is the schematic diagram of a pulse inversion formation method embodiment of multi-beam of the present invention;
Fig. 2 is the schematic diagram of the pulse inversion formation method embodiment of multi-beam under multifocal of the present invention;
Fig. 3 is the schematic diagram of the pulse inversion formation method embodiment of different beams under multifocal of the present invention.
Detailed description of the invention
Embodiment one:
The multi-beam pulse inversion formation method of the embodiment of the present invention; for ease of describing; in the embodiment of the present invention; only have employed 3 ~ 4 lines of departure and describe the embodiment of the present invention, but it should be noted that the present invention is not limited to this; it goes for the situation of more the lines of departure equally; wherein the application of line of departure number can have different settings, and the scope of the claims in the present invention protection is also not limited to the situation of 3 ~ 4 lines of departure, and it protects the situation with more the lines of departure equally.
The pulse inversion formation method of the embodiment of the present invention one multi-beam, as shown in Figure 1, comprises the steps:
Step S1, the scanning line of transmitting arranges and is divided into odd even two groups by emitter, and the line of departure controlling wherein a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Step S2, receptor after receiving received beam corresponding to scanning line that step S1 launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal.
As a kind of embodiment, emitter arranges and the scanning line of transmitting is divided into odd even two groups, and the line of departure controlling wherein even number set launches positive polarity or negative pulse (in the embodiment of the present invention, for positive pulse), and rp pulse launched by odd number group line.As shown in Figure 1, T
+0, T
+2, T
+4 is the even number line of departure, transmitting be positive pulse, it is (R that corresponding expectation receives line
+01, R
+02), (R
+21, R
+22), (R
+41, R
+, and the distorted reception wave beam of reality is (R 42)
+01 ', R
+02 '), (R
+21 ', R
+22 '), (R
+41 ', R
+42 '); T_1, T_3 are the odd number line of departure, transmitting be rp pulse, it is (R_11 that corresponding expectation receives line, R_12), (R_31, R_32), and the distorted reception wave beam of reality be (R_11 ', R_12 '), (R_31 ', R_32 ');
Wherein T
+the expectation received beam R of 0 correspondence
+02 expectation received beam R_11 on locus the overlap corresponding with T_1, wherein T
+the expectation received beam R of 2 correspondences
+21 expectation received beam R_12 on locus the overlaps corresponding with T_1.The rest may be inferred, and a wave beam in the expectation received beam that expectation received beam corresponding to each line of departure is corresponding with adjacent two lines of departure is overlapping on locus.Like this, from scanning sequential, basically identical with normal simple beam scanning, do not need in each transmitting site repeat its transmission twice, adopt the method for the embodiment of the present invention not improve frame frequency, the frame frequency of its frame frequency and current techniques is basically identical.As the formula (1), for the expectation received beam of locus overlap, process is summed up to the wave beam of reality, obtains harmonic signal.
R0’=R
+01’,R1’=R
+02’+R_11’，R2’=R
+21’+R_12’，
R3’=R
+22’+R_31’,R4’=R
+41’+R_32’，…（1）
The rest may be inferred, can obtain adding and after wave beam.These have overlapping wave beam, and polarity is contrary, take to add and can remove fundametal compoment, strengthen harmonic component.Due to T
+0 and T_1 to the R of locus overlap
+02 and the phase-inversion symmetric of pulling production of R_11, after taking to add and process, just compensate for respective distortion again, the wave beam of the overlap in other space is also all by adding and compensate for distortion.
Preferably, as a kind of embodiment, in described step S2, also comprise the steps:
Step S2 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
In the embodiment of the present invention, as shown in Figure 1, leftmost line and rightmost line are distortion lines, and in this position, do not have wave beam overlapping with it, cannot sum up.For these two received beams, in the embodiment of the present invention, as a kind of embodiment, can be handled as follows: 1, directly filtering, extract harmonic component; 2, this two received beams are given up.
Based on same inventive concept, the embodiment of the present invention one also provides a kind of multi-beam pulse inversion imaging system, comprises emitter and receptor, wherein:
Described emitter comprises first and arranges module, the first control module, wherein:
Described first arranges module, is divided into odd even two groups for being arranged by the scanning line of transmitting;
Described first control module, arranges in two groups of scanning lines of module installation for controlling first, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises first and adds and module, wherein:
Described first adds and module, for after receiving received beam corresponding to scanning line that emitter launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal.
Preferably, as a kind of embodiment, described receptor also comprises the first filtration module and first and gives up module, wherein:
Described first filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Described first gives up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
The multi-beam pulse inversion imaging system of the embodiment of the present invention one, with the course work identical with described multi-beam pulse inversion formation method, therefore, in the embodiment of the present invention one, describes in detail no longer one by one.
The pulse inversion formation method of the embodiment of the present invention one multi-beam and system, by the opposite polarity pulse of parity line alternate emission, the received beam that adjacent transmission line is corresponding is spatially overlapping, then by adding and processing, both reach extraction harmonic component, reach again the object of beam alignment.
Embodiment two:
Based on the same inventive concept with embodiment one, in the embodiment of the present invention two, the pulse inversion formation method of multi-beam under a kind of multifocal is provided, comprises the steps:
Step S10, the scanning line of transmitting arranges and is divided into odd even two groups by emitter in the i-th transmitting focus, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=1 ..., N, N be more than or equal to 2 positive integer;
Step S20, receptor receive that step S10 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S30, carries out focal point mosaic to the harmonic signal that N number of focus obtains, and obtains final harmonic signal.
According to the description of embodiment one, owing to all obtaining distortionless harmonic signal in multiple focus, spliced signal is also distortionless harmonic signal, as a kind of embodiment, nonoverlapping two wave beams for edge are distortion wave beam, can directly filtering extract harmonic signal or give up this two wave beams.
As shown in Figure 2, as a kind of embodiment, launch focuses for two below, the pulse inversion formation method of multi-beam under the embodiment of the present invention two multifocal is described, comprises the steps:
1), transmit scan line arranges and is divided into odd even two groups by emitter in the first transmitting focus, and control even number array line and launch positive polarity or negative pulse (for positive pulse), rp pulse launched by odd number group line.
As shown in Figure 2, T+0, T+2, T+4 is the even number line of departure, what launch is positive pulse, T-1, T-3 is the odd number line of departure, what launch is rp pulse, the expectation received beam R-11 that expectation received beam R+02 and the T-1 that wherein T+0 is corresponding is corresponding is overlapping on locus, expectation received beam R-12 corresponding to expectation received beam R+21 and the T-1 that wherein T+2 is corresponding is overlapping on locus, and the rest may be inferred, the wave beam overlap on locus in the expectation received beam that expectation received beam corresponding to each line of departure is corresponding with adjacent two lines of departure;
2), after wave beam received by receptor, for the expectation received beam of locus overlap, process is summed up to the wave beam of reality, obtains harmonic signal, add identical with formula (1) with method.Like this through adding and after, because adjacent transmission line is to the phase-inversion symmetric of the pulling production of overlapping reception wave beam, just obtain launching distortionless harmonic signal in focus (two that ignore edge receive scanning lines) at first;
3), then in second focus, above-mentioned steps 1 is repeated), in second focus, just transmit scan line is divided into odd even two groups, even number array line launches positive polarity or negative pulse (for positive pulse), rp pulse launched by odd number group line, a wave beam in the expectation received beam that expectation received beam corresponding to each line of departure is corresponding with adjacent two lines of departure is overlapping on locus, for the expectation received beam of locus overlap;
4), process is summed up to the wave beam of reality and obtain distortionless harmonic signal in second transmitting focus;
5), carrying out focal point mosaic to launching at two the harmonic signal that focus obtains, obtaining final harmonic signal.
Due in two focuses, all obtain distortionless harmonic signal, therefore spliced signal is also distortionless harmonic signal.Same, two wave beams at edge are the wave beam of distortion, direct filtering can be taked to extract harmonic signal or the method for giving up these two wave beams receives lines to two that process edge.
As a kind of embodiment, described two focus easily extensible are not limited to two to any focus number.
Based on same inventive concept, the embodiment of the present invention two also provides multi-beam pulse inversion imaging system under a kind of multifocal, comprises emitter and receptor, wherein:
Described emitter comprises second and arranges module, the second control module, wherein:
Described second arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=1 ..., N, N be more than or equal to 2 positive integer;
Described second control module, arranges in two groups of scanning lines of module installation for controlling second, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises second and adds and module and the first concatenation module, wherein:
Described second adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described first concatenation module, for carrying out focal point mosaic to the harmonic signal that N number of focus obtains, obtains final harmonic signal.
Preferably, as a kind of embodiment, described receptor also comprises filtration module and gives up module, wherein:
Described filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Describedly give up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
Multi-beam pulse inversion imaging system under the multifocal of the embodiment of the present invention two, with the course work identical with multi-beam pulse inversion formation method under multifocal described in embodiment two, therefore, in the embodiment of the present invention two, describes in detail no longer one by one.
The pulse inversion formation method of multi-beam and system under the embodiment of the present invention two multifocal, by the opposite polarity pulse of parity line alternate emission, the received beam that adjacent transmission line is corresponding is spatially overlapping, again by adding and processing, both reach extraction harmonic component, reach again the object of beam alignment.
Embodiment three:
Based on the same inventive concept with embodiment one and embodiment two, in the embodiment of the present invention three, the pulse inversion formation method of different beams under a kind of multifocal is provided, comprises the steps:
Step S100, emitter carries out different wave beams for different transmitting focuses and controls, according to focus configuration numbers of beams;
In embodiment three, the pulse inversion imaging technique of multi-beam of the present invention, in multifocal situation, carries out different wave beams to different transmitting focuses and controls, according to focus configuration numbers of beams.
As a kind of embodiment, preferably, describedly refer to and be configured to simple beam according to focus configuration numbers of beams in the near field of emitter, in emitter, far field is configured to dualbeam or four wave beams or more wave beam.
More preferably, as a kind of embodiment, described emitter carries out different wave beams to different transmitting focuses and controls, and according to focus configuration numbers of beams, is controlled by following engineering parameter:
Focal position [pos
1pos
2pos
n]
Numbers of beams [M
1m
2m
n]
Wherein, M
1=1, M
2=2 ...Different configurations is had according to different application.To different transmitting focuses, keep the reception line number of expectation the same with the position of line.
If the reception line density of image is L, so corresponding in different focuses line of departure number:
Line of departure number [L/M
1l/M
2l/M
n]
The position of the line of departure is determined according to the position and numbers of beams that receive line.
Step S200, emitter controls to take simple beam, launches focus launch positive pulse or negative pulse first;
Step S300, emitter controls to launch rp pulse at same position;
Step S400, after receptor receives the echo wave beam of the priority twice emitting of the first transmitting focus that step S200 ~ 300 are launched, launches the focus echo-signal that successively twice emitting produces to first and sums up;
Step S500, emitter configures numbers of beams M in the i-th transmitting focus, arranges and the i-th scanning line launched in focus is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=2 ..., N, N, M be more than or equal to 2 positive integer;
Step S600, receptor receive that step S500 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S700, to the harmonic signal that the first transmitting focus adds and obtains, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
Preferably, as shown in Figure 3, launch focuses with two below, and first focus is near field, and second focus is example in far field, and the pulse inversion formation method of different beams under the embodiment of the present invention three multifocal is described, step is as follows:
1 '), take simple beam, launch focus first and launch positive pulse (also can be negative pulse),
2 '), rp pulse is launched at same position;
3 '), launch the focus echo-signal that successively twice emitting produces to first to sum up.
Owing to taking simple beam, launching beam and received beam overlap, and can not produce distortion like this, therefore add and obtain distortionless harmonic signal under the first transmitting focal status after processing;
4 '), launch in focus second and take multi-beam (2 wave beam), transmit scan line is divided into odd even two groups, even number array line launches positive polarity or negative pulse (for positive pulse), and rp pulse launched by odd number group line;
5 '), a wave beam in the expectation received beam that expectation received beam corresponding to each line of departure is corresponding with adjacent two lines of departure is overlapping on locus, for the expectation received beam of locus overlap, process is summed up to the wave beam of reality, obtains second harmonic signal launched in focus.
Because adjacent transmission line is to the phase-inversion symmetric of the pulling production of overlapping reception wave beam, make to add and after just obtain distortionless harmonic signal.
Under first launches focus and second launches focal status, the position receiving line is consistent, and the position as R+0 and R+01, R+1 and R+02 is all identical, and other received beam position is also identical.Because first launches focus and second and launch focus and take different numbers of beams, the first transmitting focus is caused to be not identical with the second position of launching the focus line of departure, if the first T+0 launching focus is not identical with the second T+0 position of launching focus;
6 '), carrying out focal point mosaic to launching at two the harmonic signal that focus obtains, obtaining final harmonic signal.
Due in two focuses, all obtain distortionless harmonic signal, therefore spliced signal is also distortionless harmonic signal.
Preferably, as a kind of embodiment, the wave beam at edge is the wave beam of distortion under the second transmitting focal status, following method process can be taked: 1. the harmonic signal under direct filtering extraction second transmitting focal status, and then splice with the first harmonic signal launched under focal status; 2. give up the wave beam that the first transmitting focus and second launches focal status lower limb.
As a kind of embodiment, described two focus easily extensible are not limited to two to any focus number.
Based on same inventive concept, the embodiment of the present invention three also provides different beams pulse inversion imaging system under a kind of multifocal, comprises emitter and receptor, wherein:
Described emitter comprises the first configuration module, the 3rd control module, Acanthopanan trifoliatus (L.) Merr. and module, and the 3rd arranges module, the 4th control module, the 4th adds and module, the second concatenation module, wherein:
Described first configuration module, controls for carrying out different wave beams for different transmitting focuses, according to focus configuration numbers of beams;
Described 3rd control module, takes simple beam for controlling, and launches focus launch positive pulse or negative pulse first; And control to launch rp pulse at same position;
Described 3rd arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=2 ..., N, N be more than or equal to 2 positive integer;
Described 4th control module, arranges in two groups of scanning lines of module installation for controlling the 3rd, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises Acanthopanan trifoliatus (L.) Merr. and module, the 4th adds and module and the second concatenation module, wherein:
Described Acanthopanan trifoliatus (L.) Merr. and module, launch for receiving emitter first launch the echo wave beam of the priority twice emitting of focus after, launch the focus echo-signal that successively twice emitting produces to first and sum up;
Described 4th adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described second concatenation module, for the harmonic signal adding the first transmitting focus and obtain, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
Preferably, as a kind of embodiment, described receptor also filtration module and give up module, wherein:
Described filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Describedly give up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
Different beams pulse inversion imaging system under the multifocal of the embodiment of the present invention three, with the course work identical with different beams pulse inversion formation method under multifocal described in embodiment three, therefore, in the embodiment of the present invention three, describes in detail no longer one by one.
The pulse inversion formation method of multi-beam of the present invention, only need be added the echo-signal successively received, and just can realize the object of wave beam distortion correction and acquisition harmonic signal simultaneously, reduce the complexity for echo signal processing; In multifocal situation, the configuration of different received beam is carried out to different focus, while guarantee frame frequency, farthest can reduce again wave beam distortion and Operating Complexity to improve the quality of pulse inversion image.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a pulse inversion formation method for multi-beam, is characterized in that, comprise the steps:
Step S1, the scanning line of transmitting arranges and is divided into odd even two groups by emitter, and the line of departure controlling wherein a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Step S2, receptor after receiving received beam corresponding to scanning line that step S1 launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal;
In described step S2, also comprise the steps:
Step S2 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
2. a multi-beam pulse inversion imaging system, is characterized in that, comprises emitter and receptor, wherein:
Described emitter comprises first and arranges module, the first control module, wherein:
Described first arranges module, is divided into odd even two groups for being arranged by the scanning line of transmitting;
Described first control module, arranges in two groups of scanning lines of module installation for controlling first, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises first and adds and module, wherein:
Described first adds and module, for after receiving received beam corresponding to scanning line that emitter launches, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain harmonic signal;
Described receptor also comprises the first filtration module or first and gives up module, wherein:
Described first filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Described first gives up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
3. the pulse inversion formation method of multi-beam under multifocal, is characterized in that, comprise the steps:
Step S10, the scanning line of transmitting arranges and is divided into odd even two groups by emitter in the i-th transmitting focus, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=1,2 ..., N, N be more than or equal to 2 positive integer;
Step S20, receptor receive that step S10 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S30, carries out focal point mosaic to the harmonic signal that N number of focus obtains, and obtains final harmonic signal;
In described step S20, also comprise the steps:
Step S20 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
4. a multi-beam pulse inversion imaging system under multifocal, is characterized in that, comprise emitter and receptor, wherein:
Described emitter comprises second and arranges module, the second control module, wherein:
Described second arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=1,2 ..., N, N be more than or equal to 2 positive integer;
Described second control module, arranges in two groups of scanning lines of module installation for controlling second, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises second and adds and module and the first concatenation module, wherein:
Described second adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described first concatenation module, for carrying out focal point mosaic to the harmonic signal that N number of focus obtains, obtains final harmonic signal;
Described receptor also comprises filtration module or gives up module, wherein:
Described filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Describedly give up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
5. the pulse inversion formation method of different beams under multifocal, is characterized in that, comprise the steps:
Step S100, emitter carries out different wave beams for different transmitting focuses and controls, according to the position configuration numbers of beams of focus;
Step S200, emitter controls to take simple beam, launches focus launch positive pulse or negative pulse first;
Step S300, emitter controls to launch rp pulse at same position;
Step S400, after receptor receives the echo wave beam of the priority twice emitting of the first transmitting focus that step S200 ~ 300 are launched, launches the focus echo-signal that successively twice emitting produces to first and sums up;
Step S500, emitter configures numbers of beams M in the i-th transmitting focus, arranges and the i-th scanning line launched in focus is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group transmitting rp pulse;
Wherein, i=2 ..., N, N, M be more than or equal to 2 positive integer;
Step S600, receptor receive that step S500 launches i-th launch received beam corresponding to the scanning line of focus after, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Step S700, to the harmonic signal that the first transmitting focus adds and obtains, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
6. the pulse inversion formation method of different beams under multifocal according to claim 5, it is characterized in that, described step S600 comprises the steps:
Step S600 ', receptor, for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component; Or there is no the actual received beam corresponding to expectation received beam of wave beam overlap described in giving up.
7. the pulse inversion formation method of different beams under the multifocal according to claim 5 or 6, it is characterized in that, in described step S100, according to the position configuration numbers of beams of focus, refer to and be configured to simple beam in the near field of emitter, in emitter, far field is configured to dualbeam or four wave beams or more wave beam.
8. the pulse inversion formation method of different beams under multifocal according to claim 7, is characterized in that, described emitter carries out different wave beams to different transmitting focuses and controls, and according to focus configuration numbers of beams, is controlled by following engineering parameter:
Focal position [pos
1pos
2pos
n]
Numbers of beams [M
1m
2m
n]
Wherein, M
1=1, M
2=2 ... M
n=N.
9. a different beams pulse inversion imaging system under multifocal, is characterized in that, comprise emitter and receptor, wherein:
Described emitter comprises the first configuration module, the 3rd control module, Acanthopanan trifoliatus (L.) Merr. and module, and the 3rd arranges module, the 4th control module, the 4th adds and module, the second concatenation module, wherein:
Described first configuration module, controls for carrying out different wave beams for different transmitting focuses, according to the position configuration numbers of beams of focus;
Described 3rd control module, takes simple beam for controlling, and launches focus launch positive pulse or negative pulse first; And control to launch rp pulse at same position;
Described 3rd arranges module, and for launching in focus i-th, the setting of the scanning line of transmitting is divided into odd even two groups, and controls wherein one group of transmitting positive polarity or negative pulse, another group launches rp pulse;
Wherein, i=2 ..., N, N be more than or equal to 2 positive integer;
Described 4th control module, arranges in two groups of scanning lines of module installation for controlling the 3rd, and wherein the line of departure of a group launches positive polarity or negative pulse, and rp pulse launched by another group line;
Described receptor comprises Acanthopanan trifoliatus (L.) Merr. and module, the 4th adds and module and the second concatenation module, wherein:
Described Acanthopanan trifoliatus (L.) Merr. and module, launch for receiving emitter first launch the echo wave beam of the priority twice emitting of focus after, launch the focus echo-signal that successively twice emitting produces to first and sum up;
Described 4th adds and module, for after the received beam that the scanning line receiving the i-th transmitting focus that emitter is launched is corresponding, for locus overlap expectation received beam corresponding to actual received beam, sum up process, obtain the harmonic signal of the i-th transmitting focus;
Described second concatenation module, for the harmonic signal adding the first transmitting focus and obtain, and the harmonic signal that other N-1 focus obtains carries out focal point mosaic, obtains final harmonic signal.
10. different beams pulse inversion imaging system under multifocal according to claim 9, it is characterized in that, described receptor also comprises filtration module or gives up module, wherein:
Described filtration module, for for the actual received beam corresponding to the expectation received beam not having a wave beam overlap, carries out direct filtering, extracts harmonic component;
Describedly give up module, for giving up for the actual received beam do not had corresponding to the expectation received beam of wave beam overlap.
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| CN111257435A (en) * | 2018-12-03 | 2020-06-09 | 奈第电子科技(上海)有限公司 | Method and system for eliminating direct current deviation of ultrasonic echo signal |
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