CN202920239U - Doppler frequency spectrum optimized device applied to touch screen diasonograph - Google Patents

Abstract

The utility model relates to a Doppler frequency spectrum optimized device applied to a touch screen diasonograph. The Doppler frequency spectrum optimized device applied to the touch screen diasonograph comprises a controller and a Doppler parameter optimization module connected with the controller. The Doppler parameter optimization module comprises a pulse repetition frequency (PRT) set module and a base line position set module and analyze the Doppler frequency spectrum formed by a B model signal processing ultrasonic imaging module and a color Doppler ultrasonic imaging module to optimize the frequency spectrum. Therefore, the frequency spectrum is enabled to completely display on the premise of preventing aliasing phenomenon. Then, the optimized frequency spectrum is transmitted to a displayer to correspond to display and output through the controller. The Doppler frequency spectrum optimized device applied to the touch screen diasonograph has the advantages of operating conveniently and improving display effect.

Description

A kind of Doppler frequency spectrum optimization device for the touch screen diasonograph

Technical field

This utility model relates to the touch screen diasonograph, especially be a kind of Doppler frequency spectrum optimization device for the touch screen diasonograph, a kind of touch screen diasonograph of Doppler frequency spectrum Automatic Optimal specifically belongs to the technical field of touch screen diasonograph.

Background technology

Doppler flow inaging shows on two-dimensional ultrasound is the ultrasonogram basis has increased abundant, useful blood flow information, and present ultrasonic boundary has become a kind of indispensable technology.How to obtain effectively, thereby the spectral image of high-quality avoids mistaken diagnosis to seem being even more important to correctly estimating the doppler ultrasound finding.

In doppler imaging, the ordinate of orthogonal axes of frequency spectrum is the positive and negative blood flow rate of blood flow, and its transverse axis coordinate is the time.The size of blood flow rate is subject to the PRF(pulse recurrence frequency) restriction.For the size and the direction that show exactly blood flow rate, PRF must satisfy: f _PRF〉=2f _d, f wherein _PRFBe pulse recurrence frequency, f _dBe frequency displacement, otherwise, the expression of blood flow incorrect polarity will occur, namely aliasing, in case aliasing occurs, bring great impact to the correct diagnosis of doctor.

for the problems referred to above, (Chinese application number is: 201110196110.6 in patent of invention " touch screen diasonograph and pulse Doppler mode regulating method thereof ", China's publication number is: CN102319087A, China is on January 18th, 2012 on the open date) in provide a kind of under the pulse Doppler pattern by directly on the touch screen baseline position send instruction and adjust baseline position and make frequency spectrum show best method to overcome aliasing, although this method has overcome the loaded down with trivial details property of conventional ultrasound diagnostic apparatus by button operation, make the doctor more simple and convenient when operation, but also have problems, be exactly still can't be completely free of manually-operated, automatically adjust baseline position so that spectral image shows best according to the current system situation after can not realizing entering doppler mode.

As can be seen from the above, whether Doppler frequency spectrum can show best with the position of baseline in whole spectral image, close relationship is arranged, and adjust the position of baseline in whole spectral image except above-mentioned manual adjustments, realize automatically adjusting baseline position on the touch screen diasonograph so that Doppler frequency spectrum shows best if want, relate to how automatically PRF is set, the change by PRF makes the position of baseline in whole spectral image in most suitable position.

Need to select suitable PRF under different application, such as, if when be used for measuring the low speed blood flow of the organella pathological changes such as mammary gland, if adopt larger PRF can increase the probability of aliasing.And for example, when detecting the arteriovenous blood flow at heart or each position, the whole body, blood flow rate may not only can cause aliasing if at this moment too reduce PRF greater than PRF, may too lowly cause that color Doppler flow signals is from the pseudomorphism of Endovascular " excessive " because PRF arranges in addition." colorful key " on present most of instrument has colored preferential (color priority) to improve the sensitivity of color Doppler flow signals, but because its spatial resolution is relatively poor, make any tiny artery and vein vascular all become to distortion thick colorful blood when showing, i.e. colored excessive pseudomorphism, this makes the blood vessel that demonstrates according to Color Doppler Imaging is insecure for the measurement of blood vessel radial line.

In order to reduce the generation of colour " excessive " pseudomorphism and aliasing, need rationally to adjust PRF.Need doctor's manual adjustments corresponding to the PRF of blood flow rate in most ultrasonic applications, this must expend a large amount of time of doctor.

Rationally adjustment PRF relates to and detects how rapidly and accurately spectrum envelope, it is the problem of frequency spectrum peak frequency and frequency spectrum minimum frequency, automatic extractive technique for spectrum envelope in prior art comprises based on digital image processing techniques, utilize Image Edge-Detection to realize automatic envelope extraction, such as binaryzation method, marginal point tracing etc., also comprise and utilize Doppler signal at the band limiting properties of frequency domain, adopt numeral to estimate that detection technique realizes automatic envelope extraction, such as percentage ratio method, three fitting a straight line methods etc.

The percentage ratio method only just can obtain estimation effect preferably in the situation that signal to noise ratio is very high.Due to the variation of signal bandwidth in whole cardiac cycle, be difficult to find a long-time best percentage ratio coefficient.Three line fitting methods are when the diastasis of heart, signal bandwidth was narrower, and the extraction effect of spectrum envelope is better, and are obviously relatively poor at systole.

Summary of the invention

Problem to be solved in the utility model is that the baseline position in present diasonograph regulating impulse repetition rate manually and corresponding frequency spectrum scale makes the doctor spend the plenty of time in this regard, for the problems referred to above, this utility model provides a kind of Doppler frequency spectrum optimization device for the touch screen diasonograph, makes the current Doppler frequency spectrum envelope of system's automatic acquisition and automatically regulates baseline to the optimum position of view picture spectral image according to this.

The technical scheme that provides according to this utility model, described Doppler frequency spectrum optimization device for the touch screen diasonograph, comprise controller, also comprise the Doppler parameter optimization module that is connected with controller, described Doppler parameter is optimized module and is comprised PRF setting module and baseline position setting module; The outfan of controller is connected with display.

Radiating circuit in described controller and diasonograph interconnects, and the outfan of radiating circuit is connected with transducer; The outfan of transducer is connected with receiving circuit, receiving circuit synthesizes with demodulator by wave beam and is connected, described demodulator respectively by b mode signal process the ultra sonic imaging module, color Doppler ultrasound imaging module is connected with display, receiving circuit, wave beam are synthetic, demodulator, b mode signal processes ultra sonic imaging module, color Doppler ultrasound imaging module and display and controller interconnects; Controller also is connected with the touch screen input module.

Compared with the prior art this utility model has the following advantages: this utility model provides a kind of pulse recurrence frequency automatic optimization method and device thereof for the touch screen diasonograph, after obtaining doppler data, the position of the automatic regulating impulse repetition rate of system and frequency spectrum baseline shows whole spectral image under the prerequisite that does not produce aliasing best.

Description of drawings

Fig. 1 is this utility model touch screen diasonograph system block diagram.

Fig. 2 is bipolarity spectrum diagram when not producing aliasing.

Fig. 3 is that this utility model is regulated PRF automatically and baseline moves flow chart.

Fig. 4 is the power spectrum chart of Doppler signal.

Fig. 5 (a) is a kind of schematic diagram that this utility model positive polarity and negative polarity frequency spectrum produce aliasing.

To be this utility model move by automatic baseline Fig. 5 (b) solves positive polarity and change negative polarity spectral aliasing schematic diagram into.

Fig. 6 (a) is the another kind of schematic diagram that this utility model positive polarity and negative polarity frequency spectrum produce aliasing.

Fig. 6 (b) is that this utility model changes negative polarity spectral aliasing schematic diagram into by increasing PRF solution positive polarity.

Fig. 7 (a) is a kind of schematic diagram that this utility model negative polarity and positive polarity produce aliasing.

To be this utility model move by automatic baseline Fig. 7 (b) solves negative polarity and change positive polarity spectral aliasing schematic diagram into.

Fig. 8 (a) is that this utility model negative polarity and positive polarity are produced the another kind of schematic diagram that frequency spectrum produces aliasing.

Fig. 8 (b) is that this utility model changes positive polarity spectral aliasing schematic diagram into by increasing PRF solution negative polarity.

Fig. 9 (a) is a kind of schematic diagram of bipolarity spectrogram.、

Fig. 9 (b) is that this utility model is automatically regulated PRF and made the bipolarity spectral image show best schematic diagram.

Figure 10 (a) is a kind of schematic diagram of positive polarity spectrogram.

Figure 10 (b) is that this utility model is automatically regulated PRF and made the positive polarity spectral image show best schematic diagram.

Figure 11 (a) is the negative polarity spectrogram.

Figure 11 (b) is that this utility model is automatically regulated PRF and made the negative polarity spectral image show best schematic diagram.

The specific embodiment

The utility model is described in further detail below in conjunction with concrete drawings and Examples.

As shown in Figure 1, a kind of system of touch screen ultrasonic device comprises: controller 101, radiating circuit 102, transducer 103, receiving circuit 104, wave beam are synthetic 105, demodulator 106, b mode signal are processed ultra sonic imaging module 107, color Doppler ultrasound imaging module 108, display 109, touch screen input 110 and Doppler parameter and optimized module 111, and Doppler parameter is optimized module 111 and further comprised PRF setting module 112 and baseline position setting module 113.

transducer 103(also is probe) be hyperacoustic transmitter-receiver device, can convert electrical energy into acoustic energy, also acoustic energy can be converted to electric energy, at first radiating circuit 102 is under the coordination of controller 101, send the signal of telecommunication to transducer 103, being converted into ultrasonic emitting by transducer 103 goes out, receiving circuit 104 is responsible for receiving transducer 103 and is passed the echo signal (being converted to the signal of telecommunication by transducer) of coming, and it is amplified, the processing such as digital to analog conversion, echo signal on the synthetic 105 pairs of different directions of wave beam carries out dynamic focusing and dynamic aperture is processed, it is synthesized together, then be transferred to demodulator 106 and carry out demodulation process, then the I/Q data that produce are transferred to respectively b mode signal and process ultra sonic imaging module 107 and color Doppler ultrasound imaging module 108, one road signal is processed 107 processing of ultra sonic imaging module through b mode signal and is obtained the 2-D gray image signal, another road signal obtains the color doppler image signal through processing such as wall filterings, final above-mentioned picture signal is presented on display 109 after synthetic, Doppler frequency spectrum is optimized module 111 and is mainly come automatic optimal imaging by analyzing the Doppler frequency spectrum that is formed by b mode signal processing ultra sonic imaging module 107 and color Doppler ultrasound imaging module 108." I " of described I/Q data refers to phase component (In-phase component), and " Q " makes a comment or criticism and hand over component (quadrate component).

Touch screen input 110 is connected with controller 101, the outfan of controller 101 and radiating circuit 102, transducer 103 and receiving circuit 104, wave beam are synthetic 105, demodulator 106 is connected successively, demodulator 106 is connected with display 109 with b mode signal processing ultra sonic imaging module 107 with after color Doppler ultrasound imaging module 108 is connected respectively again and said units all is connected with controller 101, and controller 101 is also optimized module 111 with Doppler parameter and is connected.

Bipolarity frequency spectrum when aliasing not occuring shown in Figure 2 can find out that on scheming the transverse axis of Doppler frequency spectrum represents the time, and the longitudinal axis represents frequency shift (FS), and the longitudinal axis of Doppler frequency spectrum has usually from-f _PRF/ 2 to+f _PRF/ 2 frequency range.The positive frequencies scope can be assigned as 0 to+f _PRF/ 2 positive frequency, on the contrary the negative sense frequency range can be assigned as-f _PRF/ 2 to 0 negative frequency.Convenient describe and do not produce ambiguity for follow-up, with frequency 0 to+f _PRFThe frequency spectrum of/2 correspondences is called the positive polarity frequency spectrum, otherwise, with frequency-f _PRFThe frequency spectrum of/2 to 0 correspondences is called the negative polarity frequency spectrum.Whole spectrum envelope is by Maximum frequency curve f _max201 and minimum frequency curve f _min202 form, wherein f _MaxHMaximum frequency curve f _max201 maximum, f _MinLMinimum frequency curve f _min202 minima.Change the size of positive-negative polarity frequency range by the position of mobile baseline 203.

But in ultrasonic examination, the situation of bipolarity frequency spectrum that above-mentioned not aliasing occurs is less, and in most cases, Doppler frequency spectrum figure is unsatisfactory, and for example, when detecting the position such as heart, blood flow rate may greater than current setting PRF, aliasing can occur.This problem this utility model just is to be solved in the technical scheme that Fig. 3 discloses.

As shown in Figure 3, a kind of Doppler frequency spectrum optimization method for the touch screen diasonograph comprises the following steps:

A, enter doppler mode, obtain doppler data, calculate the Maximum frequency curve f of Doppler frequency spectrums by PRF setting module 112 _maxAnd minimum frequency curve f _min, and it is transferred to controller 101 judges whether Doppler frequency spectrum aliasing occurs.

In step 301, at first, the Output rusults of being processed ultra sonic imaging module 107 and color Doppler ultrasound imaging module 108 by b mode signal obtains doppler image data after synthetic; By controller 101, doppler image data is transferred to PRF setting module 112;

In step 302, calculate Maximum frequency curve f by PRF setting module 112 _maxMaximum frequency values f _MaxHAnd minimum frequency curve f _minMinimum frequency value f _MaxL

Now take Maximum frequency curve as example, as shown in Figure 4, the power spectral density of establishing the Noise Doppler signal is S (f), and the power spectral density of noise is S _n(f), Maximum frequency curve f _maxThe power spectral density of DOPPLER ULTRASOUND SIGNAL be S _d(f).Defined function φ (f) is:

$\mathrm{\φ}\left(f\right)=\underset{0}{\overset{f}{\∫}}S\left(f\right)\mathrm{df}$

As f＞f _MaxHThe time, S (f)=S _n(f), illustrate only to have noise contribution in current Doppler signal, curve shows as more smooth; As f≤f _MaxHThe time, S (f)=S _d(f)+S _n(f), illustrate in current Doppler signal not only to comprise noise contribution but also signal component is arranged at this moment curve performance steeper.So, changing to pure noise region from signal band noise region is to occur on φ (f) point of inflexion on a curve, and its corresponding frequency is estimated Doppler signal maximum frequency values f _MaxH

φ (f) curve through after proper transformation, is utilized the character of wavelet transformation analysis curve under different scale, describe position and characteristic and then the identification maximum frequency values f of Singular Point by the wavelet transformation local maximum _MaxHThe position.In like manner, utilize the aforesaid operations conversion can access minimum frequency curve f _minMinimum frequency value f _MaxH

In step 303, judge by controller 101 whether current frequency spectrum aliasing occurs.In an embodiment of the present utility model, by current Maximum frequency curve f _maxMaximum f _MaxHWith current positive frequency boundary relatively or by current minimum frequency curve f _minMinima f _MinLRelatively judge whether to occur aliasing with current negative frequency boundary.

If maximum frequency values f _MaxHGreater than current positive frequency boundary or minimum frequency value f _MinLDuring less than current negative frequency boundary, aliasing occurs, otherwise, do not have aliasing to produce.

If b Doppler frequency spectrum generation aliasing increases PRF or adjusts baseline position to overcome the generation of aliasing by baseline setting module 113 by PRF setting module 112.

In step 304, as shown in Fig. 5 (a), note Maximum frequency curve f _maxMaximum frequency values f _MaxHThe border, place is Edge ₁, minimum frequency curve values f _minMinimum frequency value f _MinLThe border, place is Edge ₂, when the positive polarity frequency spectrum is preponderated and f _MaxHGreater than current positive frequency boundary+m ₁f _PRFThe time, wherein, m ₁Percentage ratio, 0＜m ₁＜1, border Edge1, border EDg2 all represent corresponding frequency values, so-called positive polarity frequency spectrum preponderate refer to whole frequency spectrum in the part more than zero base line greater than the part below zero base line, described negative polarity frequency spectrum is preponderated just the opposite with the preponderate content that refers to of positive polarity frequency spectrum;

The situation of Doppler frequency spectrum is discussed by following several situations, is specially:

If situation 1 has:

Edge ₁<Edge ₂

Illustrate the current former positive frequency that is converted to the negative frequency zone not with former negative polarity frequency spectrum generation aliasing, again due to the variation that is forward frequency spectrum occurrence frequency polarity, therefore by baseline position setting module 113, baseline is moved down Δ f by former 0 position _PRFIndividual unit moves to 0 ' position, wherein, and Δ f _PRFMeet the following conditions:

|-(1-m ₁)f _PRF|-D _v2>Δf _PRF≥D _v1+f _s1

Wherein, D _v1Expression positive polarity frequency spectrum changes the spectrum width of negative polarity frequency field, D into _v2Represent maximum negative polarity spectrum width, f _s1Peak frequency f _MaxHWith positive frequency boundary+m ₁f _PRFBetween the reservation margin value, specifically can be set up on their own by the user.At last, by controller 101, result is transferred to display 109 and shows, as shown in Fig. 5 (b).

If situation 2 has:

Edge ₁≥Edge ₂

As shown in Fig. 6 (a), current former positive polarity frequency spectrum and the former negative polarity frequency spectrum generation aliasing that is converted to the negative polarity frequency field, be that whole spectrum width is greater than the PRF of current setting, only depend on the position of regulating baseline 601 can't overcome the generation aliasing, need to increase PRF to overcome aliasing, with positive frequency boundary+m by PRF setting module 112 ₁f′ _PRFBe set as:

m ₁f′ _PRF=f _s1+D _v1+m ₁f _PRF

Further, with negative frequency boundary-(1-m ₁) f ' _PRFBe set as:

$-(1-m_1)f_{\mathrm{PRF}}^{\&prime;}=-(1-m_1)\&CenterDot;f_{\mathrm{PRF}}-\frac{1-m_1}{m_1}({\mathrm{<figure-callout\; id="1"\; label="D\; v"\; filenames="HDA00002020287000041.png,HDA00002020287000042.png"\; state="\{\{state\}\}">D</figure-callout>}}_v+f_{s1})$

At last, by controller 101, result is transferred to display 109 and shows, as shown in Fig. 6 (b).

As shown in Fig. 7 (a), when the negative polarity frequency spectrum is preponderated and minimum frequency curve f _minMinimum frequency f _MinLLess than current negative frequency boundary-(1-m ₁) f _PRFThe Shi Fasheng aliasing, namely frequency spectrum 701 has changed to opposite positive polarity frequency field less than the portions of the spectrum 702 of negative frequency boundary.

If situation 3 has:

Edge ₁<Edge ₂

The current former negative polarity frequency spectrum that is converted to the positive polarity frequency field not with former positive polarity frequency spectrum generation aliasing, again due to the variation that is negative polarity frequency spectrum occurrence frequency polarity, thus baseline position setting module 113 with baseline by moving Δ f on former 0 position _PRFIndividual unit is 0 ' position extremely now, wherein, and Δ f _PRFMeet the following conditions:

m ₁f _PRF-D _v4>Δf _PRF≥D _v3+f _s2

Wherein, D _v3The part that negative frequency changes the positive frequency zone into, D _v4The positive spectrum width corresponding to peak frequency of Maximum frequency curve, f _s2Negative sense minimum frequency and the frequency limit of bearing-(1-m ₁) f _PRFBetween the reservation margin value, specifically can be set up on their own by the user.At last, by controller 101, result is transferred to display 109 and shows, as shown in Fig. 7 (b).

If situation 4 has:

Edge ₁≥Edge ₂

As shown in Fig. 8 (a), current former negative polarity frequency and the former positive polarity frequency spectrum generation aliasing that is converted to the positive polarity frequency field, namely spectrum width greater than current setting PRF, needs PRF setting module 112 to increase PRF, with negative frequency boundary-(1-m ₁) f ' _PRFBe set as:

-(1-m ₁)f′ _PRF=-(1-m ₁)f _PRF-D _v3-f _s2

Further, with positive frequency boundary+m ₁f′ _PRFBe set as:

$m_1{f}_{\mathrm{PRF}}^{\&prime;}=m_1{f}_{\mathrm{PRF}}+\frac{{\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="HDA00002020287000041.png,HDA00002020287000042.png"\; state="\{\{state\}\}">m</figure-callout>}}_1}{1-m_1}(D_{v3}+f_{s2})$

At last, by controller 101, result is transferred to display 109 and shows, as shown in Fig. 8 (b).

C, judge by PRF setting module 112 whether the spectrum width of Doppler frequency spectrum satisfies predefined threshold value, if do not satisfy, reduce PRF by PRF setting module 112 satisfying under the prerequisite that does not produce aliasing.

In step 305, judge according to current PRF whether spectrum width satisfies threshold value T by PRF setting module 112 _f1Or T _f2, T _f1And T _f2Be the percent about PRF, specifically can be set up on their own by the user.If satisfy threshold value, enter step 309, otherwise, enter step 306.

Shown in Figure 9 is the bipolarity spectrogram.Can find out from Fig. 9 (a), for current PRF, whole frequency spectrum only accounts for the area of its 30% left and right, fails to reach predefined threshold value T _f1And T _f2Desired spectral range is to such an extent as to easily like this cause that shown frequency spectrum is too little can not accurately be measured.For the problems referred to above, after need to reducing PRF and make spectral image show fully by PRF setting module 112, then by controller 101, result be transferred to display 109 and shows.Fully and not aliasing occuring in order to guarantee that frequency spectrum shows, judges whether following condition is set up:

f _maxH≥|f _minL|

| f _MinL| expression f _MinLAbsolute value, if following formula set up, by PRF setting module 112 with positive frequency boundary+m ₁f′ _PRFBe set as:

m ₁f′ _PRF=f _maxH+f _s

Wherein, f _sCan be threshold value T _f1With f _MaxHBetween the reservation margin value, can be also T _f2With f _MinLBetween the reservation margin value, specifically can be set up on their own by the user.

Further, by PRF setting module 112 with negative frequency boundary-(1-m ₁) f ' _PRFBe set as:

$-(1-m_1)f_{\mathrm{PRF}}^{\&prime;}=(\frac{1}{m_1}-1)\&CenterDot;(f_{\max H}+f_s)$

If following formula is false, pass through PRF setting module 112 with positive frequency boundary+m ₁f′ _PRFBe set as: m ₁f′ _PRF=| f _MinL|+f _s

Further, by PRF setting module 112 with negative frequency boundary-(1-m ₁) f ' _PRFBe set as:

$-(1-m_1)f_{\mathrm{PRF}}^{\&prime;}=(\frac{1}{m_1}-1)\&CenterDot;\left(\right|f_{\min L}|+f_s).$

Shown in Figure 10 (a) is the positive polarity spectrogram.Can find out from Figure 10 (a), its positive polarity frequency spectrum is less with respect to the PRF of current setting, fails to reach predefined threshold value T _f1Desired spectral range, not accurate enough to its estimation of carrying out blood flow rate like this, adjust the size of whole frequency spectrum in current PRF therefore need to reduce PRF by PRF setting module 112, then by controller 101, result is transferred to display 109 and shows.

By PRF setting module 112 with positive frequency boundary+m ₁f′ _PRFBe set as:

m ₁f′ _PRF=f _maxH+f _s'

Wherein, f _s'Threshold value T _f1With f _MaxHBetween the reservation margin value, specifically can be set up on their own by the user.

Further, by PRF setting module 112 with negative frequency boundary-(1-m ₁) f ' _PRFBe set as:

$-(1-m_1)f_{\mathrm{PRF}}^{\&prime;}=(\frac{1}{m_1}-1)\&CenterDot;(f_{\max H}+f_{s^{\&prime;}})$

Shown in Figure 11 (a) is the negative polarity spectrogram.Can find out from Figure 11 (a), frequency spectrum shows abundant not, fails to reach predefined threshold value T _f2Desired spectral range in order to guarantee the abundant demonstration of spectral image, is set 112 modules with negative frequency boundary-(1-m by PRF ₁) f ' _PRFBe set as:

(1-m ₁)f′ _PRF=|f _minL|+f _s＂

Wherein, f _s＂T _f2With f _MinLBetween the reservation margin value, specifically can be set up on their own by the user.

Further, by PRF setting module 112 with positive frequency boundary+m ₁f′ _PRFBe set as:

$m_1{f}_{\mathrm{PRF}}^{\&prime;}=\frac{{\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="HDA00002020287000041.png,HDA00002020287000042.png"\; state="\{\{state\}\}">m</figure-callout>}}_1}{1-m_1}(f_{\min L}+f_{s^{\&prime;\&prime;}})$

Can find out from Fig. 9 (b), Figure 10 (b) and Figure 11 (b), spectral image probably accounts for 80% ~ 90% of whole frequency spectrum viewing area after overregulating, and like this spectral image such as is measured at the operation more satisfactory.

D, judge by baseline setting module 113 whether current Doppler frequency spectrum needs upset, if need, change the coordinate axes polarity by baseline setting module 113 and adjust the position of baseline.

After handling the inadequate situation of spectral aliasing and spectrogram demonstration, in step 307 and step 308, judge by baseline setting module 113 whether the polarity of current spectral image needs to change, namely whether need the inverted spectrum image, by the polarity that changes Doppler's shows signal, spectral image is inverted and is the more familiar orientation of doctor.

E, Doppler optimize module 111 and by controller 101, above-mentioned frequency spectrum optimization result are transferred to the corresponding demonstration output of display 109.

The above; it is only the specific implementation process in this utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with the people of this technology within the disclosed technical scope of this utility model; can understand conversion or the replacement expected; all should be encompassed in of the present utility model comprise scope within, therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.

Claims (1)

1. Doppler frequency spectrum optimization device that is used for the touch screen diasonograph, comprise controller (101), it is characterized in that, also comprise the Doppler parameter optimization module (111) that is connected with controller (101), described Doppler parameter is optimized module (111) and is comprised PRF setting module (112) and baseline position setting module (113); The outfan of controller (101) is connected with display (109);

radiating circuit (102) in described controller (101) and diasonograph interconnects, and the outfan of radiating circuit (102) is connected with transducer (103), the outfan of transducer (103) is connected with receiving circuit (104), receiving circuit (104) synthesizes (105) by wave beam and is connected with demodulator (106), described demodulator (106) is processed ultra sonic imaging module (107) by b mode signal respectively, color Doppler ultrasound imaging module (108) is connected with display (109), receiving circuit (104), wave beam synthesizes (105), demodulator (106), b mode signal is processed ultra sonic imaging module (107), color Doppler ultrasound imaging module (108) and display (109) interconnect with controller (101), controller (101) also is connected with touch screen input module (110).

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