CN110123376A - Doppler's detection method, device, terminal device and the storage medium of blood flow signal - Google Patents
Doppler's detection method, device, terminal device and the storage medium of blood flow signal Download PDFInfo
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- A61B8/06—Measuring blood flow
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
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- A61B8/488—Diagnostic techniques involving Doppler signals
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- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
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Abstract
The present invention relates to ultrasonic diagnostic technique fields, propose Doppler's detection method, device, terminal device and the computer storage medium of a kind of blood flow signal.Doppler's detection method includes: to obtain the predetermined pulse repetition rate of pulse Doppler detection；The surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；If the surface temperature rise is less than preset upper limit value, the highest pulse recurrence frequency that can reach when the surface temperature rise is improved to the upper limit value is calculated；Pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal.The present invention makes full use of the surplus of ultrasonic probe surface temperature rise, mentions the pulse recurrence frequency that pulse Doppler detects to highest under conditions of surface temperature rise allows, and so as to obtain more valid data informations, improves the sensitivity of blood flow signal detection.
Description
Technical field
The present invention relates to Doppler's detection method of ultrasonic diagnostic technique field more particularly to a kind of blood flow signal, device,
Terminal device and computer storage medium.
Background technique
In ultrasonic diagnostic technique field, Doppler technology is widely used in the non-destructive testing and measurement of human bloodstream.Its
In, pulse Doppler technology can show the dynamic-change information of blood flow in a certain specified region, have important clinical meaning.
In order to ensure human-body safety needs the machine to instrument when carrying out the detection of blood flow signal using diasonograph
The parameters such as tool index, heat number and ultrasonic probe surface temperature rise make certain limitation.For example, needing to guarantee diagnostic ultrasonic equipment
Mechanical index be less than defined upper limit value.And in actual operation, if the electron focusing of ultrasonic probe and physics focal position
Close, especially when the low velocity flow to superficial thin vessels carries out Doppler frequency spectrum detection, transmitting focusing position is shallow, aperture is small,
The mechanical index of instrument easily reaches upper limit value at this time.In response to this, general at present using limitation probe emitting voltage
The mode of amplitude come ensure mechanical index be no more than upper limit value.However, following new problem can be generated in this way: to superficial
Emitted energy when the small blood flow detection of low speed is limited, and the sensitivity of signal detection is caused to decline.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of Doppler's detection method of blood flow signal, device, terminal devices
And computer storage medium, the sensitivity of blood flow signal detection can be effectively improved, and will not influence diagnostic ultrasonic equipment
Mechanical index.
The first aspect of the embodiment of the present invention provides a kind of Doppler's detection method of blood flow signal, comprising:
Obtain the predetermined pulse repetition rate of pulse Doppler detection；
The surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；
If the surface temperature rise is less than preset upper limit value, calculate when the surface temperature rise is improved to the upper limit value
The highest pulse recurrence frequency that can reach；
Pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal.
The second aspect of the embodiment of the present invention provides a kind of Doppler's detection device of blood flow signal, comprising:
Predetermined pulse repetition rate obtains module, for obtaining the predetermined pulse repetition rate of pulse Doppler detection；
Detecting head surface temperature rise computing module, for calculating the surface temperature of ultrasonic probe according to the predetermined pulse repetition rate
It rises；
Highest pulse recurrence frequency computing module, if being less than preset upper limit value for the surface temperature rise, calculating is worked as
The highest pulse recurrence frequency that the surface temperature rise can reach when improving to the upper limit value；
Pulse Doppler detection module is obtained for carrying out pulse Doppler detection using the highest pulse recurrence frequency
To doppler blood flow signal.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in
In the memory and the computer program that can run on the processor, when the processor executes the computer program
The step of realizing the Doppler's detection method for the blood flow signal that the first aspect such as the embodiment of the present invention provides.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the first aspect such as the embodiment of the present invention is realized when the computer program is executed by processor
The step of Doppler's detection method of the blood flow signal of offer.
In embodiments of the present invention, the predetermined pulse repetition rate of pulse Doppler detection is obtained；According to the default arteries and veins
Rush the surface temperature rise that repetition rate calculates ultrasonic probe；If the surface temperature rise is less than preset upper limit value, calculate when described
The highest pulse recurrence frequency that surface temperature rise can reach when improving to the upper limit value；Using the highest pulse recurrence frequency
Pulse Doppler detection is carried out, doppler blood flow signal is obtained.The present invention makes full use of the surplus of ultrasonic probe surface temperature rise,
Surface temperature rise mentions the pulse recurrence frequency that pulse Doppler detects to highest under conditions of allowing, more so as to obtain
Valid data information improves the sensitivity of blood flow signal detection.In addition, since the mechanical index size of diagnostic ultrasonic equipment is with arteries and veins
Rush that repetition rate is unrelated, therefore the present invention will not have an impact the mechanical index of diagnostic ultrasonic equipment, be highly suitable for shallow
The low velocity flow of table thin vessels carries out Doppler frequency spectrum detection.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of stream of one embodiment of Doppler's detection method of blood flow signal provided in an embodiment of the present invention
Cheng Tu；
Fig. 2 is a kind of stream of second embodiment of Doppler's detection method of blood flow signal provided in an embodiment of the present invention
Cheng Tu；
Fig. 3 is a kind of stream of the third embodiment of Doppler's detection method of blood flow signal provided in an embodiment of the present invention
Cheng Tu；
Fig. 4 is a kind of structure of one embodiment of Doppler's detection device of blood flow signal provided in an embodiment of the present invention
Figure；
Fig. 5 is a kind of schematic diagram of terminal device provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
The embodiment of the invention provides Doppler's detection method, device, terminal device and the computers of a kind of blood flow signal
Storage medium, can effectively improve the sensitivity of blood flow signal detection, and will not influence the mechanical index of diagnostic ultrasonic equipment.
Referring to Fig. 1, a kind of one embodiment packet of Doppler's detection method of blood flow signal in the embodiment of the present invention
It includes:
101, the predetermined pulse repetition rate of pulse Doppler detection is obtained；
In embodiments of the present invention, the predetermined pulse repetition rate of pulse Doppler detection is obtained first.The predetermined pulse
Repetition rate is user preset pulse recurrence frequency (pulse repetition before carrying out pulse Doppler and detecting
Frequency), the general corresponding gear by adjusting diagnostic ultrasonic equipment sets the pulse recurrence frequency.
102, the surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；
After obtaining the predetermined pulse repetition rate, ultrasonic probe is calculated according to the predetermined pulse repetition rate
Surface temperature rise.When diagnostic ultrasonic equipment is under supersonic blood doppler mode, can be calculated according to preset acoustical power model
The surface temperature rise numerical value of ultrasonic probe.Specifically, the arteries and veins of the centre frequency of the surface temperature rise and ultrasound emission popped one's head in, ultrasound emission
Rush the relating to parameters such as repetition rate, emitting voltage and transmitting aperture size.Emitting voltage is higher, pulse recurrence frequency is bigger, hair
Perforation diameter is bigger, then the energy emitted is more, and the surface temperature rise of probe is higher.When other parameters are fixed, the table of probe
It is can simplify between face temperature rise and pulse recurrence frequency as a kind of linear relationship, but generally can be according to the result pair of sound power measurement
The linear relationship is modified.
103, judge whether the surface temperature rise is less than preset upper limit value；
After the surface temperature rise of ultrasonic probe is calculated, judge whether the surface temperature rise is less than the preset upper limit
Value.Here upper limit value is the highest face temperature temperature rise formulated in the relevant criterion of medical instrument the surface temperature rise of ultrasonic probe
Value is no more than the upper limit value in the surface temperature rise for must assure that when pulse Doppler detection ultrasonic probe.If the surface
Temperature rise is less than preset upper limit value, thens follow the steps 104-105, otherwise directly executes step 106.
104, the highest pulse recurrence frequency that can reach when the surface temperature rise is improved to the upper limit value is calculated；
The surface temperature rise is less than preset upper limit value, is calculated at this time when the surface temperature rise is improved to the upper limit value
The highest pulse recurrence frequency that can reach.Specifically, can will be between the surface temperature rise and pulse recurrence frequency of ultrasonic probe
It is reduced to linear relationship, the highest pulse recurrence frequency is then calculated according to the linear relationship.If set by user
Pulse recurrence frequency is 0.6KHz, and mechanical index MI has reached set upper limit MI=1.9, and the surface temperature rise of probe is 1 DEG C.This
When apart from 10 DEG C of the defined surface temperature rise upper limit, there are also 9 DEG C of surpluses, it is assumed that the surface temperature rise of probe and pulse recurrence frequency at
Linear relationship, then it is 0.6*9=5.4KHz that the highest pulse recurrence frequency can be calculated according to the linear relationship.It needs
Illustrate, above-mentioned calculating process is a kind of operation of simplification, can be according to actual temperature if pursuing higher accuracy in computation
Rising mould type is calculated.
105, pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal；
After the highest pulse recurrence frequency is calculated, it is more that pulse is carried out using the highest pulse recurrence frequency
Pu Le detection, obtains doppler blood flow signal.The application makes full use of the surplus of ultrasonic probe surface temperature rise, by ultrasound emission
Pulse recurrence frequency is improved to the highest pulse recurrence frequency that can reach, and how general carry out pulse using highest pulse recurrence frequency
Detection is strangled, more data points can be obtained within the unit time, more effective informations can be obtained, to improve signal
The sensitivity of detection.
106, pulse Doppler detection is carried out using the predetermined pulse repetition rate, obtains doppler blood flow signal.
The surface temperature rise of ultrasonic probe has reached the upper limit value, can not improve the pulse recurrence frequency of ultrasound emission at this time,
Therefore pulse Doppler detection can only be carried out using the predetermined pulse repetition rate, obtain doppler blood flow signal.
In embodiments of the present invention, the predetermined pulse repetition rate of pulse Doppler detection is obtained；According to the default arteries and veins
Rush the surface temperature rise that repetition rate calculates ultrasonic probe；If the surface temperature rise is less than preset upper limit value, calculate when described
The highest pulse recurrence frequency that surface temperature rise can reach when improving to the upper limit value；Using the highest pulse recurrence frequency
Pulse Doppler detection is carried out, doppler blood flow signal is obtained.The present invention makes full use of the surplus of ultrasonic probe surface temperature rise,
Surface temperature rise mentions the pulse recurrence frequency that pulse Doppler detects to highest under conditions of allowing, more so as to obtain
Valid data information improves the sensitivity of blood flow signal detection.In addition, since the mechanical index size of diagnostic ultrasonic equipment is with arteries and veins
Rush that repetition rate is unrelated, therefore the present invention will not have an impact the mechanical index of diagnostic ultrasonic equipment, be highly suitable for shallow
The low velocity flow of table thin vessels carries out Doppler frequency spectrum detection.
Referring to Fig. 2, a kind of second embodiment packet of Doppler's detection method of blood flow signal in the embodiment of the present invention
It includes:
201, the predetermined pulse repetition rate of pulse Doppler detection is obtained；
202, the surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；
203, judge whether the surface temperature rise is less than preset upper limit value；
If the surface temperature rise is less than preset upper limit value, 204-208 is thened follow the steps, otherwise directly executes step 209.
204, the highest pulse recurrence frequency that can reach when the surface temperature rise is improved to the upper limit value is calculated；
205, pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal；
Step 201-205 is identical as step 101-105, specifically can refer to the related description of step 101-105.
206, down-sampled processing is carried out to the doppler blood flow signal, obtains multiple branches blood flow signal；
After obtaining doppler blood flow signal, down-sampled processing is carried out to the doppler blood flow signal, obtains multichannel point
Branch blood flow signal is equal to the predetermined pulse repetition rate per the sample frequency of branch's blood flow signal all the way.Since blood flow is believed
It number is that the scale range of waveform diagram is determined according to the pulse recurrence frequency of user setting when showing, and according to highest pulse weight
It is down-sampled to blood flow signal progress after complex frequency acquisition blood flow signal, the blood corresponding to predetermined pulse repetition rate can be obtained
Signal is flowed, so that the displaying of blood flow signal makes full use of the scale range of waveform diagram and the boundary without departing from scale, convenient for inspection
Survey personnel check blood flow signal.
When carrying out down-sampled processing, if highest pulse recurrence frequency is the integral multiple of predetermined pulse repetition rate, directly
It connects and down-sampled processing is carried out using the integral multiple, branch's number of finally obtained blood flow signal is equal to the integral multiple.If highest arteries and veins
Repetition rate is rushed not and be the integral multiple of predetermined pulse repetition rate, such as 1.5 times, then can take first carrying out 2 times and rise sampling, then
3 times of down-sampled processing modes of progress, the multiple that branch's number of finally obtained blood flow signal uses when being equal to down-sampled, i.e., 3
Road branch blood flow signal.
Assuming that highest pulse recurrence frequency is 4 times of predetermined pulse repetition rate, highest pulse is used within the unit time
Repetition rate collects 12 data points, respectively D1, D2, D3 ... D12.After then passing through 4 times of down-sampled processing, it will obtain
4 road signals, respectively " D1, D5, D9 ", " D2, D6, D10 ", " D3, D7, D11 " and " D4, D8, D12 ".
207, signal processing is carried out to the multiple branches blood flow signal, obtains multichannel blood flow frequency spectrum signal；
Down-sampled processing is being carried out, after obtaining multiple branches blood flow signal, signal is carried out to these branch's blood flow signals
Processing, obtains multichannel blood flow frequency spectrum signal.Specifically, the signal processing may include wall filtering, FFT, GAP filling and smooth place
Reason and etc..
208, by the multichannel blood flow frequency spectrum signal fused at target blood flow frequency spectrum signal all the way；
After obtaining multichannel blood flow frequency spectrum signal, multichannel blood flow frequency spectrum signal fused is believed at target blood flow frequency spectrum all the way
Number, target blood flow frequency spectrum signal is the signal of final output.Specifically, the fusion of signal can be folded using being averaged, weighting
Add, be maximized or take the mode of intermediate value.
Optionally, above-mentioned steps 207-208 may include:
(A1) it obtains believing per branch's blood flow all the way to wall filtering and FFT processing is carried out per branch's blood flow signal all the way respectively
Number blood flow frequency spectrum signal；
(A2) the blood flow frequency spectrum signal weighting per branch's blood flow signal all the way is superimposed, obtains the target blood flow frequency
Spectrum signal.
For above-mentioned steps A1-A2, it should be noted that different branch's blood flow signals when carrying out wall filtering processing,
Different wall filters, such as the wall filter that cutoff frequency is different with intermediate zone steep can be respectively adopted.
Optionally, above-mentioned steps 207-208 may include:
(B1) wall filtering processing is carried out to per branch's blood flow signal all the way respectively；
(B2) wall filtering treated each road branch blood flow signal is grouped, obtains multiple groups branch blood flow signal；
(B3) each group of branches blood flow signal is fused into blood flow signal all the way respectively, obtains each group of branches blood flow signal
Fusion signal；
(B4) FFT processing is carried out to the fusion signal of each group of branches blood flow signal respectively, obtains each group of branches
The blood flow frequency spectrum signal of blood flow signal；
(B5) the blood flow frequency spectrum signal weighting of each group of branches blood flow signal is superimposed, obtains the target blood flow frequency
Spectrum signal.
For above-mentioned steps (B1), each road branch blood flow signal can carry out wall filtering using the wall filter of different performance
Processing.For above-mentioned steps (B2), the grouping of signal, such as random grouping, sequence can be carried out according to preset any regular
Grouping etc..It for above-mentioned steps (B1) to (B5), is illustrated below: assuming that sharing 10 tunnel branch blood flow signals, distinguishing first
Wall filtering processing is carried out to per branch's blood flow signal all the way；Then the grouping of signal is carried out, for example 10 road signals are randomly divided into
3 group of branches blood flow signals, first group includes 4 tunnel branch blood flow signals, and second group includes 3 tunnel branch blood flow signals, third group
Include 3 tunnel branch blood flow signals；Then first group of 4 tunnel branch blood flow signals are merged into (such as weighted superposition) Cheng Yilu blood flow
Signal obtains the fusion signal of the first group of branches blood flow signal；Second group of 3 tunnel branch blood flow signals are fused into blood flow all the way
Signal obtains the fusion signal of the second group of branches blood flow signal；3 tunnel branch blood flow signals of third group are fused into blood flow all the way
Signal obtains the fusion signal of third component branch blood flow signal；Then respectively to the fusion signal of each group of branches blood flow signal
FFT processing is carried out, the blood flow frequency spectrum signal of each group of branches blood flow signal is obtained；Finally by this 3 blood flow frequency spectrum signal weightings
Superposition, obtains the target blood flow frequency spectrum signal of final output.Aforesaid way A1-A2 has their own advantages compared with mode B1-B5, the former
The effect for promoting signal-to-noise ratio is more preferable, and the latter can reduce calculation amount relative to the former, reduce the burden of system.
It should be noted that being not limited to the secondary fusion of signal in mode B1-B5, and signal fused and other letters
Order between number processing step also can adjust.For example, grouping and fusion treatment more than twice can be done to signal；It can be first
The signal fused of first time is done, then carries out wall filtering processing etc. again.
209, pulse Doppler detection is carried out using the predetermined pulse repetition rate, obtains doppler blood flow signal.
Step 209 is identical as step 106, specifically can refer to the related description of step 106.
In embodiments of the present invention, the predetermined pulse repetition rate of pulse Doppler detection is obtained；According to the default arteries and veins
Rush the surface temperature rise that repetition rate calculates ultrasonic probe；If the surface temperature rise is less than preset upper limit value, calculate when described
The highest pulse recurrence frequency that surface temperature rise can reach when improving to the upper limit value；Using the highest pulse recurrence frequency
Pulse Doppler detection is carried out, doppler blood flow signal is obtained；Down-sampled processing is carried out to the doppler blood flow signal, is obtained
Multiple branches blood flow signal；Signal processing is carried out to the multiple branches blood flow signal, obtains multichannel blood flow frequency spectrum signal；By institute
Multichannel blood flow frequency spectrum signal fused is stated into target blood flow frequency spectrum signal all the way.Compared with one embodiment of the invention, this reality
Example is applied after promoting pulse recurrence frequency and obtaining doppler blood flow signal, down-sampled processing also is carried out to doppler blood flow signal
Multiple branches blood flow signal is obtained, this multiple branches blood flow signal is then subjected to signal processing and fusion again, is obtained final defeated
Blood flow frequency spectrum signal out.It is arranged in this way, on the one hand improves the signal-to-noise ratio of signal, on the other hand blood flow is enabled to believe
Number displaying make full use of the scale range of waveform diagram and the boundary without departing from scale, convenient for testing staff check blood flow believe
Number.
Referring to Fig. 3, a kind of third embodiment packet of Doppler's detection method of blood flow signal in the embodiment of the present invention
It includes:
301, the predetermined pulse repetition rate of pulse Doppler detection is obtained；
302, the surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；
303, judge whether the surface temperature rise is less than preset upper limit value；
If the surface temperature rise is less than preset upper limit value, 304-309 is thened follow the steps, it is no to then follow the steps 310.
304, the highest pulse recurrence frequency that can reach when the surface temperature rise is improved to the upper limit value is calculated；
305, pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal；
Step 301-305 is identical as step 101-105, specifically can refer to the related description of step 101-105.
306, down-sampled processing is carried out to the doppler blood flow signal, obtains multiple branches blood flow signal；
Step 306 is identical as step 206, specifically can refer to the related description of step 206.
307, wall filtering and auto-correlation processing are carried out to per branch's blood flow signal all the way respectively, obtained per branch's blood flow all the way
Blood flow velocity, variance and the energy of signal；
In embodiments of the present invention, it needs to obtain color flow Doppler image.Color flow Doppler image is usually
LDA signal processor is carried out with autocorrelation technique, the blood flow signal that autocorrelation technique obtains is folded in real time after coloud coding
Add on 2d, to form Color Doppler Ultrasonic picture.Therefore, in step 307, divide all the way every respectively
Branch blood flow signal carries out wall filtering and auto-correlation processing, obtains the blood flow velocity, variance and energy per branch's blood flow signal all the way.
308, weighted superposition is distinguished per the blood flow velocity, variance of branch's blood flow signal all the way and energy by described, obtain mesh
Mark blood flow velocity, variance and the energy of blood flow signal；
After obtaining per the blood flow velocity, variance of branch's blood flow signal all the way and energy, by described per branch's blood all the way
The blood flow velocity, variance and energy for flowing signal distinguish weighted superposition, obtain the blood flow velocity, variance and energy of target blood flow signal
Amount.Assuming that sharing 3 tunnel branch blood flow signals, then by the blood flow velocity weighted superposition of 3 tunnel branch blood flow signals, target blood flow is obtained
The blood flow velocity of signal；The variance weighted of 3 tunnel branch blood flow signals is superimposed, the variance of target blood flow signal is obtained；By 3 roads point
The energy weighted superposition of branch blood flow signal, obtains the energy of target blood flow signal.
309, color flow Doppler image is constructed according to the blood flow velocity, variance and energy of the target blood flow signal；
Finally, color flow Doppler can be constructed according to the blood flow velocity, variance and energy of the target blood flow signal
Image.Specific color flow Doppler picture construction process can refer to the prior art, and details are not described herein.
310, pulse Doppler detection is carried out using the predetermined pulse repetition rate, obtains doppler blood flow signal.
Step 310 is identical as step 106, specifically can refer to the related description of step 106.
In embodiments of the present invention, the predetermined pulse repetition rate of pulse Doppler detection is obtained；According to the default arteries and veins
Rush the surface temperature rise that repetition rate calculates ultrasonic probe；If the surface temperature rise is less than preset upper limit value, calculate when described
The highest pulse recurrence frequency that surface temperature rise can reach when improving to the upper limit value；Using the highest pulse recurrence frequency
Pulse Doppler detection is carried out, doppler blood flow signal is obtained；Down-sampled processing is carried out to the doppler blood flow signal, is obtained
Multiple branches blood flow signal；Respectively to often branch's blood flow signal carries out wall filtering and auto-correlation processing all the way, obtain often dividing all the way
Blood flow velocity, variance and the energy of branch blood flow signal；By the blood flow velocity, variance and energy per branch's blood flow signal all the way
Weighted superposition respectively, obtains the blood flow velocity, variance and energy of target blood flow signal；According to the blood flow of the target blood flow signal
Speed, variance and energy construct color flow Doppler image.The embodiment of the present invention is applied to color flow Doppler mode, leads to
The auto-correlation processing to multiple branches blood flow signal is crossed, the blood flow velocity, variance and energy per branch's blood flow signal all the way are obtained,
Then weighted superposition is distinguished to per the blood flow velocity, variance of branch's blood flow signal all the way and energy again, it finally can be according to weighting
The result of superposition constructs color flow Doppler image.Clearer color flow Doppler figure can be obtained using this method
Picture improves the detection performance to small blood flow.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-mentioned each embodiment, respectively
The execution sequence of process should be determined by its function and internal logic, and the implementation process without coping with the embodiment of the present invention constitutes any
It limits.
A kind of Doppler's detection method of blood flow signal is essentially described above, it below will be to a kind of the how general of blood flow signal
Detection device is strangled to be described.
Referring to Fig. 4, a kind of one embodiment of Doppler's detection device of blood flow signal includes: in the embodiment of the present invention
Predetermined pulse repetition rate obtains module 401, for obtaining the predetermined pulse repetition rate of pulse Doppler detection；
Detecting head surface temperature rise computing module 402, for calculating the table of ultrasonic probe according to the predetermined pulse repetition rate
Face temperature rise；
Highest pulse recurrence frequency computing module 403 calculates if being less than preset upper limit value for the surface temperature rise
The highest pulse recurrence frequency that can reach when the surface temperature rise is improved to the upper limit value；
Pulse Doppler detection module 404, for carrying out pulse Doppler detection using the highest pulse recurrence frequency,
Obtain doppler blood flow signal.
Further, Doppler's detection device of the blood flow signal can also include:
Down-sampled processing module obtains multiple branches blood for carrying out down-sampled processing to the doppler blood flow signal
Signal is flowed, is equal to the predetermined pulse repetition rate per the sample frequency of branch's blood flow signal all the way；
Signal processing module obtains multichannel blood flow frequency spectrum for carrying out signal processing to the multiple branches blood flow signal
Signal；
Signal fused module is used for the multichannel blood flow frequency spectrum signal fused into target blood flow frequency spectrum signal all the way.
Further, the signal processing module may include:
Wall filtering and fft processing unit, for handling respectively per the progress wall filtering of branch's blood flow signal all the way and FFT,
Obtain the blood flow frequency spectrum signal per branch's blood flow signal all the way；
The signal fused module may include:
Weighted superposition unit is obtained for the blood flow frequency spectrum signal weighting per branch's blood flow signal all the way to be superimposed
The target blood flow frequency spectrum signal.
The embodiment of the present invention also provides a kind of terminal device, including memory, processor and is stored in the memory
In and the computer program that can run on the processor, the processor realize such as Fig. 1 when executing the computer program
The step of Doppler's detection method of any one blood flow signal indicated to Fig. 3.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the computer-readable recording medium storage has
Computer program is realized when the computer program is executed by processor such as any one blood flow signal that Fig. 1 to Fig. 3 is indicated
The step of Doppler's detection method.
Fig. 5 is the schematic diagram for the terminal device that one embodiment of the invention provides.As shown in figure 5, the terminal of the embodiment is set
Standby 5 include: processor 50, memory 51 and are stored in the meter that can be run in the memory 51 and on the processor 50
Calculation machine program 52.The processor 50 realizes Doppler's detection of above-mentioned each blood flow signal when executing the computer program 52
Step in the embodiment of method, such as step 101 shown in FIG. 1 is to 106.Alternatively, the processor 50 executes the calculating
The function of each module/unit in above-mentioned each Installation practice, such as the function of module 401 to 404 shown in Fig. 4 are realized when machine program 52
Energy.
The computer program 52 can be divided into one or more module/units, and one or more of modules/
Unit is stored in the memory 51, and is executed by the processor 50, to complete the present invention.One or more of moulds
Block/unit can be the series of computation machine program instruction section that can complete specific function, the instruction segment by describe it is described based on
Implementation procedure of the calculation machine program 52 in the terminal device 5.
The terminal device 5 can be various types of mobile phones, desktop PC, notebook, palm PC and cloud
Server etc. calculates equipment.The terminal device may include, but be not limited only to, processor 50, memory 51.Those skilled in the art
Member is appreciated that Fig. 5 is only the example of terminal device 5, does not constitute the restriction to terminal device 5, may include than diagram
More or fewer components perhaps combine certain components or different components, such as the terminal device 5 can also include
Input-output equipment, network access equipment, bus etc..
Alleged processor 50 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 51 can be the internal storage unit of the terminal device 5, such as the hard disk or interior of terminal device 5
It deposits.The memory 51 is also possible to the External memory equipment of the terminal device 5, such as be equipped on the terminal device 5
Plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card dodge
Deposit card (Flash Card) etc..Further, the memory 51 can also both include the storage inside list of the terminal device 5
Member also includes External memory equipment.The memory 51 is for storing needed for the computer program and the terminal device
Other programs and data.The memory 51 can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the module or unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be with
In conjunction with or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-described embodiment side
All or part of the process in method can also instruct relevant hardware to complete, the computer by computer program
Program can be stored in a computer readable storage medium, and the computer program is when being executed by processor, it can be achieved that above-mentioned each
The step of a embodiment of the method.Wherein, the computer program includes computer program code, and the computer program code can
Think source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium can be with
It include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk, light that can carry the computer program code
Disk, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random
Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that the computer
The content that readable medium includes can carry out increase and decrease appropriate according to the requirement made laws in jurisdiction with patent practice, such as
In certain jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and telecommunications letter
Number.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of Doppler's detection method of blood flow signal characterized by comprising
Obtain the predetermined pulse repetition rate of pulse Doppler detection；
The surface temperature rise of ultrasonic probe is calculated according to the predetermined pulse repetition rate；
If the surface temperature rise is less than preset upper limit value, calculating can when the surface temperature rise is improved to the upper limit value
The highest pulse recurrence frequency reached；
Pulse Doppler detection is carried out using the highest pulse recurrence frequency, obtains doppler blood flow signal.
2. Doppler's detection method of blood flow signal as described in claim 1, which is characterized in that obtaining doppler flow inaging letter
After number, further includes:
Down-sampled processing is carried out to the doppler blood flow signal, obtains multiple branches blood flow signal, is believed per branch's blood flow all the way
Number sample frequency be equal to the predetermined pulse repetition rate；
Signal processing is carried out to the multiple branches blood flow signal, obtains multichannel blood flow frequency spectrum signal；
By the multichannel blood flow frequency spectrum signal fused at target blood flow frequency spectrum signal all the way.
3. Doppler's detection method of blood flow signal as claimed in claim 2, which is characterized in that described to the multiple branches
Blood flow signal carries out signal processing
Respectively to wall filtering and FFT processing is carried out per branch's blood flow signal all the way, the blood flow per branch's blood flow signal all the way is obtained
Spectrum signal；
It is described to include: at target blood flow frequency spectrum signal all the way by the multichannel blood flow frequency spectrum signal fused
By the blood flow frequency spectrum signal weighting superposition per branch's blood flow signal all the way, the target blood flow frequency spectrum signal is obtained.
4. Doppler's detection method of blood flow signal as claimed in claim 2, which is characterized in that described to the multiple branches
Blood flow signal carries out signal processing
Wall filtering processing is carried out to per branch's blood flow signal all the way respectively；
By wall filtering treated each road branch blood flow signal grouping, multiple groups branch blood flow signal is obtained；
Each group of branches blood flow signal is fused into blood flow signal all the way respectively, obtains the fusion letter of each group of branches blood flow signal
Number；
FFT processing is carried out to the fusion signal of each group of branches blood flow signal respectively, obtains each group of branches blood flow signal
Blood flow frequency spectrum signal；
It is described to include: at target blood flow frequency spectrum signal all the way by the multichannel blood flow frequency spectrum signal fused
The blood flow frequency spectrum signal weighting of each group of branches blood flow signal is superimposed, the target blood flow frequency spectrum signal is obtained.
5. Doppler's detection method of the blood flow signal as described in any one of claim 2 to 4, which is characterized in that if described
Pulse Doppler is detected as color flow Doppler detection, then Doppler's detection method further include:
Wall filtering and auto-correlation processing are carried out to per branch's blood flow signal all the way respectively, obtains the blood per branch's blood flow signal all the way
Flow velocity degree, variance and energy；
Weighted superposition is distinguished per the blood flow velocity, variance of branch's blood flow signal all the way and energy by described, obtains target blood flow letter
Number blood flow velocity, variance and energy；
Color flow Doppler image is constructed according to the blood flow velocity, variance and energy of the target blood flow signal.
6. a kind of Doppler's detection device of blood flow signal characterized by comprising
Predetermined pulse repetition rate obtains module, for obtaining the predetermined pulse repetition rate of pulse Doppler detection；
Detecting head surface temperature rise computing module, for calculating the surface temperature rise of ultrasonic probe according to the predetermined pulse repetition rate；
Highest pulse recurrence frequency computing module calculates if being less than preset upper limit value for the surface temperature rise when described
The highest pulse recurrence frequency that surface temperature rise can reach when improving to the upper limit value；
Pulse Doppler detection module obtains more for carrying out pulse Doppler detection using the highest pulse recurrence frequency
General Le blood flow signal.
7. Doppler's detection device of blood flow signal as claimed in claim 6, which is characterized in that further include:
Down-sampled processing module obtains multiple branches blood flow letter for carrying out down-sampled processing to the doppler blood flow signal
Number, the predetermined pulse repetition rate is equal to per the sample frequency of branch's blood flow signal all the way；
Signal processing module obtains multichannel blood flow frequency spectrum signal for carrying out signal processing to the multiple branches blood flow signal；
Signal fused module is used for the multichannel blood flow frequency spectrum signal fused into target blood flow frequency spectrum signal all the way.
8. Doppler's detection device of blood flow signal as claimed in claim 7, which is characterized in that the signal processing module packet
It includes:
Wall filtering and fft processing unit, for wall filtering and FFT processing is carried out per branch's blood flow signal all the way, obtaining respectively
Per the blood flow frequency spectrum signal of branch's blood flow signal all the way；
The signal fused module includes:
Weighted superposition unit obtains described for the blood flow frequency spectrum signal weighting per branch's blood flow signal all the way to be superimposed
Target blood flow frequency spectrum signal.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 5 when executing the computer program
Any one of described in blood flow signal Doppler's detection method the step of.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In blood flow signal of the realization as described in any one of claims 1 to 5 is how general when the computer program is executed by processor
The step of strangling detection method.
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