CN105997142A - Ultrasonic system transmitting signal compositing and imaging method and device - Google Patents
Ultrasonic system transmitting signal compositing and imaging method and device Download PDFInfo
- Publication number
- CN105997142A CN105997142A CN201610407721.3A CN201610407721A CN105997142A CN 105997142 A CN105997142 A CN 105997142A CN 201610407721 A CN201610407721 A CN 201610407721A CN 105997142 A CN105997142 A CN 105997142A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- transmitting
- transmitting signal
- anglec
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5207—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of raw data to produce diagnostic data, e.g. for generating an image
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Computational Mathematics (AREA)
- Pathology (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The embodiment of the invention discloses an ultrasonic system transmitting signal compositing and imaging method and device. The ultrasonic system transmitting signal compositing method comprises the steps that screening is performed within the bandwidth range of a probe of an ultrasonic system; for each transmitting signal, the transmitting signal is encoded according to the frequency band range obtained by the center frequency of the transmitting signal; all the transmitting signals are mixed to generate a mixed transmitting signal. The bandwidth of the probe can be sufficiently utilized, and repeated transmitting is not needed, so that the defect that the effect is not obvious due to the fact that the transmitting frequency band is excessively narrow in the prior art and the defect that the time resolution is lowered due to repeated transmitting are effectively overcome.
Description
Technical field
The present invention relates to ultrasonic therapy technical field of imaging, particularly relate to a kind of ultrasonic system and launch signal
Compound, formation method and device.
Background technology
In ultrasonic medical imaging system, the ultrasound wave composition of different frequency is had in various degree by tissue
Decay, although high frequency imaging image is finer and smoother, but owing to decay is very fast, penetrates and be very restricted,
Low-frequency image can obtain and preferably penetrate, but its resolution is poor.Frequency multiplexed imaging technique utilizes this exactly
One characteristic, is overlapped being combined by the signal of different frequency bands, improves and strengthen the spatial discrimination of ultrasonoscopy
Rate and the uniformity consistency of general image.
Frequency multiplexed imaging technique typically has the fundamental signal of several frequency by transmitting, gathers difference simultaneously
The ultrasound echo signal of frequency bandwidth, is then overlapped the signal of these different frequency bands, in the time of guarantee
While resolution, thus improve picture quality.
In currently existing frequency multiplexed imaging technique, can be divided into two kinds by its implementation, the first realizes
Mode is: launches at the physical scan line position set and once has certain bandwidth ultrasound wave, then equally
Position receives the ultrasound echo signal of this time, will receive echo-signal through different temporal frequency curves
Solve mediation Filtering Processing and obtain different i/q signals, finally these i/q signals are carried out linear superposition,
Thus obtain the picture signal of frequency multiplexed.The method of this frequency multiplexed imaging ensure that ultrasonoscopy time
Between resolution, but its compound frequency content is owing to being limited by transmitted waveform, is typically limited to certain
In narrow bandwidth range, it is impossible to effective utilization probe bandwidth, the space of the ultrasonoscopy obtained after frequency multiplexed is divided
The uniformity consistency of resolution and general image is not significantly improved.The second implementation is: setting
Fixed Same Physical scan line position launches repeated ultrasonic ripple, and the ultrasonic frequency every time launched is different, hereafter,
The reception of corresponding repeated ultrasonic echo-signal it is also carried out at this physical scan line position, and receiving not
Different I/Q is obtained through the mediation Filtering Processing that solves of corresponding temporal frequency curve with echo-signal
Signal, finally carries out linear superposition these i/q signals, thus obtains the picture signal of frequency multiplexed.This
Although the method for kind of frequency multiplexed imaging can preferably improve the spatial resolution of ultrasonoscopy and general image
Uniformity consistency, but sacrifices the temporal resolution of ultrasonoscopy, and heart etc. is moved internal organs faster can not
It is suitable for.
Summary of the invention
In view of this, the embodiment of the present invention provide compound, formation method that a kind of ultrasonic system launches signal and
Device, cannot ensure spatial resolution and temporal resolution solving ultrasonic imaging in prior art simultaneously
Technical problem.
First aspect, embodiments provides the complex method of a kind of ultrasonic system signal, including:
In the bandwidth range of the probe of described ultrasonic system, screening obtains the mid frequency of each transmitting signal；
For each transmitting signal, according to the mid frequency of described transmitting signal, described transmitting signal is compiled
Code；
All transmitting signals are mixed, generates mixing and launch signal.
Second aspect, the embodiment of the present invention additionally provides the formation method of a kind of ultrasonic system composite signal, bag
Include:
Receive the echo-signal of ultrasound wave composite signal, and by the echo letter of described ultrasound wave coding composite signal
Number be converted to digital signal and described digital signal is carried out Beam synthesis, generate radiofrequency signal；
To described radiofrequency signal anti-aliasing and decoding process, and by inphase-quadrature modem, generate inphase quadrature
Signal；
Carry out imaging processing according to the signal after inphase-quadrature modem, generate ultrasonography.
The third aspect, the embodiment of the present invention additionally provides the set composite of a kind of ultrasonic system signal, including:
Mid frequency screening module, in the bandwidth range of the probe of described ultrasonic system, screening obtains
The mid frequency of each transmitting signal；
Coding module, for for each transmitting signal, obtains according to the mid frequency of described transmitting signal
Described transmitting signal is encoded by frequency band range；
Mixing module, for mixing all transmitting signals, generates mixing and launches signal.
Fourth aspect, the embodiment of the present invention additionally provides the imaging device of a kind of ultrasonic system composite signal, bag
Include:
Modular converter, receives the echo-signal of ultrasound wave composite signal, and by compound for described ultrasound wave coding letter
Number echo-signal be converted to digital signal；
Radiofrequency signal generation module, for described digital signal carries out Beam synthesis, generates radiofrequency signal；
Orthogonal signalling generation module, is used for described radiofrequency signal anti-aliasing and decoding process, and by orthogonal
Modulation /demodulation, generates inphase quadrature signal；
Image-forming module, carries out imaging processing after carrying out the signal after inphase-quadrature modem being combined, generates
Ultrasonography.
The ultrasonic system that the embodiment of the present invention provides launches compound, formation method and the device of signal, by right
The signal of launching of different emission bands carries out different codings, is sent out by ultrasonic transducer after being then mixed
Penetrate, go multichannel anti-aliasing to process the echo-signal received, then to the multiple signals after anti-aliasing
It is decoded.The bandwidth of probe can be made full use of, and need not repeatedly launch, thus efficiently solve and work as
The shortcoming of the DeGrain caused owing to emission band is narrow present in front technology and repeatedly launching causes
The defect that temporal resolution declines.
Accompanying drawing explanation
The detailed description that non-limiting example is made made with reference to the following drawings by reading, the present invention
Other features, objects and advantages will become more apparent upon:
Fig. 1 is the schematic flow sheet of the complex method of the ultrasonic system signal that the embodiment of the present invention one provides；
Fig. 2 is the schematic flow sheet of the complex method of the ultrasonic system signal that the embodiment of the present invention two provides；
Fig. 3 is the schematic flow sheet of the complex method of the ultrasonic system signal that the embodiment of the present invention three provides
Fig. 4 is the schematic flow sheet of the formation method of the ultrasonic system composite signal that the embodiment of the present invention four provides；
Fig. 5 is the schematic flow sheet of the formation method of the ultrasonic system composite signal that the embodiment of the present invention five provides；
Fig. 6 is the schematic flow sheet of the formation method of the ultrasonic system composite signal that the embodiment of the present invention six provides；
Fig. 7 is the structural representation of the set composite of the ultrasonic system signal that the embodiment of the present invention seven provides；
Fig. 8 is the structural representation of the imaging device of the ultrasonic system composite signal that the embodiment of the present invention eight provides.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this
Specific embodiment described by place is used only for explaining the present invention, rather than limitation of the invention.The most also need
Be noted that for the ease of describing, accompanying drawing illustrate only part related to the present invention and not all in
Hold.
Embodiment one
The schematic flow sheet of the complex method of the ultrasonic system signal that Fig. 1 provides for the embodiment of the present invention one, this
Embodiment is applicable to the scanning signal situation about being combined launching ultrasonic system, and the method can be by
The set composite of ultrasonic system signal performs, and this device can be realized by software/hardware mode, and can be integrated in
In corresponding ultrasonic wave detecting system.
See Fig. 1, the complex method of described ultrasonic system signal, including:
S110, in the bandwidth range of the probe of described ultrasonic system, screening obtains in each transmitting signal
Frequency of heart.
In traditional single pulse excitation ultrasonic image-forming system, the transducer wafer of probe is launched by pulse excitation
Ultrasound wave, the axial resolution of image depends on the impulse response of transducer.Launched can be one relatively
Long pulse signal for a long time.And in coding ultrasonic image-forming system system, pumping signal can be necessarily to hold
The continuous signal of continuous time.The persistent period of pumping signal is longer than the pulse response time of transducer, thus
The energy that signal carries can be increased, improve the mean power of ultrasonic signal.Exemplary, use basis sequence
Row modulation composite signal.In the present embodiment, according in the bandwidth of ultrasound probe, can be with choice of modulation band
Wide be respectively (BW0, BW1 ..., BW (N-1)), modulation duration be respectively (T0, T1 ..., T (N-1)).According to
The technical specification feature of above-mentioned probe, can screen the mid frequency obtaining each transmitting signal.
S120, for each transmitting signal, the frequency band range obtained according to the mid frequency of described transmitting signal
Described transmitting signal is encoded.
Exemplary, can use PE system that each transmitting signal is encoded, phase code side
Formula is also called binary coding mode.It is by launching positive negative pulse stuffing, the side of the phase place of modulate emission waveform
Formula realizes coding.In the present embodiment, can realize in the following way the coding launching signal:
Base_excitation (i)=cos (2*pi* (fstart (i) * t+BW (i)/2/TimeOfFM
*t.^2))；Wherein, base_excitation (i) is coding waveforms, and i is for launching signal sequence number, fstart (i)
For the initial frequency of each transmitting signal, BW (i) is the modulation bandwidth launching signal, and TimeOfFM is coding letter
Number modulation duration, t=(0 ..., 1/Tx_fs, 2/Tx_fs ... TimeOfFM).
All transmitting signals are mixed by S130, generate mixing and launch signal.
Exemplary, can be in the way of using addition of waveforms, it is achieved to the mixing launching signal.Such as, adopt
Waveform with following manner mixing transmitting signal:
WaveForm=excitation (k1)+excitation (k2)+...+excitation (Kn),
Wherein excitation (ki) is to launch the transmitting signal waveform that signal sequence number is corresponding.
The complex method of the ultrasonic system signal that the present embodiment provides, by believing the transmitting of different emission bands
Number carry out different codings.The bandwidth of probe can be made full use of, and need not repeatedly launch, thus effectively
Solve the shortcoming of the DeGrain caused owing to emission band is narrow present in current techniques and repeatedly send out
Penetrate the defect that the temporal resolution caused declines.
In an optional embodiment of the present embodiment, by described for each transmitting signal, according to described
Described transmitting signal is encoded by the mid frequency launching signal, is specifically optimized for: launch letter according to described
Number mid frequency determine the waveform of described transmitting signal；The waveform of described transmitting signal is carried out windowing process.
Each transmitting signal can be encoded according to frequency, generate the waveform launching signal.Owing to launching signal
Waveform be impulse waveform, it is not necessary to be suitable for probe launch.In the present embodiment, by windowed function to sending out
The waveform penetrating signal processes, and pulse signal is processed sinusoidal or cosine waveform, more to meet probe
Mission need.
Embodiment two
Fig. 2 is the schematic flow sheet of the complex method of the ultrasonic system signal that the embodiment of the present invention two provides.This
Embodiment is based on above-described embodiment, by described in the bandwidth range of the probe of described ultrasonic system, and sieve
Choosing obtains the mid frequency of each transmitting signal, is specifically optimized for: determine fractional Fourier according to modulation bandwidth
The anglec of rotation of the energy optimal accumulated of transform domain；Root according to the described anglec of rotation according to the described anglec of rotation because of
Son calculates the bandwidth range of described each transmitting signal.
Accordingly, the complex method of the ultrasonic system signal that the present embodiment is provided, specifically include:
S210, determines the anglec of rotation of the energy optimal accumulated of fractional Fourier transform domain according to modulation bandwidth.
Multiple pulse signals that ultrasonic system is launched, can regard as periodic signal, believe for this cycle
Number, have the property that signal energy is gradually assembled along with the fractional order territory of signal is gradually increased, to frequency
Territory shows as impulse function.Based on this characteristic, unique shadow can be determined according to Fourier Transform of Fractional Order
Ring factor rotation angular factors.
Concrete, the anglec of rotation factor can be calculated by equation below:
Aifa=1-2/pi*atan (Tx_fs/BandWidthOfFM)；Wherein, aifa be the anglec of rotation because of
Son；Tx_fs represents the sample frequency that system is launched；The modulation band of BandWidthOfFM presentation code signal
Wide.
S220, calculates described each transmitting signal according to the described anglec of rotation according to the described anglec of rotation factor
Bandwidth range.
For the probe of any one ultrasonic system, its driving frequency can set according to different diagnostic purposes
It is set to different frequencies.And driving frequency is when the mid frequency set, and work efficiency is the highest.Scanning is believed
Number set in each scanning signal frequency should probe mid frequency certain limit in.And can basis
In scanning signal set, each relative frequency of scanning signal and the mid frequency of probe are calculated scanning signal
The frequency of each scanning signal in set.Concrete, can be calculated by equation below:
Several line chart pictures crossing at 0 can be shown as in time-domain and frequency-domain plane for scanning signal set,
The line segment of the most each mistake 0 represents the relative frequency of each scanning signal in scanning signal set.
Concrete, can be calculated by equation below:
Bw_tx (i)=4*nZ*abs (sin (aifa*pi/2))/Ti；NZ is constant, typically takes 1, Ti
For modulation duration；
When fi is center probe frequency, launching signal in the low-limit frequency of fractional Fourier transform domain is
Lp (i)=fi-Bw_tx (i)/2, highest frequency is Hp (i)=fi+Bw_tx (i)/2.
S230, for each transmitting signal, the frequency band range obtained according to the mid frequency of described transmitting signal
Described transmitting signal is encoded.
All transmitting signals are mixed by S240, generate mixing and launch signal.
The present embodiment is by the rotation of the energy optimal accumulated by determining fractional Fourier transform domain according to modulation bandwidth
Gyration；Calculate the band of described each transmitting signal according to the described anglec of rotation factor according to the described anglec of rotation
Wide scope.The bandwidth range of each transmitting signal can be determined according to the signal of launching that probe is launched.
Embodiment three
Fig. 3 is the schematic flow sheet of the complex method of the ultrasonic system signal that the embodiment of the present invention three provides.This
Embodiment based on above-described embodiment, the frequency band range that will obtain according to the mid frequency of described transmitting signal
Described transmitting signal is encoded, is specifically optimized for: according to the bandwidth range between adjacent transmission signal with
The difference of attenuation quotient chooses the mid frequency launching signal, and encodes the transmitting signal chosen.
Accordingly, the complex method of the ultrasonic system signal that the present embodiment is provided, specifically include:
S310, determines the anglec of rotation of the energy optimal accumulated of fractional Fourier transform domain according to modulation bandwidth.
S320, calculates described each transmitting signal according to the described anglec of rotation according to the described anglec of rotation factor
Bandwidth range.
S330, chooses transmitting signal according to the difference of the bandwidth range between adjacent transmission signal Yu attenuation quotient
Mid frequency, and the transmitting signal chosen is encoded.
For adjacent transmitting signal, the next highest frequency launching signal launches signal with upper one
A frequency band range should be provided with between low frequency, prevent adjacent emission signal frequency from producing overlapping, it is ensured that.
In the present embodiment, by according between the bandwidth range between adjacent transmission signal and the difference of attenuation quotient
Relation choose and suitably launch signal.Exemplary, when the twiddle factor of fractional fourier transform is
During aifa (i), the i-th-1 adjacent frequency content can be obtained and launch highest frequency and the i+1 of signal
The low-limit frequency of frequency:
As aifa (i-1)==aifa (i): Hp (i-1)=f (i-1)+2*nZ*
abs(sin(aifa(i)*pi/2))/T(i-1)。
As aifa (i-1)！During=aifa (i): Hp (i-1)=f (i-1)+(BW (i-1)/sin (aifa (i-1)
*pi/2)*abs(sin(aifa(i-1)*pi/2–aifa(i)*pi/2)))/2；Wherein abs () represents
Take absolute value.
As aifa (i+1)==aifa (i): Lp (i+1)=f (i+1)-2*nZ*
abs(sin(aifa(i)*pi/2))/T(i+1)。
As aifa (i+1)！During=aifa (i): Lp (i+1)=f (i+1)-(BW (i+1)/sin (aifa (i+1)
*pi/2)*abs(sin(aifa(i+1)*pi/2–aifa(i)*pi/2)))/2；
In order to ensure to extract at fractional Fourier transform domain, it is necessary to meet following two condition:
Hp (i)≤Lp (i+1) Lp (i+1) * D*f_Atten；
Lp (i) Lp (i) * D*f_Atten >=Hp (i-1)
D represents the current scanning degree of depth, and f_Atten represents the frequency attenuation quotient with change in depth.
Choose the transmitting signal of the mid frequency meeting condition above, carry out coded excitation；On not meeting
The transmitting signal of the mid frequency of noodles part, does not carry out coded excitation.
The present embodiment by the frequency band range that will obtain according to the mid frequency of described transmitting signal to described transmitting
Signal encodes, and is specifically optimized for: according to the bandwidth range between adjacent transmission signal and attenuation quotient
Difference chooses the mid frequency launching signal, and encodes the transmitting signal chosen.Can avoid adjacent
Launch the overlapping of signal, it is possible to extract from fractional order Fourier domain of variation.
Embodiment four
The schematic flow sheet of the formation method of the ultrasonic system composite signal that Fig. 4 provides for the embodiment of the present invention four,
The present embodiment is applicable to the situation to ultrasonic system compound scan image formation, and the method can be by ultrasonic
The imaging of system composite signal performs, and this device can be realized by software/hardware mode, and can be integrated in corresponding
Ultrasonic wave detecting system in.
See Fig. 4, described ultrasonic system composite signal, including:
S410, receives ultrasound wave coded echo signal, and described ultrasound wave coded echo signal is converted to number
Word signal.
Ultrasound probe in ultrasonic system is used for launching ultrasound wave and receiving ultrasonic echo.And pass through ripple
The amplification of echo, filtering and Analog-digital Converter, obtain digitalized ultrasonic ripple echo；Described reception device can
To include the low noise amplifier circuit, Anti-aliasing Filter Circuits and the D/A conversion circuit that are linked in sequence.Institute
State low noise amplifier circuit to be connected with described ultrasound probe.
S420, carries out Beam synthesis by described digital signal, generates radiofrequency signal.
Beam synthesis refer to the multispot array arrange certain geometries respectively shakes the output of unit through postponing,
After weighted sum summation etc. out, output is made to have space directivity.Exemplary, delay stack can be used
Method, it is thus achieved that ultrasound RF data.
S430, to described radiofrequency signal anti-aliasing and decoding process, and by quadrature demodulation, is just generating homophase
Hand over signal.
Exemplary, anti-aliasing filtering can be used to remove device, on the premise of sample frequency is constant, by setting
The low pass filter of good frequency filters the frequency content being not required to occur.Owing to the signal of input includes I/Q two
Point, need by quadrature demodulation, to generate the orthogonal signalling of homophase.
S440, carries out imaging processing after carrying out the signal after inphase-quadrature modem being combined, generates ultrasonogram
Picture.
The signal of different link outputs is combined.Exemplary, can calculate in the following way:
Sig_Comp=a0*Sig_IQ (0)+a1*Sig_IQ (1)+...+a (N-1) * Sig_IQ (N-1), wherein,
A (i) represents weight coefficient.
The present embodiment is by carrying out anti-aliasing and decoding process to the ultrasonic signal received, by receive
Coding signal processing, generates inphase quadrature signal, it is possible to achieve the imaging to composite signal, ultrasonic improving
While the spatial resolution of image and the uniformity consistency of general image, it is ensured that the time of ultrasonoscopy divides
Resolution.
Embodiment five
Fig. 5 is the schematic flow sheet of the formation method of the ultrasonic system composite signal that the embodiment of the present invention five provides.
The present embodiment, based on above-described embodiment, by radiofrequency signal anti-aliasing, is specifically optimized for: to described radio frequency
Signal carries out the Fourier Transform of Fractional Order of the described anglec of rotation factor；Filtered radiofrequency signal is carried out inverse
Fourier Transform of Fractional Order.The anglec of rotation factor according to described Fourier Transform of Fractional Order sets corresponding band
The cut-off frequency of bandpass filter, and use fractional order Fourier described in the band-pass filter of described correspondence to become
Radiofrequency signal after changing；Filtered radiofrequency signal is carried out inverse Fourier Transform of Fractional Order.
See Fig. 5, the formation method of described ultrasonic system composite signal, including:
S510, receives ultrasound wave coded echo signal, and described ultrasound wave coded echo signal is converted to number
Word signal.
S520, carries out Beam synthesis by described digital signal, generates radiofrequency signal.
According to the bandwidth launching signal of the sample frequency and transmission that receive signal, S530, determines that described transmitting believes
Number the anglec of rotation factor of Fourier Transform of Fractional Order.
Exemplary, equation below can be used to calculate:
Aifa_rx (i)=1-2/pi*atan (Rx_fs/BW (i)), wherein Rx_fs represents adopting of reception signal
Sample frequency, BW (i) is to constitute the i-th of radiofrequency signal to launch the modulation bandwidth of echo-signal corresponding to signal.
S540, carries out the Fourier Transform of Fractional Order of the described anglec of rotation factor to described radiofrequency signal.
Exemplary, use ig_frft (i)=frft (sig, aifa_rx (i)) that radiofrequency signal is carried out mark
Rank Fourier transformation, frft (.) represents Fourier Transform of Fractional Order.
S550, sets corresponding band filter according to the anglec of rotation factor of described Fourier Transform of Fractional Order
Cut-off frequency, and use penetrating after Fourier Transform of Fractional Order described in the band-pass filter of described correspondence
Frequently signal.
For radiofrequency signal sig, the band filter that multiple mid frequency is different can be sent into.Filter logical for band
The cut-off of ripple device determines according to the bandwidth of the sample frequency and each transmitting signal that receive signal can be according to as follows
Mode calculates:
For i-th band filter, determine that this band filter can be become by the fractional order Fourier of signal
The anglec of rotation factor changed, exemplary, equation below can be used to calculate:
Aifa_rx (i)=1-2/pi*atan (Rx_fs/BW (i)), wherein, Rx_fs represents reception signal
Sample frequency, BW (i) is to constitute the i-th of radiofrequency signal to launch the modulation bandwidth of echo-signal corresponding to signal.
Accordingly, after corresponding fractional fourier transform, n-th Z excessively 0 band is a width of:
Bw_Sig_rx (i)=4*nZ*abs (sin (aifa_rx (i) * pi/2))/Ti；Wherein, nZ nZ is normal
Number, typically takes 1, and Ti is modulation duration；
Accordingly, the upper lower limiting frequency of corresponding band filter Hi is respectively as follows:
Bandfilter_lowFreq=f_bp_i-Bw_Sig_rx (i)/2 D*f_Atten* (f_bp_i-Bw_S
ig_rx(i)/2)；
Bandfilter_highFreq=f_bp_i+Bw_Sig_rx (i)/2；
Wherein, the mid frequency of f_bp_i band filter Hi；The maximum scanning degree of depth is represented for D；f_Atten
Represent the frequency attenuation quotient with change in depth；Multiple FIR or IIR can be designed according to above-mentioned cut-off frequency
Wave filter, and the radiofrequency signal input after conversion is filtered according to the band filter of above-mentioned requirements design.
S560, carries out inverse Fourier Transform of Fractional Order to filtered radiofrequency signal.
Exemplary, filtered radiofrequency signal is carried out inverse Fourier Transform of Fractional Order, makes filtered penetrating
Frequently signal recovers to original frequency.
S570, to the signal decoding process after anti-aliasing, and by quadrature demodulation, generates inphase quadrature signal.
S580, carries out imaging processing after carrying out the signal after inphase-quadrature modem being combined, generates ultrasonogram
Picture.
The present embodiment, by by radiofrequency signal anti-aliasing, is specifically optimized for: carry out described radiofrequency signal described
The Fourier Transform of Fractional Order of the anglec of rotation factor；The anglec of rotation according to described Fourier Transform of Fractional Order because of
Son sets the cut-off frequency of corresponding band filter, and uses described in the band-pass filter of described correspondence
Radiofrequency signal after Fourier Transform of Fractional Order；Filtered radiofrequency signal carries out inverse fractional order Fourier become
Change.Radiofrequency signal can be filtered by setting corresponding band filter, remove noise wave removing, improve multiple
Close the image quality of signal.
Embodiment six
Fig. 6 is the schematic flow sheet of the formation method of the ultrasonic system composite signal that the embodiment of the present invention five provides.
The present embodiment, based on above-described embodiment, by radiofrequency signal anti-aliasing, is specifically optimized for: to according to reception
The sample frequency of signal and the bandwidth launching signal of transmission determine that the fractional order Fourier of described transmitting signal becomes
The anglec of rotation factor changed；Calculate the system function of band filter；By described radiofrequency signal and bandpass filtering
The system function of device carries out fractional order circular convolution computing, obtains the output signal after anti-aliasing.
See Fig. 6, the formation method of described ultrasonic system composite signal, including:
S610, receives the echo-signal of ultrasound wave composite signal, and by described ultrasound wave coding composite signal
Echo-signal is converted to digital signal.
S620, carries out Beam synthesis by described digital signal, generates radiofrequency signal.
According to the bandwidth launching signal of the sample frequency and transmission that receive signal, S630, determines that described transmitting believes
Number the anglec of rotation factor of Fourier Transform of Fractional Order.
S640, calculates the system function of band filter.
In the present embodiment, band filter is according to program signal calculated, reaches the purpose of filtering.Pass through
Memorizer coding to digital filter, it is possible to realize various filter function.Digital filter is one
Input discrete-time signal (corresponding numerical frequency) (by predetermined algorithm, is converted to by individual discrete-time system
The specific function device of required output discrete-time signal).Need to require to turn technical specification according to design
It is changed to corresponding system function.Exemplary, can be calculated in the following way:
Bp_filter (i) point is multiplied by exp (-j*cot (aifa_rx (k)) * i^2* (Rx_fs/M) ^2), its
Middle k=(0,1 ... M-1), M is wave filter Bp_filter (i), and the result after being multiplied is-aifa_rx (i)
Fractional fourier transform, obtain the corresponding C (i) of wave filter；
S650, carries out fractional order circular convolution computing by the system function of described radiofrequency signal Yu band filter,
Obtain the output signal after anti-aliasing.
Exemplary, signal Sig and wave filter C (i) can be carried out the fractional order circumference on aifa_rx (i) rank
Convolution, it is thus achieved that output signal Sig_out (i).
The present embodiment, by by radiofrequency signal anti-aliasing, is specifically optimized for: to according to the sampling frequency receiving signal
The bandwidth launching signal of rate and transmission determines the anglec of rotation of the Fourier Transform of Fractional Order of described transmitting signal
The factor；Calculate the system function of band filter；System function by described radiofrequency signal Yu band filter
Carry out fractional order circular convolution computing, obtain the output signal after anti-aliasing.Utilize fractional order circular convolution fixed
Reason, carries out anti-aliasing process according to the convolution relation of the continuously linear FM signal signal to receiving, permissible
It is accurately obtained the signal of anti-aliasing.
Embodiment seven
Fig. 7 is the structural representation of the set composite of the ultrasonic system signal that the embodiment of the present invention seven provides, as
Shown in Fig. 7, described device includes:
Mid frequency screening module 710, in the bandwidth range of the probe of described ultrasonic system, screens
Mid frequency to each transmitting signal；
Coding module 720, for for each transmitting signal, obtains according to the mid frequency of described transmitting signal
Frequency band range described transmitting signal is encoded；
Mixing module 730, for mixing all transmitting signals, generates mixing and launches signal.
The set composite of the ultrasonic system signal that the present embodiment provides, by believing the transmitting of different emission bands
Number carry out different codings.The bandwidth of probe can be made full use of, and need not repeatedly launch, thus effectively
Solve the shortcoming of the DeGrain caused owing to emission band is narrow present in current techniques and repeatedly send out
Penetrate the defect that the temporal resolution caused declines.
On the basis of the various embodiments described above, described mid frequency screening module is used for:
The anglec of rotation of the energy optimal accumulated of fractional Fourier transform domain is determined according to modulation bandwidth；
Calculate the bandwidth model of described each transmitting signal according to the described anglec of rotation factor according to the described anglec of rotation
Enclose.
On the basis of the various embodiments described above, described coding module is used for:
Difference according to the bandwidth range between adjacent transmission signal Yu attenuation quotient chooses the center launching signal
Frequency, and the transmitting signal chosen is encoded.
On the basis of the various embodiments described above, described code device is used for:
Mid frequency according to described transmitting signal determines the waveform of described transmitting signal；
The waveform of described transmitting signal is carried out windowing process.
It is the most real that the set composite of the ultrasonic system signal that the embodiment of the present invention is provided can be used for performing the present invention
Execute the complex method of the high ultrasonic system signal that example provides, possess corresponding functional module, it is achieved identical has
Benefit effect.
Embodiment eight
Fig. 8 is the structural representation of the imaging device of the ultrasonic system composite signal that the embodiment of the present invention eight provides,
As shown in Figure 8, described device includes:
Modular converter 810, for receiving the echo-signal of ultrasound wave composite signal, and encodes described ultrasound wave
The echo-signal of composite signal is converted to digital signal；
Radiofrequency signal generation module 820, for described digital signal carries out Beam synthesis, generates radiofrequency signal；
Orthogonal signalling generation module 830, is used for described radiofrequency signal anti-aliasing and decoding process, and by just
Hand over modulation /demodulation, generate inphase quadrature signal；
Image-forming module 840, carries out imaging processing after carrying out the signal after inphase-quadrature modem being combined, raw
Become ultrasonography.
The imaging device of the ultrasonic system composite signal that the present embodiment provides, by believing the ultrasound wave received
Number carry out anti-aliasing and decoding process, the coding signal processing that will receive, generate inphase quadrature signal, can
To realize the imaging to composite signal, in uniform the one of the spatial resolution and general image improving ultrasonoscopy
While cause property, it is ensured that the temporal resolution of ultrasonoscopy.
On the basis of the various embodiments described above, described orthogonal signalling generation module is used for:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Described radiofrequency signal is carried out the Fourier Transform of Fractional Order of the described anglec of rotation factor；
The anglec of rotation factor according to described Fourier Transform of Fractional Order sets the cut-off of corresponding band filter
Frequency, and use the radiofrequency signal after Fourier Transform of Fractional Order described in the band-pass filter of described correspondence；
Filtered radiofrequency signal is carried out inverse Fourier Transform of Fractional Order.
On the basis of the various embodiments described above, described orthogonal signalling generation module is used for:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Calculate the system function of band filter；
The system function of described radiofrequency signal Yu band filter is carried out fractional order circular convolution computing, obtains
Output signal after anti-aliasing.
The imaging device of the ultrasonic system composite signal that the embodiment of the present invention is provided can be used for performing the present invention and appoints
The formation method of the ultrasonic system composite signal that meaning embodiment provides, possesses corresponding functional module, it is achieved phase
Same beneficial effect.
Obviously, it will be understood by those skilled in the art that each module or each operation of the above-mentioned present invention can be led to
Cross terminal unit as above to implement.Alternatively, the embodiment of the present invention can be able to perform with computer installation
Program realize, perform such that it is able to be stored in storing in device by processor, described journey
Sequence can be stored in a kind of computer-readable recording medium, and storage medium mentioned above can be read-only depositing
Reservoir, disk or CD etc.；Or they to be fabricated to respectively each integrated circuit modules, or by them
In multiple modules or operation be fabricated to single integrated circuit module and realize.So, the present invention is not restricted to
The combination of any specific hardware and software.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art
It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art
Row various obvious changes, readjust and substitute without departing from protection scope of the present invention.Therefore, though
So by above example, the present invention is described in further detail, but the present invention be not limited only to
Upper embodiment, without departing from the inventive concept, it is also possible to include other Equivalent embodiments more,
And the scope of the present invention is determined by scope of the appended claims.
Claims (14)
1. the complex method of a ultrasonic system signal, it is characterised in that described method includes:
In the bandwidth range of the probe of described ultrasonic system, screening obtains the mid frequency of each transmitting signal；
For each transmitting signal, the frequency band range obtained according to the mid frequency of described transmitting signal is to described
Launch signal to encode；
All transmitting signals are mixed, generates mixing and launch signal.
Method the most according to claim 1, it is characterised in that the described probe at described ultrasonic system
Bandwidth range in, screening obtains the mid frequency of each transmitting signal, including:
The anglec of rotation of the energy optimal accumulated of fractional Fourier transform domain is determined according to modulation bandwidth；
Calculate the bandwidth model of described each transmitting signal according to the described anglec of rotation factor according to the described anglec of rotation
Enclose.
Method the most according to claim 1, it is characterised in that described according in described transmitting signal
Described transmitting signal is encoded by the frequency band range that frequency of heart obtains, including:
Difference according to the bandwidth range between adjacent transmission signal Yu attenuation quotient chooses the center launching signal
Frequency, and the transmitting signal chosen is encoded.
Method the most according to claim 1, it is characterised in that described for each transmitting signal, root
According to the mid frequency of described transmitting signal, described transmitting signal is encoded, including:
Mid frequency according to described transmitting signal determines the waveform of described transmitting signal；
The waveform of described transmitting signal is carried out windowing process.
5. the formation method of a ultrasonic system composite signal, it is characterised in that described method includes:
Receive the echo-signal of ultrasound wave composite signal, and the echo-signal of described composite signal is converted to number
Word signal；
Described digital signal is carried out Beam synthesis, generates radiofrequency signal；
To described radiofrequency signal according to the modulation bandwidth anti-aliasing of sample frequency and each signal and decoding process,
And by inphase-quadrature modem, generate inphase quadrature signal；
Carry out imaging processing after carrying out the signal after inphase-quadrature modem being combined, generate ultrasonography.
Method the most according to claim 5, it is characterised in that described multiple according to sample frequency and composition
Close the modulation bandwidth anti-aliasing of each signal of signal, including:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Described radiofrequency signal is carried out the Fourier Transform of Fractional Order of the described anglec of rotation factor；
The anglec of rotation factor according to described Fourier Transform of Fractional Order sets the cut-off of corresponding band filter
Frequency, and use the radiofrequency signal after Fourier Transform of Fractional Order described in the band-pass filter of described correspondence；
Filtered radiofrequency signal is carried out inverse Fourier Transform of Fractional Order.
Method the most according to claim 5, it is characterised in that described multiple according to sample frequency and composition
Close the modulation bandwidth anti-aliasing of each signal of signal, including:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Calculate the system function of band filter；
The system function of described radiofrequency signal Yu band filter is carried out fractional order circular convolution computing, obtains
Output signal after anti-aliasing.
8. the set composite of a ultrasonic system signal, it is characterised in that described device includes:
Mid frequency screening module, in the bandwidth range of the probe of described ultrasonic system, screening obtains
The mid frequency of each transmitting signal；
Coding module, for for each transmitting signal, obtains according to the mid frequency of described transmitting signal
Described transmitting signal is encoded by frequency band range；
Mixing module, for mixing all transmitting signals, generates mixing and launches signal.
Device the most according to claim 8, it is characterised in that described mid frequency screening module is used for:
The anglec of rotation of the energy optimal accumulated of fractional Fourier transform domain is determined according to modulation bandwidth；
Calculate the bandwidth model of described each transmitting signal according to the described anglec of rotation factor according to the described anglec of rotation
Enclose.
Device the most according to claim 8, it is characterised in that described coding module is used for:
Difference according to the bandwidth range between adjacent transmission signal Yu attenuation quotient chooses the center launching signal
Frequency, and the transmitting signal chosen is encoded.
11. devices according to claim 8, it is characterised in that described code device is used for:
Mid frequency according to described transmitting signal determines the waveform of described transmitting signal；
The waveform of described transmitting signal is carried out windowing process.
The imaging device of 12. 1 kinds of ultrasonic system composite signals, it is characterised in that described device includes:
Modular converter, receives the echo-signal of ultrasound wave composite signal, and by compound for described ultrasound wave coding letter
Number echo-signal be converted to digital signal；
Radiofrequency signal generation module, for described digital signal carries out Beam synthesis, generates radiofrequency signal；
Orthogonal signalling generation module, for according to sample frequency and forming composite signal to described radiofrequency signal
The modulation bandwidth anti-aliasing of each signal and decoding process, and by inphase-quadrature modem, generate inphase quadrature
Signal；
Image-forming module, carries out imaging processing after carrying out the signal after inphase-quadrature modem being combined, generates
Ultrasonography.
13. devices according to claim 12, it is characterised in that described orthogonal signalling generation module is used
In:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Described radiofrequency signal is carried out the Fourier Transform of Fractional Order of the described anglec of rotation factor；
The anglec of rotation factor according to described Fourier Transform of Fractional Order sets the cut-off of corresponding band filter
Frequency, and use the radiofrequency signal after Fourier Transform of Fractional Order described in the band-pass filter of described correspondence；
Filtered radiofrequency signal is carried out inverse Fourier Transform of Fractional Order.
14. devices according to claim 12, it is characterised in that described orthogonal signalling generation module is used
In:
The bandwidth launching signal according to the sample frequency and transmission that receive signal determines dividing of described transmitting signal
The anglec of rotation factor of number rank Fourier transformation；
Calculate the system function of band filter；
The system function of described radiofrequency signal Yu band filter is carried out fractional order circular convolution computing, obtains
Output signal after anti-aliasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407721.3A CN105997142A (en) | 2016-06-12 | 2016-06-12 | Ultrasonic system transmitting signal compositing and imaging method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407721.3A CN105997142A (en) | 2016-06-12 | 2016-06-12 | Ultrasonic system transmitting signal compositing and imaging method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105997142A true CN105997142A (en) | 2016-10-12 |
Family
ID=57090176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610407721.3A Pending CN105997142A (en) | 2016-06-12 | 2016-06-12 | Ultrasonic system transmitting signal compositing and imaging method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105997142A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693253A (en) * | 2018-05-02 | 2018-10-23 | 南昌航空大学 | A kind of rapid phase-control battle array ultrasound total focus imaging technique |
| CN109199448A (en) * | 2018-09-04 | 2019-01-15 | 深圳市理邦精密仪器股份有限公司 | Pulsed-Wave Doppler imaging method and device based on HPRF |
| CN109828029A (en) * | 2019-03-28 | 2019-05-31 | 深圳中凯剑无损检测设备科技有限公司 | A kind of ultrasonic phase array detection system and method based on initial data |
| CN110013270A (en) * | 2019-04-24 | 2019-07-16 | 飞依诺科技(苏州)有限公司 | The transmitting of ultrasonic imaging broadband signal and processing and its corresponding system |
| CN110742581A (en) * | 2019-10-08 | 2020-02-04 | 北京邮电大学 | BCG signal processing method and device |
| WO2021037252A1 (en) * | 2019-08-28 | 2021-03-04 | 华南理工大学 | Fractional fourier transform echo imaging method and system based on probe compensation |
| CN113687363A (en) * | 2021-10-27 | 2021-11-23 | 广东奥迪威传感科技股份有限公司 | Ultrasonic aftershock prevention distance detection method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030028098A1 (en) * | 2001-07-31 | 2003-02-06 | Brock-Fisher George A. | Apparatus and method of frequency compounding to perform contrast imaging |
| US20090112090A1 (en) * | 2007-10-25 | 2009-04-30 | Hitachi Medical Corporation | Ultrasonic imaging apparatus |
| CN102027386A (en) * | 2008-01-09 | 2011-04-20 | 海浪科技有限公司 | Nonlinear elastic imaging with two-frequency elastic pulse complexes |
| CN103079475A (en) * | 2010-07-07 | 2013-05-01 | 西江大学校产学协力团 | Method for generating ultrasonic image using concave array |
| US20130137986A1 (en) * | 2011-11-30 | 2013-05-30 | Yoshihiro Takeda | Ultrasound diagnostic imaging apparatus |
| CN103126723A (en) * | 2013-03-19 | 2013-06-05 | 飞依诺科技(苏州)有限公司 | Multi-beam frequency compound imaging method and system thereof |
-
2016
- 2016-06-12 CN CN201610407721.3A patent/CN105997142A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030028098A1 (en) * | 2001-07-31 | 2003-02-06 | Brock-Fisher George A. | Apparatus and method of frequency compounding to perform contrast imaging |
| US20090112090A1 (en) * | 2007-10-25 | 2009-04-30 | Hitachi Medical Corporation | Ultrasonic imaging apparatus |
| CN102027386A (en) * | 2008-01-09 | 2011-04-20 | 海浪科技有限公司 | Nonlinear elastic imaging with two-frequency elastic pulse complexes |
| CN103079475A (en) * | 2010-07-07 | 2013-05-01 | 西江大学校产学协力团 | Method for generating ultrasonic image using concave array |
| US20130137986A1 (en) * | 2011-11-30 | 2013-05-30 | Yoshihiro Takeda | Ultrasound diagnostic imaging apparatus |
| CN103126723A (en) * | 2013-03-19 | 2013-06-05 | 飞依诺科技(苏州)有限公司 | Multi-beam frequency compound imaging method and system thereof |
Non-Patent Citations (7)
| Title |
|---|
| FRANCOIS VARRAY 等: "a multi-frequency approach to increase the native resolution of ultrasound images", 《20TH EUROPEAN SIGNAL PROCESSING CONFERENCE》 * |
| JOSHUA S. ULLOM 等: "Ultrasound Speckle Reduction using Coded Excitation，Frequency Compounding，and Postprocessing Despeckling Filters", 《IEEE INTERNATIONAL ULTRASONIC SYMPOSIUM PROCEEDINGS》 * |
| ZHANG ZHI-HONG 等: "optimization of ultrasonic elastography by coded excitation and transmit-side multi-frequency compounding", 《JOURNAL OF CENTRAL SOUTH UNIVERSITY》 * |
| 刘宝华 等: "多分量LFM信号在分数阶Fourier域的参数估计与分离", 《中国科技论文》 * |
| 彭辉 等: "Chirp编码激励在超声弹性成像***中的应用研究", 《中国生物医学工程学报》 * |
| 李进: "分数阶 Fourier 变换在超声信号处理中的应用", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 肇启明 等: "多进制chirp-rate 键控调制及分数傅里叶变换法解调", 《通信学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693253A (en) * | 2018-05-02 | 2018-10-23 | 南昌航空大学 | A kind of rapid phase-control battle array ultrasound total focus imaging technique |
| CN109199448A (en) * | 2018-09-04 | 2019-01-15 | 深圳市理邦精密仪器股份有限公司 | Pulsed-Wave Doppler imaging method and device based on HPRF |
| CN109199448B (en) * | 2018-09-04 | 2021-08-27 | 深圳市理邦精密仪器股份有限公司 | Pulse wave Doppler imaging method and device based on HPRF |
| CN109828029A (en) * | 2019-03-28 | 2019-05-31 | 深圳中凯剑无损检测设备科技有限公司 | A kind of ultrasonic phase array detection system and method based on initial data |
| CN109828029B (en) * | 2019-03-28 | 2021-08-27 | 烟台中凯检测科技有限公司 | Ultrasonic phased array detection system and method based on original data |
| CN110013270A (en) * | 2019-04-24 | 2019-07-16 | 飞依诺科技(苏州)有限公司 | The transmitting of ultrasonic imaging broadband signal and processing and its corresponding system |
| WO2021037252A1 (en) * | 2019-08-28 | 2021-03-04 | 华南理工大学 | Fractional fourier transform echo imaging method and system based on probe compensation |
| CN110742581A (en) * | 2019-10-08 | 2020-02-04 | 北京邮电大学 | BCG signal processing method and device |
| CN110742581B (en) * | 2019-10-08 | 2020-11-06 | 北京邮电大学 | BCG signal processing method and device |
| CN113687363A (en) * | 2021-10-27 | 2021-11-23 | 广东奥迪威传感科技股份有限公司 | Ultrasonic aftershock prevention distance detection method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105997142A (en) | Ultrasonic system transmitting signal compositing and imaging method and device | |
| Misaridis et al. | Use of modulated excitation signals in medical ultrasound. Part II: Design and performance for medical imaging applications | |
| US5016641A (en) | Spectral interpolation of ultrasound Doppler signal | |
| Taxt | Comparison of cepstrum-based methods for radial blind deconvolution of ultrasound images | |
| US11638573B2 (en) | Pulse offset ultrasonic imaging | |
| JP2004512857A (en) | Medical diagnostic ultrasound system using contrast pulse sequence imaging | |
| JP3665612B2 (en) | Ultrasonic diagnostic equipment | |
| KR20070014957A (en) | Medical diagnostic ultrasound transducer system for harmonics | |
| CN107817297A (en) | A kind of ultrasonic imaging processing method and processing system based on ultrasonic echo RF data | |
| CN106210719A (en) | Channel data based on Ultrasound beamforming device compresses | |
| US4413520A (en) | Ultrasonic imaging apparatus | |
| JPH10293171A (en) | Ultrasonic beam forming device | |
| JPH07327999A (en) | Detection strength space filter in ultrasonic wave imaging device | |
| WO2005058167A2 (en) | Ultrasonographic device | |
| US12004908B2 (en) | Ultrasound imaging system for high resolution wideband harmonic imaging | |
| CN105919624B (en) | A kind of high impulse repeats the coding and device of scanning frequency signal | |
| CN105406836B (en) | A kind of down-sampled demodulation filtering method | |
| JP4698003B2 (en) | Ultrasonic diagnostic equipment | |
| US5501222A (en) | System for imaging a region | |
| Gran et al. | Coded ultrasound for blood flow estimation using subband processing | |
| JP2005152675A (en) | Ultrasonic diagnostic equipment | |
| US5827189A (en) | Method and apparatus for preventing axial spatial aliasing in ultrasound imager having complex signal detector | |
| CN102247167A (en) | B-mode ultrasonic scanner with wireless probe and realization method thereof | |
| CN101361663B (en) | Ultrasonic image pickup equipment | |
| CN104224232A (en) | Ultrasonic harmonic imaging method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
|
| RJ01 | Rejection of invention patent application after publication |