CN102908167B - The cloud imaging processing system of medical ultrasonic equipment and method thereof - Google Patents

Abstract

The invention discloses a kind of cloud imaging processing system and the method thereof of medical ultrasonic equipment, belong to ultrasonic imaging technique field.The ultrasound transducer array that the transmitting terminal of this cloud imaging processing system is repeatedly launched on pulse signal incentive probe sends ultrasonic signal, receiving terminal receives echo-signal and delivers to cloud processing unit and carry out cloud process, and is sent by the signal after cloud processes to display unit display ultrasonoscopy.The present invention, it is possible to by repeatedly launching the multi-stage synthesis of each impact point that ultrasound wave is implemented as in image space, is possible not only to obtain higher signal to noise ratio, and largely suppression speckle noise and other noise jamming, thus improves image quality.

Description

The cloud imaging processing system of medical ultrasonic equipment and method thereof

Technical field

The present invention relates to medical ultrasound image and diagnostic techniques, particularly relate to cloud imaging processing system and the method thereof of medical ultrasonic equipment.

Background technology

At present, along with constantly popularizing of ultrasonic medical equipment, the requirement to equipment precision is more and more higher, if more true and useful Ultrasonic diagnostic information can be provided physicians with, can diagnose conditions of patients more easily.Human body soft tissue pathological changes and normal structure only have little difference, if do not arrived by scanning when imaging, pathological tissues is probably left in the basket, and the most how to be provided that more more useful information and ensure to show that image is the major issue of current research in real time.Traditional ultrasonic imaging technique transmitting focusing wave beam, and be received Beam synthesis along transmitting focusing so that the scope of covering is little and easy drain message.

Summary of the invention

In view of this, present invention is primarily targeted at a kind of cloud imaging processing system and the method thereof that medical ultrasonic equipment is provided, to obtain higher signal to noise ratio and to promote the image quality of diasonograph.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

The cloud imaging processing system of a kind of medical ultrasonic equipment, including probe, launches/receives switch and display unit；Also include transmitting terminal, receiving terminal and cloud processing unit；Described transmitting terminal launches the ultrasound transducer array on pulse signal incentive probe in imaging space continuous several times, to send ultrasonic signal, described ultrasonic signal covers each impact point of described imaging space, described receiving terminal receives the echo-signal of described each impact point, and it is obtained through repeatedly launching the reception synthesis of overlapped part by the information of each impact point in imaging space；Then described echo-signal is delivered to described cloud processing unit and carries out cloud process, finally the signal after described cloud processing unit processes is sent to described display unit display ultrasonoscopy.

Wherein: described transmitting terminal multiple positions in imaging space are launched ultrasound wave and formed transmitting sequential focusing.

Echo-signal described in the reception of described cloud processing unit, and described echo-signal is carried out signal processing, to adapt to the display needs of display unit.

A kind of cloud image processing method of medical ultrasonic equipment, the method includes:

A, startup transmitting terminal, at imaging space continuous several times transmitting pulse signal to produce ultrasonic signal, make ultrasonic signal obtain maximal cover region, to cover each impact point of described imaging space；

B, making receiving terminal receive the echo-signal of described each impact point, it is received synthesis by information of each impact point in imaging space obtain through repeatedly launching overlapped part；

C, described echo-signal is delivered to described cloud processing unit carry out cloud process, finally the signal after described cloud processing unit processes is sent to described display unit and show ultrasonoscopy.

Wherein: the ultrasonic signal described in step A is Gaussian weighting function.

Echo-signal described in step B is by obtaining after the array element weighted coefficients weighting in probe transducers transmitting aperture time delay superposition；Signal r (t) that receiving terminal receives is:

$r\left(t\right)=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Apo}}_{j}w\left(j\right)\sin (\mathrm{wt}-{\mathrm{\θ}}_j);$

Wherein: N is receiving aperture size, Apo_jFor the reception weight coefficient of jth array element, θ in receiving aperture_jFor transmitter, phase deflection angle.

The signal that imaging space impact point described in step C receives is:

$r^{\′}\left(t\right)=\underset{i=1}{\overset{M}{\mathrm{\Σ}}}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Apo}}_i{\mathrm{Apo}}_{j}w\left(j\right)\sin (\mathrm{wt}-{\mathrm{\θ}}_j-{\mathrm{\ρ}}_i);$

Wherein: M is the number of times that imaging space midpoint is overlapping, and N is receiving aperture size, ρ_iFor transmitter, phase deflection angle, θ_jFor receiving phase deflection angle.

The cloud imaging processing system of medical ultrasonic equipment provided by the present invention and method thereof, have the advantage that

The cloud imaging processing system of this diasonograph can utilize the powerful calculating ability that cloud processes, obtained by repeatedly launching the reception synthesis of overlapped part by the every dot information in imaging space, to obtain higher signal to noise ratio, and largely suppression speckle noise and other noise jamming, thus improve image quality.

Accompanying drawing explanation

Fig. 1 is existing typical ultrasonic image-forming system structural representation；

Fig. 2 is the cloud imaging processing system structural representation of the medical ultrasonic equipment of the present invention；

Fig. 3 a is that existing ultrasonic image-forming system launches overlay area schematic diagram；

Fig. 3 b is that existing ultrasonic image-forming system receives overlay area schematic diagram；

Fig. 4 a is the repeatedly transmitting overlay area schematic diagram of the cloud imaging processing system of the present invention；

Fig. 4 b is the repeatedly reception overlay area schematic diagram of the cloud imaging processing system of the present invention；

Fig. 5 is the multi-stage synthesis effect schematic diagram of diasonograph scanning space impact point of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawings and cloud imaging processing system and the method thereof of the present invention are described in further detail by embodiments of the invention.

Fig. 1 is existing typical ultrasonic image-forming system structural representation, as shown in Figure 1, this system includes the probe being made up of ultrasonic transducer, launches/receive switch, transmitting terminal, receiving terminal, beam synthesizer, signal processing unit, scan conversion unit and display device.Wherein, transmitting terminal is launched the ultrasound transducer array on pulse signal incentive probe and is sent ultrasonic signal, and receiving terminal receives echo-signal and delivers to signal processing unit and carry out signal processing, shows ultrasonoscopy after scanned conversion.

Transmitting focusing wave beam in the typical ultrasonic image-forming system of conventional art, is received Beam synthesis along transmitting focusing so that the scope of covering is little and easy drain message.

For overcoming the shortcoming of above-mentioned prior art, the present invention now proposes the cloud imaging processing system of a kind of medical ultrasonic equipment.

Fig. 2 is the cloud imaging processing system structural representation of the medical ultrasonic equipment of the present invention, as in figure 2 it is shown, it mainly includes pop one's head in 201, transmitting/reception switch 202, transmitting terminal 203, receiving terminal 204, cloud processing unit 205 and display unit 206；Wherein:

Transmitting terminal 203 continuous several times launches the ultrasound transducer array on pulse signal incentive probe 201, to send ultrasonic signal, receiving terminal 204 receives echo-signal and delivers to cloud processing unit 205 and carry out cloud process, then the signal after cloud processing unit 205 processes is sent to display unit 206, this display unit 206 directly displays out.

Fig. 3 a and Fig. 3 b is respectively the transmitting of existing conventional ultrasound imaging system, receives overlay area schematic diagram, wherein region 301 is to launch the impact point in overlay area, under legacy transmission pattern, this dot information is received end signal and processes and after scan conversion, receiving terminal no matter takes single line to receive or 2 lines, 4 lines receptions, easily cause loss of learning owing to focusing on discontinuous, thus information can be caused to omit.

Fig. 4 a and Fig. 4 b is respectively the repeatedly transmitting of the cloud imaging processing system of the present invention and repeatedly receives overlay area schematic diagram, as shown in the figure, it is not difficult to find out compared with existing emission mode (with reference to shown in Fig. 3 a) when it is launched, it is substantially big than existing traditional overlay area that it launches overlay area, and the embodiment of the present invention can make same impact point 401 by the first emitting area 402 through repeatedly transmitting, second emitting area 403, 3rd emitting area 404, 4th emitting area 405, 5th emitting area 406 or more emitting area are covered, overlapped part is there is in these emitting areas in imaging space, and launched by diverse location and obtain.Can be seen that compared with conventional receiver pattern (with reference to Fig. 3 b) when it receives, it is also bigger than existing traditional reception overlay area that it receives overlay area, and each impact point in space can be covered, the impact point i.e. spatial point 401 covered when launching remains to receive the information of this impact point when receiving, and it is the synthesis of multiple ultrasound wave overlay area.

Fig. 5 is the multi-stage synthesis effect schematic diagram of diasonograph scanning space impact point of the present invention, as it is shown in figure 5, the signal at its imaging space point 401 can be obtained by formula (7) by multiple different emitting areas, defines the sequential focusing along collectiong focusing.

Assuming that ultrasonic image-forming system transmitting terminal launches ultrasound wave is s₀T ()=sin (wt), for reducing sidelobe level, general employing Gaussian weighting function, such as hanning function, hamming function or blackman function.

Hanning window: $w\left(n\right)=0.5(1-\cos \left(2\mathrm{\π}\frac{n}{N-1}\right))$ N=0 ..., N-1(1)

Hamming window: $w\left(n\right)=0.54-0.46\cos \left(2\mathrm{\π}\frac{n}{N-1}\right)$ N=0 ..., N-1(2)

Blackman window: $w\left(n\right)=0.42-0.5\cos \left(2\mathrm{\π}\frac{n}{N-1}\right)+0.08\cos \left(4\mathrm{\π}\frac{n}{N-1}\right)$ N=0 ..., N-1(3)

The echo-signal obtained after array element weighted coefficients weighting also time delay superposition in probe transducers transmitting aperture is:

$s\left(t\right)=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}w\left(j\right)\sin \left(w(t-{\mathrm{\τ}}_j)\right)---\left(4\right)$

Make θ=w τ, then formula (4) can be write as:

$s\left(t\right)=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}w\left(j\right)\sin (\mathrm{wt}-{\mathrm{\θ}}_j)---\left(5\right)$

The signal that receiving terminal receives is:

$r\left(t\right)=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Apo}}_{j}w\left(j\right)\sin (\mathrm{wt}-{\mathrm{\θ}}_j)---\left(6\right)$

Wherein: N is receiving aperture, Apo_jFor the reception weight coefficient of jth array element, θ in receiving aperture_jFor transmitter, phase deflection angle.

The present invention uses and repeatedly launches reception, obtains the signal that imaging space impact point receives and is:

$r^{\′}\left(t\right)=\underset{i=1}{\overset{M}{\mathrm{\Σ}}}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Apo}}_i{\mathrm{Apo}}_{j}w\left(j\right)\sin (\mathrm{wt}-{\mathrm{\θ}}_j-{\mathrm{\ρ}}_i)---\left(7\right)$

Wherein: M is the number of times that imaging space midpoint is overlapping, and N is receiving aperture size, ρ_iFor transmitter, phase deflection angle, θ_jFor receiving phase deflection angle.

So, just can effectively be covered the institute in imaging space by conservative control emitting times of the present invention a little, thus define the sequential focusing of transmitting/reception.

The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.

Claims (1)

1. the cloud image processing method of a medical ultrasonic equipment, it is characterised in that the method includes:

A, start transmitting terminal, imaging space multiple position continuous several times launch pulse signal with produce ultrasonic signal formed launch assemble continuously so as to get ultrasonic signal repeatedly and cover each impact point of described imaging space；Described ultrasonic signal is Gaussian weighting function；

B, making receiving terminal receive the echo-signal of each impact point of described imaging space, it is received synthesis by information of each impact point in imaging space obtain through repeatedly launching overlapped part；Described echo-signal is by obtaining after the array element weighted coefficients weighting in probe transducers transmitting aperture time delay superposition；Signal r (t) that receiving terminal receives is:

$r\left(t\right)=\underset{j=1}{\overset{N}{\Σ}}{\mathrm{Apo}}_{j}w\left(j\right)sin(wt-{\mathrm{\θ}}_j);$

Wherein: N is receiving aperture size, Apo_jFor the reception weight coefficient of jth array element, θ in receiving aperture_jFor transmitter, phase deflection angle；

C, described echo-signal is delivered to cloud processing unit carry out cloud process, the information making each impact point in imaging space obtains via the echo-signal synthesis repeatedly launched/receive, and is sent by the signal after described cloud processing unit processes to display unit display ultrasonoscopy；The signal that described imaging space impact point receives is:

$r^{\′}\left(t\right)=\underset{i=1}{\overset{M}{\Σ}}\underset{j=1}{\overset{N}{\Σ}}{\mathrm{Apo}}_i{\mathrm{Apo}}_{j}w\left(j\right)sin(wt-{\mathrm{\θ}}_j-{\mathrm{\ρ}}_i);$

Wherein: M is the number of times that imaging space midpoint is overlapping, and N is receiving aperture size, ρ_iFor transmitter, phase deflection angle, θ_jFor receiving phase deflection angle.