CN104614728A - Device and method for ultrasonically imaging - Google Patents
Device and method for ultrasonically imaging Download PDFInfo
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- CN104614728A CN104614728A CN201510080856.9A CN201510080856A CN104614728A CN 104614728 A CN104614728 A CN 104614728A CN 201510080856 A CN201510080856 A CN 201510080856A CN 104614728 A CN104614728 A CN 104614728A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/8909—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration
- G01S15/8911—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a single transducer for transmission and reception
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/8909—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration
- G01S15/8915—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/8965—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using acousto-optical or acousto-electronic conversion techniques
- G01S15/8975—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using acousto-optical or acousto-electronic conversion techniques using acoustical image/electron beam converter tubes
Abstract
The invention provides device and method for ultrasonically imaging. Compared with the traditional ultrasonic imaging device, the device has the advantages that at least one array element can be used for emitting and receiving each time, so that the cost of emitting and receiving circuits can be greatly reduced, and the power consumption of the emitting and receiving circuits due to the decrease of the channel quantity can also be highly reduced; in addition, the signal processing such as emission multi-channel delay control, synchronizing of receiving multi-channel beams, and dynamic filter in a scanning imaging module can be saved; control and signal processing circuits are extremely simple, and therefore, the requirements of FPGA or DSP for performing the control and signal processing are greatly reduced, and as a result, the circuit power consumption and cost can be further decreased.
Description
Technical field
The present invention relates to and a kind ofly only can realize low-power consumption, the supersonic imaging device of low cost and formation method thereof for the transmitting and receiving of single array element with minimum.
Background technology
Conventional ultrasound image-forming step is the transmitting focusing delay parameter arranging different array element when at every turn scanning according to the position of the transmitting focus of setting, hyperchannel launches overrun control produces different delayed time transmitted waveform according to these delay parameters, because this control device exports as low-voltage signal, low-voltage signal produces high pressure transmitted waveform again after high drive, after the high pressure transmitted waveform of these different delayed time has encouraged the array element on probe, array element produces ultrasonic signal, the transmitting focal position that the ultrasonic signal of different delayed time sets in ultrasonic imaging medium focuses on, obtain the transmitting sound field that energy is very concentrated.Ultrasound wave produces scatter echo or reflection echo when propagating and run into scattering or reflectance target in medium (so-called medium can be tissue in medical ultrasound image or industrial nondestructive testing in concrete or bloom etc.).Device utilizes at least 16 array elements near launching beam to receive scattering and reflection echo.In order to avoid the high-voltage signal for launching destroys receiving circuit, need the isolation that transmits of high pressure before receiving circuit.Because the echo received is very weak, carry out analog to digital conversion (ADC) after the analog signal processing such as needs amplify the feeble signal received, filtering, the digital signal of acquisition inputs the high-speed digital signal processing apparatus such as FPGA or DSP again and carries out received beam synthesis.The time delay of different probe array element is arrived according to the position calculation echo of received scanline, namely received beam synthesis is achieved to the echoed signal of described array element is superimposed after different delay process, dynamic aperture technology can be adopted when received beam synthesizes, thus obtain signal to noise ratio (S/N ratio), preferably image spatial resolution, the less near field noise jamming of the rear signal of synthesis preferably.So-called dynamic aperture technology is exactly use the echo of less array element to synthesize in more shallow position, is using more array element echo synthesis compared with deep location.Signal after Beam synthesis uploads to after host module does further post processing of image and shows the process such as digital scan transformation (DSC) and outputs to display display after the digital signal processing such as dynamic filter, envelope (amplitude) detection, log-compressed.
In order to the spatial resolution obtained, need large imaging aperture, namely need the array number more much bigger than 16 simultaneously for transmitting and receiving, in existing product, the general physical channel number adopted is at least 64 passages, namely can have maximum 64 array elements for transmitting and receiving simultaneously.So many port number transmits and receives simultaneously, and corresponding hardware cost is very high, and in order to support so much port number, the complexity of corresponding control and received beam synthesis is also very high.Nonetheless, different depth dynamic focusing cannot be realized owing to launching, therefore (namely each imaging arranges the different transmitting depths of focus to adopt multi-focal point mosaic technology, then repeatedly imaging signal is used further to last imaging processing after splicing) although the homogeneity of the whole audience resolution of different depth can be improved to a certain extent, greatly sacrifice the frame per second of imaging.In addition, the power consumption that the parallel a large amount of array element of each scanning participates in transmitting and hyperchannel device causes the power consumption of conventional ultrasound all very large (large can reach hundreds of watts).
Disclose in CN 102697524 and only launch spherical wave by 1 ~ 4 array element and synthesize multiple wave beam with multiple reception array element parallel beam, the formation method that the received beam that adjacent transmission scans is added again.Although the method greatly reduces emissive power, and be added by the received beam that adjacent transmission scans the dynamic focusing achieving transmitting.But the method still requires that system has more receiving cable for the synthesis of parallel received beam, and the parallel beam synthesis requiring larger amt calculates in real time, therefore the hardware complexity of receiving cable and cost even also high than conventional ultrasound imaging, cause system complexity and power consumption still to remain high.
Summary of the invention
For the weak point mentioned in the problems referred to above, the invention provides a kind of supersonic imaging device and formation method, to achieve these goals, the present invention is realized by following technical scheme.
A kind of supersonic imaging device, comprise probe mechanism, image scanning mechanism and main unit mechanism, described probe mechanism, image scanning mechanism and main unit mechanism are electrically connected successively,
Described probe mechanism comprises probe, is provided with multiple array element in described probe;
Described image scanning mechanism comprises high-voltage driving device, analog signal processing device, analog-to-digital conversion device and control/DIU data interface unit, wherein,
Described high-voltage driving device is used for the emission control parameter signal that Receiving Host mechanism transmits, described emissioning controling signal can comprise transmitted waveform and transponder pulse repetition period, the high-voltage signal that described transmitted waveform signal generates after high drive sends described probe mechanism to
Described analog signal processing device is used for that the described ultrasonic echo signal received is carried out high pressure successively and launches isolation, amplify, filtering process, and send the echoed signal after process to analog-to-digital conversion device, in described analog signal processing device, be provided with a high pressure launch buffer circuit, the effect of this high_voltage isolation circuit is the voltage of the ultrasonic echo signal of input may be tens volts, but exporting to control below 1 volt, thus play the effect of protection receipt of subsequent circuit, described analog-to-digital conversion device is used for converting the echoed signal after described process to digital signal, and by described digital data transmission to control/DIU data interface unit,
Described control/DIU data interface unit is used for the described digital signal that buffer memory receives, and upload to main unit mechanism through data-interface, the controling parameters signal of described image scanning mechanism is also sent to for receiving described main unit mechanism, described controling parameters signal at least comprises emission control parameter signal, and sends described emission control parameter signal to described high-voltage driving device;
Described main unit mechanism comprises control device and digital signal processing device, wherein,
Described parameter for generation of the parameter needed for image scanning mechanism, and is sent to described image scanning mechanism by described control/DIU data interface unit by described control device.
Described digital signal processing device is electrically connected with described control/DIU data interface unit, comprise the first processing section and the second processing section, described first processing section is used for carrying out Beam synthesis to the digital signal of the echo of described not homogeneous scanning, described second processing section is used for carrying out process to the signal that Beam synthesis exports and generates ultrasonoscopy, and generation ultrasonoscopy is uploaded to output display on display.
Described first processing section in described digital signal processing device is arranged in described imaging scanner, and the output signal of Beam synthesis uploads to by control/DIU data interface unit the process that described main unit mechanism carries out described second processing section again.
A ultrasonic imaging method for supersonic imaging device, comprises the following steps:
Step 1, pre-sets the controling parameters of imaging scanning mechanism, and described emission control parameter signal obtains high-voltage signal after high-voltage driving device process, and described high-voltage signal is sent to probe mechanism;
Step 2, under the effect of described high-voltage signal, probe starts to carry out transmitting and receiving signal, and the ultrasonic echo signal of reception is transferred to described image scanning mechanism;
Step 3, carries out analog signal processing to described ultrasonic echo signal, analog-to-digital conversion obtains digital signal, carry out buffer memory and upload main unit mechanism to described digital signal;
Step 4, carries out Beam synthesis process to the described digital signal uploaded and obtains Beam synthesis signal, carries out further digital signal processing and obtains ultrasonoscopy, and be uploaded to display to described Beam synthesis signal.
Step 1 specifically comprises the steps:
Step 1.1, in control device in the image-forming condition input main unit mechanism that user is set, the controling parameters of image scanning mechanism is obtained by the image-forming condition calculating or read user's setting, controling parameters is transmitted waveform control signal, pulse repetition time signal, the controling parameters signal of described image scanning mechanism is sent to described image scanning mechanism with the voltage signal form of low pressure by control/DIU data interface unit
Step 1.2, the controling parameters signal of reception is converted to the high-voltage signal for launching by the high-voltage driving device in described image scanning mechanism, and described high-voltage signal is sent to the probe in probe mechanism.
In step 2, produce ultrasound wave after the high-voltage signal excitation that during each scanning, in probe, at least one array element is received and be transmitted in medium,
Described ultrasound wave enters the ultrasonic echo producing scattering or reflection after medium encounters target, and during each scanning, at least one array element is for receiving described ultrasonic echo, and described ultrasonic echo signal is transferred to described image scanning mechanism.
Step 3 specifically comprises the steps:
Step 3.1, the described ultrasonic echo signal received is carried out high pressure and is launched isolation, amplification, filtering process by analog signal processing device successively, and sends the echoed signal after process to analog-to-digital conversion device,
Step 3.2, described analog-to-digital conversion device converts the echoed signal after described process to digital signal, and by described digital data transmission to control/DIU data interface unit,
Step 3.3, the described digital signal that described control/DIU data interface unit buffer memory receives, and upload to described main unit mechanism through data-interface.
Step 4 specifically comprises the steps:
Step 4.1, the digital signal of delay parameter to the echo of the not homogeneous scanning that described control/DIU data interface unit is uploaded that digital signal processing device is determined according to the locus of launching array element, reception array element and received scanline carries out time delay superposition, thus realize the Beam synthesis of transmitting and receiving simultaneously, form Beam synthesis signal
Step 4.2, carries out dynamic filter, envelope detection, log-compressed, display numeral scan transformation processing procedure acquisition ultrasonoscopy to described Beam synthesis signal, is outputted on display by described ultrasonoscopy and show.
In step 4.1, in advance according to launching array element, receive the locus of array element and received scanline and calculate the parameter of Beam synthesis and be stored in described control device (8), superposition synthesis after the echo of parameter to not homogeneous scanning directly searching described storage when Beam synthesis process carries out different time delays.
In step 4.2, described Beam synthesis processing procedure also comprises a dynamic aperture processing procedure.
Described probe scan the array element for launching at every turn and the element position for receiving identical or different.
Beneficial effect of the present invention is:
1, this system is compared with conventional ultrasound imaging system, each scanning for the array element that transmits and receives minimum can be one, thus enormously simplify the complexity (cost) of transmitting and receiving circuit, and the power consumption that port number reduces the transmitting and receiving circuit brought also sharply reduces; In addition, launch hyperchannel delays time to control owing to eliminating in scanning imagery module, receive the signal transacting such as hyperchannel Beam synthesis, dynamic filter, it is simple that this control and signal processing circuit also become extremely, thus greatly reduce the requirement of FPGA or DSP performing these controls and signal transacting, reduce further power consumption and the cost of circuit.
2, the echo of not homogeneous scanning uploads to Beam synthesis and the signal transacting that host module carries out off-line, namely often scan a line traditional imaging systems namely need to carry out a Beam synthesis in real time without the need to resembling, can realize after whole frame scan completes in new imaging system, all batch is disposable completes Beam synthesis by all received scanlines for off-line.Existing CPU, GPU or ARM+GPU framework calculated performance can bear the computing of corresponding batch Beam synthesis completely, and popularizing along with intelligent and portable equipment, and cost and the power consumption of these computing chips are all become better and better with controlling.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of supersonic imaging device of the present invention;
Fig. 2 is the structured flowchart of conventional ultrasound imaging device;
Fig. 3 is the process flow diagram of a kind of ultrasonic imaging method of the present invention;
Fig. 4 is the embodiment schematic diagram of a kind of supersonic imaging device of the present invention;
Fig. 5 is the embodiment image of a kind of supersonic imaging device of the present invention.
Description of reference numerals:
1, probe mechanism; 2, image scanning mechanism; 3, main unit mechanism; 4, pop one's head in; 5, analog signal processing device; 6, analog-to-digital conversion device; 7, control/DIU data interface unit; 8, control device; 9, digital signal processing device; 10, high-voltage driving device.
Embodiment
Below in conjunction with accompanying drawing 1-5 and embodiment, the embodiment that the present invention carries out is described in further detail.
Be received as example describe described ultrasonic imaging method in detail with single array element transmitting, single array element.Fig. 4 gives the schematic diagram that comprises the scanning probe of 15 array elements, and owing to being single array element for launching, the wave beam therefore launched is very wide, and the beam angle that each array element is launched is as shown in the scope in figure between two lines.Sweep limit is assumed to be 0 ~ No. 14 array element, after then starting scanning, No. 0 energized ultrasound wave of launching of array element enters medium, echo is produced after encountering scattering and reflectance target in media as well, echo is received by No. 0 array element, after the echo that imageable target is the darkest is also received, complete the scanning of No. 0 array element, systematic evaluation repeats the scanning process of described transmitting and receiving to No. 1 array element, until the transmitting of No. 14 array elements, receive scanning process complete after namely complete the complete image scanning of a frame.Come back to the image scanning that No. 0 array element starts a new frame.The order of described scanning can be from No. 0 array element scanning one by one of advancing successively; Also can replace with and start a frame scan from No. 14 array elements, fall back array element scanning successively one by one; Can also be the out of order scanning of array element, as long as ensure that each array element is at least scanned once within the scan period of a frame.
After the echo of the scanning of each array element of acquisition one frame, Beam synthesis can be carried out according to the position of the received scanline arranged and direction.The density of received scanline can set arbitrarily, and can not affect the frame per second of imaging, because the time of scanning one frame is fixing, also linearly reduces unlike scanning the increase imaging frame rate of frame per second along with scanning density in conventional imaging method.The too low meeting of certain reception line density causes space lack sampling and sacrifices picture quality, receives line density too high, can increase computation complexity, according to practical experience, receives line interval and equals 1/2 of array element distance or angle and can obtain good picture quality.Sweep limit still in above figure is example, and supposing that a certain bar receives the center that line is set in No. 7 array elements is starting point, perpendicular to the straight line of detecting head surface.Receive citing on line and give 5 impact points, respectively with the signal of triangle, circle, rectangle, rhombus and pentagon, be labeled as a, b, c, d, e point respectively.As seen from the figure, a point is in the beam area that No. 7 array elements are launched, b point is in the beam area that 6,7, No. 8 array elements are launched, c point is in the beam area that 5,6,7,8,9 good array elements are launched, d point is in the beam area that 4,5,6,7,8,9, No. 10 array elements are launched, and e point is in the beam area that 3,4,5,6,7,8,9,10, No. 11 array elements are launched.Therefore, utilize dynamic aperture technology when Beam synthesis, the array element only selecting launching beam scope to cover at the point of correspondence participates in Beam synthesis.This new equipment is in very dark position in theory, and the transmitting of all array element can cover, and also just can adopt the transmitting of all array element, receive echo participation Beam synthesis.But the more port numbers being namely equivalent to Beam synthesis of the array number participated in are more, calculated amount also can linearly increase, therefore need to select suitable numerical value according to the situation of probe to reduce computation complexity port number, the port number that such as probe of 128 array elements generally receives is set to 64, and namely Beam synthesis uses at most the echo of 64 array elements around.
For b, e point above-mentioned, Oi is designated as the center of each array element, and Si (t) is the echoed signal of each array element, then b, e spot beam synthesis signal be S (tb), S (te):
S(tb)＝S(2*D(O7,b)/C)＝SUM{Si(2*D(Oi,b)/C)},i＝6～8
S(te)＝S(2*D(O7,e)/C)＝SUM{Si(2*D(Oi,e)/C)},i＝3～11
Wherein, D (Oi, e) distance of Oi to e is expressed as, C is sound wave velocity of propagation in media as well, Signal averaging after SUM{} represents multiple communication channel delay (also comprises different port number signal to add up the normalization of amplitude in real system, this Amplitude Compensation technical term techniques well known, launches to introduce no longer in detail).From formula, from Oi launch sound wave through D (Oi, e) apart from rear arrival e impact point, the echo of e impact point reflection returns i-th array element through D (Oi, e) again, is received by this array element, therefore the time delay of e echo is 2*D (Oi, e)/C.Beam synthesis delay calculating method in conventional imaging techniques is then concerning all reception array element, and the wave beam of transmitting is all that hypothesis sends from No. 7 array elements, and the signal namely for the Beam synthesis of b, e point is:
S(tb)＝S(2*D(O7,b)/C)＝SUM{Si([D(O7,b)+D(Oi,b)]/C)},i＝6～8
S(te)＝S(2*D(O7,e)/C)＝SUM{Si([D(O7,e)+D(Oi,e)]/C)},i＝3～11
The contrast of two groups of formulas can find, conventional imaging techniques launches constant time lag to focus on, and receives and can realize with degree of depth dynamic focusing, new method then utilize the echoed signal of each array element of buffer memory achieve transmitting and receiving synchronous with degree of depth dynamic focusing.Thus ensure that within the scope of near field to far field entire depth and all obtain uniform spatial resolution, and along with the increase of the degree of depth, the array number participating in the transmitting and receiving of synthesis all increases, thus improves signal to noise ratio (S/N ratio), also just can ensure that image obtains good penetration power.The time delay of the Beam synthesis in above formula is determined in advance to each degree of depth of each array element, and the velocity of sound in medium is also generally fixing (being fixed as 1540m/s as the velocity of sound in human body soft tissue is approximate), therefore the time delay of each passage to each degree of depth can be calculated in advance when realizing, create a look-up table, directly search time delay look-up table when real time execution and can realize Beam synthesis fast.Less preferred embodiment, also can when Beam synthesis in real time according to each array element and the distance computation delay value treating focus point under the prerequisite that requirement of real time is not high.Each array element then treats the degree of depth of focus point to the Distance geometry of wave beam reference position according to array element to the distance treating focus point, utilize trigonometric function to calculate, the computing formula such as going up D (O3, e) in illustrated example is:
D(O3,e)＝sqrt(16*P*P+De*De)
Wherein P is array element distance, and D (O3, e) is expressed as the distance of O3 to e, and the arithmetic operation of extraction of square root is asked in sqrt representative.
In above-described embodiment, transmitting and receiving are a shared array element, and also can transmit and receive need not same array element, time such as, in upper figure No. 7 array elements are launched, select No. 8 array elements be close to for reception.For e impact point, then corresponding Beam synthesis signal is expressed as:
S(te)＝S(2*D(O7,e)/C)＝SUM{Si([D(Oi,e)+D(Oi-1,e)]/C)},i＝4～12
Wherein, the distance of the sound wave arrival e impact point that D (Oi-1, e) launches for i-1 array element, the echo that D (Oi, e) is e impact point arrives the distance of i array element.
Multiple receiving cable superposition, because the noise of each passage is random often, and signal is relevant, therefore can improve the signal to noise ratio (S/N ratio) of signal after superposition.In like manner, in described device, can suitably increase the array number simultaneously received, such as, in prior art, the configuration of receiving circuit chip routine is exactly the parallel reception that a chips supports 8 passages, in described system, just the echoed signal that corresponding for 8 of a receiving chip receiving cable 8 receive array element can be participated in Beam synthesis simultaneously, the Beam synthesis delay Equation of these 8 passages is as shown in formula above.
The wave beam that single array element is launched is very wide, but may emitted energy is too low cannot penetrate some very dark positions, therefore, can improve the power launched by the array number suitably increasing transmitted in parallel.Because the aperture of launching is larger simultaneously, launching beam will be narrower, and therefore should not arrange too large, the array number such as simultaneously launched is defined as and is no more than 8.
As shown in Figure 5, give the embodiment result that a single channel is launched, single channel receives, maximum Beam synthesis port number is configured to 64, and imaging frequency is 10MHz.As seen from Figure 4, the target spot vertical and horizontal resolution in module is all very good, and the target spot of the 4cm degree of depth is also clear and legible, the validity of visible the method.
The principle of work of supersonic imaging device in the present invention:
A kind of supersonic imaging device, comprise probe mechanism 1, image scanning mechanism 2 and main unit mechanism 3, described probe mechanism 1, image scanning mechanism 2 and main unit mechanism 3 are electrically connected successively,
Described probe mechanism 1 comprises probe, is provided with multiple array element in described probe;
Described image scanning mechanism 2 comprises high-voltage driving device 10, analog signal processing device 5, analog-to-digital conversion device 6 and control/DIU data interface unit 7, wherein,
The emission control parameter signal that described high-voltage driving device 10 transmits for Receiving Host mechanism 3, described emissioning controling signal can comprise transmitted waveform and transponder pulse repetition period, the high-voltage signal that described transmitted waveform signal generates after high drive sends described probe mechanism 1 to
Described analog signal processing device 5 launches isolation, amplification, filtering process for the described ultrasonic echo signal received being carried out successively high pressure, and sends the echoed signal after process to analog-to-digital conversion device 6,
Described digital data transmission for converting the echoed signal after described process to digital signal, and is given control/DIU data interface unit 7 by described analog-to-digital conversion device 6,
The described digital signal that described control/DIU data interface unit 7 receives for buffer memory, and upload to main unit mechanism 3 through data-interface, the controling parameters signal of described image scanning mechanism 2 is also sent to for receiving described main unit mechanism 3, described controling parameters signal comprises transmitted waveform control signal, pulse repetition time signal, and by described controling parameters signal (low voltage signal, general voltage is less than 5V) send described high-voltage driving device 10 to, after high-voltage driving device process, generally voltage increases to more than 50V;
Described main unit mechanism 3 comprises control device 8 and digital signal processing device 9, wherein,
Described parameter for generation of the controling parameters of image scanning mechanism, and is sent to described image scanning mechanism 2 by described control/DIU data interface unit 7 by described control device 8.
Described digital signal processing device 9 is electrically connected with described control/DIU data interface unit 7, comprise the first processing section and the second processing section, described first processing section is used for carrying out Beam synthesis to the digital signal of the echo of described not homogeneous scanning, described second processing section is used for carrying out process to the signal that Beam synthesis exports and generates ultrasonoscopy, and generation ultrasonoscopy is uploaded to output display on display.
Described first processing section in described digital signal processing device is arranged in described imaging scanner 2, and the output signal of Beam synthesis uploads to by control/DIU data interface unit 7 process that described main unit mechanism 3 carries out described second processing section again.
The signal that ADC gathers also can not directly be uploaded main frame and carry out the process such as Beam synthesis after buffer memory, the solution of suboptimum also can increase the calculating sub module such as a DSP/FPGA/CPU/GPU in image scanning module, Beam synthesis (or comprising the signal transacting such as dynamic filter) is uploaded host module again after this calculating sub module completes, thus alleviate the computation burden of main frame, but additionally can increase cost and power consumption.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a supersonic imaging device, it is characterized in that, comprise probe mechanism (1), image scanning mechanism (2) and main unit mechanism (3), described probe mechanism (1), image scanning mechanism (2) and main unit mechanism (3) are electrically connected successively
Described probe mechanism (1) comprises probe, is provided with multiple array element in described probe;
Described image scanning mechanism (2) comprises high-voltage driving device (10), analog signal processing device (5), analog-to-digital conversion device (6) and control/DIU data interface unit (7), wherein,
The emission control parameter signal that described high-voltage driving device (10) transmits for Receiving Host mechanism (3), described emissioning controling signal can comprise transmitted waveform and transponder pulse repetition period, the high-voltage signal that described transmitted waveform signal generates after high drive sends described probe mechanism (1) to
Described analog signal processing device (5) launches isolation, amplification, filtering process for the described ultrasonic echo signal received being carried out successively high pressure, and sends the echoed signal after process to analog-to-digital conversion device (6),
Described digital data transmission for converting the echoed signal after described process to digital signal, and is given control/DIU data interface unit (7) by described analog-to-digital conversion device (6),
The described digital signal that described control/DIU data interface unit (7) receives for buffer memory, and upload to main unit mechanism (3) through data-interface, also send to the controling parameters signal of described image scanning mechanism (2) for receiving described main unit mechanism (3), and send described emission control parameter signal to described high-voltage driving device (10);
Described main unit mechanism (3) comprises control device (8) and digital signal processing device (9), wherein,
Described parameter for generation of the controling parameters of image scanning mechanism, and is sent to described image scanning mechanism (2) by described control/DIU data interface unit (7) by described control device (8).
Described digital signal processing device (9) is electrically connected with described control/DIU data interface unit (7), comprise the first processing section and the second processing section, described first processing section is used for carrying out Beam synthesis to the described digital signal of the echo of not homogeneous scanning, described second processing section is used for carrying out process to the signal that Beam synthesis exports and generates ultrasonoscopy, and generation ultrasonoscopy is uploaded to output display on display.
2. a kind of supersonic imaging device according to claim 1, it is characterized in that, described first processing section in described digital signal processing device is arranged in described imaging scanner (2), and the output signal of Beam synthesis uploads to by control/DIU data interface unit (7) process that described main unit mechanism (3) carries out described second processing section again.
3. the ultrasonic imaging method of a kind of supersonic imaging device according to claim 1, is characterized in that, comprise the following steps:
Step 1, pre-sets the controling parameters of imaging scanning mechanism (2), and the controling parameters signal of transmitting obtains high-voltage signal after high-voltage driving device (10) process, described high-voltage signal is sent to probe mechanism (1);
Step 2, under the effect of described high-voltage signal, probe starts to carry out transmitting and receiving signal, and the ultrasonic echo signal of reception is transferred to described image scanning mechanism (2);
Step 3, carries out analog signal processing to described ultrasonic echo signal, analog-to-digital conversion obtains digital signal, carry out buffer memory and upload main unit mechanism (3) to described digital signal;
Step 4, carries out Beam synthesis process to the described digital signal of the echo of the not homogeneous scanning of uploading and obtains Beam synthesis signal, carry out further digital signal processing and obtain ultrasonoscopy, and be uploaded to display to described Beam synthesis signal.
4. a kind of ultrasonic imaging method according to claim 3, it is characterized in that, step 1 specifically comprises the steps:
Step 1.1, control device in main unit mechanism (3) arranges the controling parameters of described image scanning mechanism (2) according to the image-forming condition that user sets, the controling parameters signal of described image scanning mechanism (2) is sent to described image scanning mechanism (2) by control/DIU data interface unit (7)
Step 1.2, the controling parameters signal of reception is converted to the high-voltage signal for launching by the high-voltage driving device in described image scanning mechanism (2), and described high-voltage signal is sent to the probe in probe mechanism (1).
5. a kind of ultrasonic imaging method according to claim 3, it is characterized in that, in step 2, during each scanning, in probe, at least one array element is produced ultrasound wave after high-voltage signal excitation and is transmitted in medium, described ultrasound wave enters the ultrasonic echo producing scattering or reflection after medium encounters target, during each scanning, at least one array element is for receiving described ultrasonic echo, and described ultrasonic echo signal is transferred to described image scanning mechanism (2).
6. a kind of ultrasonic imaging method according to claim 3, it is characterized in that, step 3 specifically comprises the steps:
Step 3.1, the described ultrasonic echo signal received is carried out high pressure and is launched isolation, amplification, filtering process by analog signal processing device (5) successively, and sends the echoed signal after process to analog-to-digital conversion device (6),
Step 3.2, described analog-to-digital conversion device (6) converts the echoed signal after described process to digital signal, and gives control/DIU data interface unit (7) by described digital data transmission,
Step 3.3, the described digital signal that described control/DIU data interface unit (7) buffer memory receives, and upload to described main unit mechanism (3) through data-interface.
7. a kind of ultrasonic imaging method according to claim 3, it is characterized in that, step 4 specifically comprises the steps:
Step 4.1, the digital signal of delay parameter to the echo of the not homogeneous scanning that described control/DIU data interface unit (7) is uploaded that digital signal processing device (9) is determined according to the locus of launching array element, reception array element and received scanline carries out time delay superposition, thus realize the Beam synthesis of transmitting and receiving simultaneously, form Beam synthesis signal
Step 4.2, carries out dynamic filter, envelope detection, log-compressed, display numeral scan transformation processing procedure acquisition ultrasonoscopy to described Beam synthesis signal, is outputted on display by described ultrasonoscopy and show.
8. a kind of ultrasonic imaging method according to claim 7, it is characterized in that, in step 4.1, calculate the parameter of Beam synthesis according to the locus of launching array element, reception array element and received scanline and be stored in described control device (8) in advance, the echo of parameter to not homogeneous scanning directly searching described storage when Beam synthesis process superposes synthesis after different time delays.
9. a kind of ultrasonic imaging method according to claim 7, is characterized in that, in step 4.2, described Beam synthesis processing procedure also comprises a dynamic aperture processing procedure.
10. a kind of ultrasonic imaging method according to claim 3, is characterized in that, described probe scan the array element for launching at every turn and the element position for receiving identical or different.
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