WO2015115676A1 - Procédé et appareil de synthèse d'image utilisant une onde plane dans un transducteur ayant un sous-réseau - Google Patents

Procédé et appareil de synthèse d'image utilisant une onde plane dans un transducteur ayant un sous-réseau Download PDF

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Publication number
WO2015115676A1
WO2015115676A1 PCT/KR2014/000774 KR2014000774W WO2015115676A1 WO 2015115676 A1 WO2015115676 A1 WO 2015115676A1 KR 2014000774 W KR2014000774 W KR 2014000774W WO 2015115676 A1 WO2015115676 A1 WO 2015115676A1
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Prior art keywords
delay
image
scan line
sub
array
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PCT/KR2014/000774
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English (en)
Korean (ko)
Inventor
박성배
배무호
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알피니언메디칼시스템 주식회사
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Priority to KR1020167019637A priority Critical patent/KR102025258B1/ko
Priority to PCT/KR2014/000774 priority patent/WO2015115676A1/fr
Publication of WO2015115676A1 publication Critical patent/WO2015115676A1/fr

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    • 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
    • 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
    • G01S15/8927—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array using simultaneously or sequentially two or more subarrays or subapertures
    • 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
    • A61B8/4483—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer
    • A61B8/4488—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer the transducer being a phased array

Definitions

  • Embodiments of the present invention relate to an image synthesis method and apparatus using plane waves in a transducer having a sub array.
  • the ultrasound system transmits ultrasound to an object by using a probe, receives a reflection signal reflected from the object, and converts the received reflection signal into an electrical signal to generate an ultrasound image.
  • Ultrasonic systems have non-invasive and non-destructive properties and are widely used in the medical field for obtaining information inside a living body. Ultrasound systems are important in the medical field because they can provide real-time images of tissues inside a living body without the need for a surgical operation to directly incise and observe the living body.
  • an embodiment of the present invention is to provide a method and apparatus for synthesizing images using plane waves in a transducer having a sub array.
  • an embodiment of the present invention includes a plurality of sub-arrays each composed of one or more elements, and transmit a non-focused ultrasound to an object and receive a reflection signal from the object.
  • Producer arrays A delay signal generator configured to set a first delay with respect to the reflected signal to the element based on at least one reference scan line corresponding to a position on the transducer array to generate a delay signal;
  • a summation unit for generating a summation signal by summing the delay signals for each of the sub-arrays;
  • an image synthesizer configured to synthesize the image frame by setting a second delay with respect to the sum signal for each image generation scan line for the image frame to be generated.
  • the step of transmitting unfocused ultrasound to the object receiving a reflected signal from the object; Generating a delay signal by setting a first delay for the reflected signal to the element based on at least one reference scan line corresponding to a position on the transducer array; Generating a sum signal by summing the delay signals for each sub array; And synthesizing the image frame by setting a second delay with respect to the sum signal for each image generation scan line for the image frame to be generated.
  • the transducer array when using a method of wirelessly connecting between the transducer module and the host, the transducer array is divided into a plurality of sub-arrays while using a plane wave to preprocess the received signal.
  • the weight is lighter, and thus the user's ease of use is improved.
  • the frame rate of the image frame generated by using the plurality of reference scan lines and generating the corresponding number of plane waves may increase the resolution of the generated image frame even though the frame rate of the image frame is somewhat reduced.
  • the effect of reducing the amount of data transmitted from the transducer module to the host occurs.
  • FIG. 1 is a block diagram illustrating an ultrasound medical apparatus 100 according to an exemplary embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example in which the transducer array 110 is divided into a plurality of sub arrays and a reference scan line described later.
  • FIG 3 is a view illustrating the micro beamformer 130 in detail.
  • FIG. 4 is a diagram illustrating a method of calculating a first delay amount set by the analog delay units 311-314 based on the set reference scan line.
  • FIG. 5 is a diagram illustrating a method of synthesizing an image frame by receiving a sum signal converted into a digital signal by the image synthesizing unit 150.
  • FIG. 6 illustrates an example in which the image synthesizing unit 150 generates image data on one image generation scan line SC (0).
  • FIG. 7 is a diagram illustrating a position of a scan line when there are a plurality of reference scan lines.
  • FIG. 8 is a diagram illustrating channel data generated corresponding to each plane wave generated in the process of generating one image frame.
  • FIG. 9 illustrates the position of each reference scan line and a delay setting unit 910-990 corresponding to each reference scan line in the generated image frame when the transducer array 110 having the shape as shown in FIG. 2 is illustrated. Drawing.
  • FIG. 10 is a flowchart illustrating an image compositing method according to an embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating an ultrasound medical apparatus 100 according to an exemplary embodiment of the present invention.
  • the ultrasound medical apparatus 100 may include a transducer array 110, a transceiver 120, a micro beamformer 130, and an ADC (AD).
  • Converter 140, the image synthesizing unit 150, and the display unit 160, the components of the ultrasound medical apparatus 100 in the present embodiment is not necessarily limited thereto.
  • the transceiver 120, the micro beamformer 130, and the ADC 140 correspond to the front end processor 180, and the micro beamformer 130, the ADC 140, the image synthesizer 150, and the display.
  • the unit 160 corresponds to the host 190, and includes the transducer array 110 and the shear processor 180 to form the transducer module.
  • the ADC 140 is described as being included in the front end processor 180, but according to the exemplary embodiment, the ADC 140 may be included in the host 190.
  • Transducer array 110 includes a plurality of subarrays, each of which consists of one or more transducer elements 111, and transmits unfocused ultrasound to an object in the viewing area and then reflects the non-focused ultrasound from the object in the viewing area. Receive the signal.
  • the non-condensed ultrasound includes at least one of a plane wave and a wide beam, and in the following description, the non-condensed ultrasound is a plane wave.
  • the transducer array 110 may transmit the plane wave to the observation area under the control of the image synthesizing unit 150 (or a separate controller).
  • the transducer array 110 transmits the plane wave to the object in the viewing area by using the transducer elements 111 in the transducer array 110 and receives the reflected signal reflected from the object.
  • FIG. 2 is a diagram illustrating an example of a case in which the transducer array 110 is divided into a plurality of sub arrays, and an example of a set reference scan line.
  • the transducer array 110 may be divided into a plurality of sub arrays 210-260.
  • the transducer array 110 includes six sub arrays 210-260, and each sub array 210-260 includes four transducer elements 111.
  • each sub array may have various numbers of transducer elements 111, and the number of transducer elements 111 of each sub array may also be different.
  • the reference scan line may be set perpendicular to the arrangement direction of the transducer array 110 at a point on the transducer array 110.
  • the example shown in FIG. 2 illustrates a case where there is one reference scan line, and when the reference scan line is one, the position of the reference scan line is a plane in which the transducer element 111 is arranged on the transducer array 110. It may be located in the center of the present invention is not limited thereto.
  • Each sub array 210-260 may be composed of a plurality of spatially adjacent transducer elements 111 in the transducer array 110.
  • the transceiver 120 applies a voltage pulse to the transducer array 110 so that unfocused ultrasound is output from each transducer element 111 of the transducer array 110.
  • the transceiver 120 performs a function of switching transmission and reception so that the transducer array 110 alternately performs transmission or reception.
  • the micro beamformer 130 generates a delay signal by setting a first delay, which is an amount of delay, for each of the transducer elements 111 based on the set positions of one or more reference scan lines, for each sub element.
  • a delay signal is added to each array 210 to 260 to generate a sum signal.
  • FIG. 3 is a diagram illustrating the micro beamformer 130 in detail.
  • the micro beamformer 130 includes a delay signal generator 300 and an adder 370.
  • the delay signal generator 300 generates a delay signal by setting a first delay for each of the transducer elements 111 based on the positions of one or more reference scan lines for the reflected signal received from the transceiver 120.
  • the delay signal generator 300 includes a plurality of delay units 310-360, and each delay unit 310-360 receives reflection signals from the plurality of sub arrays 210-260, respectively.
  • the first delay unit 310 receives the reflected signal from the first sub array 210
  • the second delay unit 320 receives the reflected signal from the second sub array 220
  • the third delay unit 330 receives the reflected signal from the third sub-array 230
  • the fourth delay unit 340 receives the reflected signal from the fourth sub-array 240
  • the fifth delay unit 350 receives the fifth signal.
  • the reflection signal is received from the sub array 250
  • the sixth delay unit 360 receives the reflection signal from the sixth sub array 260.
  • Each delay unit 310-360 includes as many analog delay units 311-314 as the number of transducer elements 111 of the corresponding subarrays 210-260, and each analog delay unit 311-314. Receives the reflected signal from each transducer element 111 of the corresponding sub array 210-260.
  • reference numerals for the analog delay units in the remaining delay units 320-360 except for the analog delay units 311-314 of the first delay unit 310 are omitted.
  • FIG. 4 is a diagram illustrating a method of calculating a first delay amount set by the analog delay units 311-314 based on the set reference scan line.
  • the reflection signal received from the first sub array 210 is input to the first delay unit 310.
  • the eleventh analog delay unit 311 receives a reflected signal from the eleventh transducer element 211 of the first sub array 210
  • the twelfth analog delay unit 312 receives the first sub array.
  • the thirteenth analog delay unit 313 receives the reflected signal from the thirteenth transducer element 213 of the first sub array 210.
  • the fourteenth analog delay unit 314 receives the reflected signal from the fourteenth transducer element 214 of the first sub array 210.
  • the magnitude of the first delay set by the analog delay units 311-314 corresponding to each transducer element 211-214 of the first sub array 210 is set. It is calculated as in Equation 1.
  • Equation 2 C is the speed of sound, and r and r 1 may be calculated as in Equation 2.
  • Equation 2 Zp represents the distance between the transducer array 110 and the image position on the set reference scan line, r is between the position of the transducer array 110 on the reference scan line and the reference point of the corresponding sub array 210
  • r 1 represents a transducer element (eg, an eleventh transducer element) corresponding to the analog delay unit 311 where the first delay and the position of the transducer array 110 on the reference scan line are to be calculated.
  • 211) means the distance to the center of the.
  • the reference point of the sub array 210 means a central portion of the sub array 210, but the present invention is not limited thereto.
  • the first delay set in the analog delay unit 311 may be set in the sub array 210 to which the corresponding transducer element 211 corresponding to the analog delay unit 311 belongs.
  • the position of the reference point and the distance between the corresponding transducer element 211 and the reference scan line may be set.
  • the first delay may be set for the remaining analog delay units 312-314 in a similar manner to the analog delay unit 311.
  • each analog delay unit may generate a delay corresponding to the calculated first delay amount.
  • Analog delay units 311-314 are configured by determining the values of the circuits constituting 311-314.
  • the analog delay units 311-314 may include a mixer circuit, a phase shifter, a charge coupled device, a memory, a sample and hold circuit. And it may include a circuit such as an analog filter (Analog Filter), the operation of the circuit constituting the analog delay unit (311-314) is well-known technology and description thereof is omitted.
  • the adder 370 includes a plurality of adder modules 371-376 corresponding to the delay units 310-360, respectively. Each summation module 371-376 generates a summation signal by summing the delay signals generated for each subarray 210-260 for each subarray 210-260.
  • the ADC 140 converts the analog sum signal received from the micro beamformer 130 into a digital signal and transmits the converted signal to the image synthesizer 150.
  • the image synthesizing unit 150 receives the sum signal converted into a digital signal for each sub array, generates data for each sub array, and generates channel data including data for each sub array corresponding to all sub arrays.
  • the image synthesizer 150 sets a second delay in the channel data for each of the plurality of image generation scan lines set using the generated channel data to synthesize the image frame.
  • FIG. 5 is a diagram illustrating a method of synthesizing an image frame by receiving a sum signal converted into a digital signal by the image synthesizing unit 150.
  • the channel data is received and stored by the summation module 371-376 by the summation signal converted into a digital signal for each summation module 371-376. If there is one reference scan line, one channel data is generated by the image synthesizer 150, and one channel data includes sub data (D1-D6), which are digitized sum signals corresponding to the number of sub arrays (210-260). ) Is stored.
  • the image synthesizing unit 150 based on the position of the image generating scan line and the position of the sub arrays 210 to 260 corresponding to the sub data D1 to D6 for each image generating scan line set on the image frame to be generated.
  • Image data is generated by setting delays to sub data D1 to D6 corresponding to the sum signal for each sub array. In this way, image data is generated for all image generation scan lines SC (0), SC (1), ..., SC (N-1), and the generated image frames are collected and one image frame is obtained.
  • the image synthesizing unit 150 includes a plurality of delay setting units 510-540 that set second delays with respect to channel data for each set image generation scan line.
  • Each delay setting unit 510-540 generates image data corresponding to a position corresponding to each image generation scan line in an image frame to be generated.
  • the image synthesizing unit 150 generates the image generating scan lines SC (0), SC (1), and the like by the image generating scan lines SC (0), SC (1), ..., SC (N-1). ..., the position in the image frame of the SC (N-1) and the position (e.g., the center of each sub-array 210-260) corresponding to the sub-array-specific data (e.g., the sub data D1-D6).
  • image data is generated for each image generation scan line to synthesize the entire image frame.
  • the first delay setting unit 510 generates image data (SC (0) image data) corresponding to the position of the image generation scan line SC (0), and the second delay setting unit 520 generates the image generation scan line SC
  • the image data corresponding to the position of (1) (SC (1) image data) is generated, and the third delay setting unit 530 generates the image data (SC (2) corresponding to the position of the image generation scan line SC 2.
  • FIG. 6 illustrates an example in which the image synthesizing unit 150 generates image data on one image generation scan line SC (0).
  • the first delay setting unit 510 generates image data corresponding to the position of the image generation scan line SC (0) in the image frame to be generated using all the sub data D1-D6.
  • the first delay setting unit 510 sets second delays to all sub data D1 to D6 and generates second delays to generate image data corresponding to the position of the image generation scan line SC (0).
  • the sub data D1-D6 are added together to generate image data corresponding to the position of the image generation scan line SC 1.
  • the first sub array 210 corresponds to the sub data D1
  • the second sub array 220 corresponds to the sub data D2
  • the third sub array 230 corresponds to the sub data D3.
  • a fourth sub array 240 corresponds to the sub data D4
  • a fifth sub array 250 corresponds to the sub data D5
  • a sixth sub array 260 corresponds to the sub data D6.
  • the image data corresponding to the position of the image generation scan line SC (0) with respect to the image position I 1 in the frame is expressed by Equation 3 below.
  • D i, delay (ri-Z1) sets a second delay for all sub data D i , and the distance r between the image position I 1 and the position of the reference point of the corresponding sub array 210-260. i ) is set as much as (r i -Z 1 ) minus the distance Z 1 between the subarrays 210-260 and the image position I 1 .
  • N corresponding to the number of sub arrays is 6
  • the image positions I on the image generation scan line SC (0) are obtained by obtaining D i, delay (ri-Z1) for all sub data D1-D6 and adding them, respectively.
  • Image data corresponding to 1 can be generated.
  • Z 1 means the distance between the corresponding transducer element 211 and image position I 1 on image generation scanline SC (0)
  • r 1 to r 6 are each Means the distance between the position of the reference point of the first sub array 210 to the sixth sub array 260 and the image position I 1 .
  • the reference point may be a central position within the first sub array 210 to the sixth sub array 260.
  • FIG. 6 illustrates an example in which the first delay setting unit 510 generates image data corresponding to the position of the image generation scan line SC (0), but in a similar manner, the remaining delay setting units 520 to 540 may perform the rest.
  • Image generation corresponding to the image generation scan lines SC (1), SC (2),..., SC (N-1) may be generated.
  • the display unit 160 records the data obtained by the image synthesizing unit 150 in a memory and maps the data to the pixel position of the display device for display.
  • the frame rate is faster than when the plane wave is not used.
  • the number of connecting lines interconnected between the transducer module including the transducer array 110 and the host displaying the ultrasound image is reduced, thereby increasing economic efficiency.
  • the weight is lighter, and thus the user's ease of use is improved.
  • FIG. 7 is a diagram illustrating a position of a scan line when there are a plurality of reference scan lines.
  • reference scan lines corresponding to a plurality of preset positions of the transducer array 110 may be set and used.
  • the planar ultrasound is generated the same number of times as the number of preset reference scan lines in the transducer array 110.
  • the delay signal generator 300 generates a summation signal in which a first delay is set whenever a planar ultrasonic wave is generated and a reflection signal is received.
  • the delay signal generator 300 sets a first delay for the reflected signal for each transducer element 111 based on the set position of each reference scan line, and sets the first delay setting operation by the number of reference scan lines. To perform.
  • the delay signal generator 300 sets the first delay for each transducer element 111 based on positions of different reference scan lines for each plane wave.
  • the delay signal generator 300 sets the first delay for each transducer element 111 based on the position of one reference scan line. Since the first delay is set in the same manner as described in the description of 4, further detailed description is omitted.
  • the adder 370 generates a sum signal for each sub array 210 to 260 by summing delay signals for each sub array 210 to 260 generated for each plane wave generated in the process of generating one image frame. Accordingly, the number of summation signals for each of the sub arrays 210 to 260 generated when the plane waves are generated by the number of reference scan lines is the same as the number of reference scan lines.
  • FIG. 8 is a diagram illustrating channel data generated corresponding to each plane wave generated in the process of generating one image frame.
  • the image synthesizing unit 150 receives a sum signal converted into a digital signal for each sub array for each plane wave generated in the process of generating one image frame, generates data for each sub array, and includes a plurality of sub array data. Generate data.
  • the image synthesizer 150 when three plane waves are generated during the generation of one image frame, the image synthesizer 150 generates three channel data 810, 820, and 830.
  • the three channel data 810, 820, and 830 generated here are generated based on reference scan lines corresponding to one plane wave, respectively.
  • the first channel data 810 may be generated using a first reference scan line. It is generated by adding the delay signals for each of the generated sub arrays 210 to 260, and the second channel data 820 is generated by using the delay signals for each of the sub arrays 210 to 260 generated using the second reference scan line.
  • the third channel data 830 is generated by using a delay signal for each sub array 210 to 260 generated using the third reference scan line.
  • the image synthesizer 150 generates image data of an image generation scan line by using channel data corresponding to each reference scan line.
  • the image synthesizer 150 generates image data of an image generation scan line of an area corresponding to each reference scan line in the image frame by using channel data corresponding to each reference scan line.
  • FIG. 9 illustrates the position of each reference scan line and a delay setting unit 910-990 corresponding to each reference scan line in the generated image frame when the transducer array 110 having the shape as shown in FIG. 2 is illustrated. Drawing.
  • first to eighth delay setting units 910 to 930 generate image data in the image area corresponding to the first reference scan line, and image areas corresponding to the second reference scan line in the image area corresponding to the second reference scan line.
  • the sixteenth delay setting unit 940-960 generates image data, and the image area corresponding to the third reference scan line is generated by the seventeenth through twenty fourth delay setting units 970-990.
  • the first to eighth delay setting units 910 to 930 use the first channel data 810, which is channel data corresponding to the first reference scan line, to generate the image generation scan lines SC (0), SC (1), and the like. ..., to generate image data corresponding to SC (7).
  • the first to eighth delay setting units 910 to 930 correspond to the image generation scan lines SC (0), SC (1), ..., SC (7) using the first channel data 810. Since the method of generating the image data is the same as the method described with reference to FIG. 5, a detailed description thereof will be omitted.
  • the operation of the delay setting units 910-990 differs from the operation of the delay setting units 510-540 in FIG. 5.
  • the delay setting units 940-990 corresponding to other reference scan lines may have different channel data. (Eg, first channel data 810 and second channel data 820) to generate image data.
  • the frame rate of the image frame generated in inverse proportion to the number of plane waves generated while generating one image frame is somewhat reduced. Even if there is an effect of increasing the resolution of the generated image frame.
  • the ultrasound medical apparatus 100 is not limited to the case where the transducer module and the host are connected by wire, but may also be used when the wireless connection is performed.
  • micro beamforming is performed at the shear processor included in the transducer module to reduce the interconnection between the transducer module and the host.
  • the wired connection method may be applied when the transducer array is a 2D array, but the present invention is not limited thereto and may be applied to an environment using various transducer arrays such as a 1D transducer array and a 3D transducer array.
  • the micro beamforming is performed in the front end processor included in the transducer module to reduce the amount of data transmitted from the transducer module to the host.
  • the wireless connection method may be applied to the case where the transducer array is a 1D array or a portable ultrasonic imaging apparatus or a low specification ultrasonic imaging apparatus, but the present invention is not limited thereto.
  • the ADC 140 is included in the front end processor 180, and the front end processor 180 transmits the AD converted data to the host.
  • FIG. 10 is a flowchart illustrating an image compositing method according to an embodiment of the present invention.
  • an image synthesis method includes transmitting a non-focused ultrasound wave to an object in a transducer array including a plurality of sub arrays each including one or more elements (S1010), and receiving a reflection signal from the object.
  • a delay signal by setting a first delay for the reflected signal for each element based on positions of one or more reference scan lines in operation S1030, summing the delay signals for each sub array, and adding up the sum signal.
  • step S1010 the plane array is transmitted from the transducer array 110 to the observation area under the control of the image synthesizing unit 150 (or a separate controller), and in step S1020, the reflection signal from which the transducer array 110 is reflected from the object Receive Processes S1010 and S1020 are performed in the above-described transducer array 110 and the transceiver unit 120, and further detailed description thereof will be omitted.
  • Process S1030 is performed by the delay signal generator 300.
  • the first delay for the reflected signal received from the transceiver 120 based on the position of one or more reference scan lines is determined for each transducer element 111. Set to generate a delay signal.
  • Process S1030 is the same as the operation in the above-described delay signal generation unit 300, so a detailed description thereof will be omitted.
  • Process S1040 is performed by the adder 370, and the adder 370 includes a plurality of adder modules 371-376 corresponding to each delay unit 310-360 in the delay signal generator 300.
  • each of the summation modules 371-376 generates a summation signal by summing the delay signals generated for each of the subarrays 210-260 for each of the subarrays 210-260.
  • Process S1040 is the same as the above-described operation in the adder 370, so further detailed description thereof will be omitted.
  • Step S1050 is performed by the image synthesizing unit 150.
  • a channel including data for each sub-array corresponding to all sub-arrays is generated by receiving a sum signal converted into a digital signal for each sub-array to generate data for each sub-array.
  • the data is generated, and a second delay is set in the channel data for each of the plurality of image generation scan lines set using the generated channel data to synthesize the image frame.
  • Process S1050 is the same as the operation of the image synthesizing unit 150 described above, and thus further detailed description thereof will be omitted.

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Abstract

Un mode de réalisation de la présente invention concerne un dispositif médical à ultrasons et son procédé de commande, le dispositif médical à ultrasons comprenant : un réseau de transducteurs, qui comprend une pluralité de sous-réseaux, chacun étant constitué d'un ou plusieurs éléments, et qui transmet un ultrason non focalisé à un objet et reçoit un signal réfléchi depuis l'objet ; une unité de génération de signal de retard pour générer un signal de retard en réglant un premier retard pour le signal réfléchi dans l'élément, sur la base d'une ou plusieurs lignes de balayage de référence correspondant aux positions sur le réseau de transducteurs ; une unité d'addition pour générer un signal de somme en additionnant le signal retardé de chacun des sous-réseaux ; et une unité de synthèse d'image pour synthétiser la trame d'image en réglant un second retard pour le signal de somme de chaque ligne de balayage de génération d'image par rapport à la trame d'image à générer.
PCT/KR2014/000774 2014-01-28 2014-01-28 Procédé et appareil de synthèse d'image utilisant une onde plane dans un transducteur ayant un sous-réseau WO2015115676A1 (fr)

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KR1020167019637A KR102025258B1 (ko) 2014-01-28 2014-01-28 서브 어레이를 갖는 트랜스듀서에서 평면파를 이용한 이미지 합성 방법 및 장치
PCT/KR2014/000774 WO2015115676A1 (fr) 2014-01-28 2014-01-28 Procédé et appareil de synthèse d'image utilisant une onde plane dans un transducteur ayant un sous-réseau

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