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WO2021114097A1 - Système d'endoscope à ultrasons et transducteur à ultrasons - Google Patents

Système d'endoscope à ultrasons et transducteur à ultrasons Download PDF

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Publication number
WO2021114097A1
WO2021114097A1 PCT/CN2019/124336 CN2019124336W WO2021114097A1 WO 2021114097 A1 WO2021114097 A1 WO 2021114097A1 CN 2019124336 W CN2019124336 W CN 2019124336W WO 2021114097 A1 WO2021114097 A1 WO 2021114097A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultrasonic
electrode
electrode layer
ultrasonic transducer
wafer
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.)
Ceased
Application number
PCT/CN2019/124336
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English (en)
Chinese (zh)
Inventor
马腾
黄继卿
李永川
王丛知
刘佳妹
刘项力
杨晔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Institute of Advanced Technology of CAS
Original Assignee
Shenzhen Institute of Advanced Technology of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Institute of Advanced Technology of CAS filed Critical Shenzhen Institute of Advanced Technology of CAS
Priority to PCT/CN2019/124336 priority Critical patent/WO2021114097A1/fr
Publication of WO2021114097A1 publication Critical patent/WO2021114097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters

Definitions

  • the invention relates to the technical field of endoscopes, and more specifically, to an ultrasonic endoscope system and an ultrasonic transducer.
  • Endoscopic Ultrasonography System is a medical device that integrates ultrasound and endoscopy. After the endoscope enters the body cavity, the wall of the internal organs or adjacent organs is scanned under the direct vision of the endoscope, and ultrasound images of the various levels below the mucosa of the internal organs wall and surrounding adjacent organs are obtained, such as the mediastinum, pancreas, bile ducts, and Lymph nodes, etc., have great advantages in staging gastrointestinal tumors and judging the nature of tumors originating from the bowel wall.
  • the transducer used in the 360° annular ultrasonic endoscope is generally composed of dozens to hundreds of strip-shaped array elements, which are uniformly arranged in a cylinder along the radial direction into a circle.
  • the outer diameter of the array is generally not more than 13mm, and the center frequency is 3 ⁇ 15MHz, each array element goes out independently, and can be separately excited by electric pulse to obtain 360° circular scanning image.
  • This method does not need to use a DC motor to drive, avoiding the shortcomings of mechanical ring scanning ultrasound endoscopes.
  • Electronic ring scan ultrasound endoscope is suitable for large-scale scanning, overall evaluation and judgment.
  • the ultrasound gastroscope needs to be inserted from the mouth, through the esophagus, and into the stomach cavity. Under normal circumstances, the diameter of the transducer and the entire insertion part cannot be greater than 13mm.
  • the cable needs to be connected to the transducer and enters the human body together, and the cable has a certain wire diameter. When hundreds of cables are twisted into one strand, the overall size and the difficulty of the lead will be important factors for the development of the limit endoscope to more array elements and wider dimensions.
  • the 1.5D planar phased array probe has been used in some applications, but there are relatively few applications in ultrasound endoscopy systems, especially 360-degree circular ultrasound endoscopy systems.
  • the main difficulty is that it is very difficult to lead a large number of cables in a limited space.
  • the present invention provides an ultrasonic transducer to improve the imaging effect of the ultrasonic transducer; the present invention also provides an ultrasonic endoscope system.
  • the present invention provides the following technical solutions:
  • An ultrasonic transducer includes a backing ring arranged in an annular shape and an ultrasonic wafer attached to the outer circumference of the backing ring.
  • the inner ring of the ultrasonic wafer is arranged with a ring on the outer circumference of the backing ring.
  • the inner electrode layer, the outer ring of the ultrasonic wafer is attached with an outer electrode layer around its circumference;
  • the electrode direction of the inner electrode layer is arranged along the axial direction of the backing ring, and the electrode direction of the outer electrode layer is arranged around the circumference of the backing ring.
  • the inner electrode layer includes a center electrode, and multiple sets of side electrodes symmetrically arranged on both sides of the center electrode;
  • the width of the center electrode is arranged in proportion to the width of each of the side electrodes.
  • the width of the center electrode is twice the width of each of the side electrodes.
  • the side electrode includes a first side electrode and a second side electrode which are respectively close to the inner side and the outer side of the center electrode;
  • the internal electrode layer includes a center lead drawn from the center electrode, a first side lead drawn from the first side electrode, and a second side lead drawn from the second side electrode.
  • a ground electrode lead for applying an excitation electric field to the ultrasonic wafer is drawn from the inner electrode layer, and a positive electrode for applying an excitation electric field to the ultrasonic wafer is drawn from the outer electrode layer. Electrode lead.
  • a plurality of electrode array elements are arranged in parallel on the outer electrode layer, and an electrode lead is drawn from each of the electrode array elements.
  • the ultrasonic wafer includes a plurality of elongated ultrasonic array elements arranged in the longitudinal direction along the axial direction of the backing ring, and the plurality of ultrasonic array elements surround the backing ring Are evenly arranged in the circumferential direction;
  • the outer diameter of the ultrasonic wafer is not greater than 13 mm, and the center frequency of the ultrasonic wafer is 3-15 MHz.
  • a first matching layer, a second matching layer and an acoustic lens are sequentially stacked and arranged on the outer periphery of the outer electrode layer.
  • An ultrasonic endoscope system including an endoscope ultrasonic excitation system, an optical imaging system, a display, and a puncture needle system.
  • the puncture needle system includes an insertion part that can be inserted into a subject and is arranged at the front end of the insertion part.
  • the front hard part, the bending part and the flexible tube part of the front end hard part are provided with a ring array ultrasonic transducer, characterized in that the ring array ultrasonic transducer is provided with any one of the above Ultrasonic transducer.
  • the endoscope ultrasonic excitation system includes a secondary excitation system that excites the inner electrode layer and the outer electrode layer respectively.
  • the ultrasonic transducer provided by the present invention includes an annularly arranged backing ring and an ultrasonic wafer attached to the outer circumference of the backing ring.
  • the inner ring of the ultrasonic wafer is arranged with an inner electrode layer surrounding the outer circumference of the backing ring,
  • the outer ring of the ultrasonic wafer is attached with an outer electrode layer around its circumference; the electrode direction of the inner electrode layer is arranged along the axial direction of the backing ring, and the electrode direction of the outer electrode layer is arranged around the circumference of the backing ring.
  • the ultrasonic wafer surrounds the outer peripheral surface of the backing ring arranged in a ring.
  • the inner electrode layer is located on the inner ring of the ultrasonic wafer, and the inner surface of the ultrasonic wafer is excited by electric pulses.
  • the outer electrode layer is located on the outer peripheral surface of the ultrasonic wafer, and the ultrasonic wafer is excited by electric pulses.
  • the electrode direction of the inner electrode layer is perpendicular to the electrode direction of the outer electrode layer.
  • Fig. 1 is a schematic diagram of the arrangement structure of the ultrasonic transducer provided by the present invention
  • FIG. 2 is a schematic diagram of the expanded structure of the inner electrode layer in FIG. 1;
  • FIG. 3 is a schematic diagram of the structure of drawing out electrode wires of the inner electrode layer in FIG. 2;
  • FIG. 4 is a schematic diagram of the expanded structure of the outer electrode layer in FIG. 1;
  • FIG. 5 is a schematic diagram of the arrangement structure of the ultrasound endoscope system provided by the present invention.
  • Fig. 6 is a schematic diagram of the end structure of the ring array ultrasonic transducer in Fig. 5.
  • the invention discloses an ultrasonic transducer, which improves the imaging effect of the ultrasonic transducer; the invention also provides an ultrasonic endoscope system.
  • Fig. 1 is a schematic diagram of the arrangement structure of the ultrasonic transducer provided by the present invention.
  • This embodiment provides an ultrasonic transducer including a backing ring 1 arranged in a ring shape and an ultrasonic wafer 2 attached to the outer circumference of the backing ring 1.
  • the inner ring of the ultrasonic wafer 2 is arranged with a ring surrounding the backing ring 1.
  • the inner electrode layer 3 on the outer circumference, the outer ring of the ultrasonic wafer 2 is attached with an outer electrode layer 4 around its circumference; the electrode direction of the inner electrode layer 3 is arranged along the axial direction of the backing ring 1, and the electrode of the outer electrode layer 4 The direction is arranged around the circumference of the backing ring 1.
  • the ultrasonic wafer 2 surrounds the outer peripheral surface of the backing ring 1 arranged in a ring shape.
  • the inner electrode layer 3 is located on the inner ring of the ultrasonic wafer 2, and the inner surface of the ultrasonic wafer 2 is excited by electric pulses.
  • the outer electrode layer 4 is located on the outer peripheral surface of the ultrasonic wafer 2.
  • the electric pulse is applied to excite the outer surface of the ultrasonic wafer, and the electrode direction of the inner electrode layer 3 is arranged perpendicular to the electrode direction of the outer electrode layer 4.
  • Figure 2 is a schematic diagram of the expanded structure of the internal electrode layer in Figure 1;
  • Figure 3 is a schematic diagram of the electrode wire leading structure of the internal electrode layer in Figure 2;
  • Figure 4 is the expanded structure of the external electrode layer in Figure 1 Schematic.
  • the internal electrode layer 3 includes a center electrode 33 and multiple sets of side electrodes symmetrically arranged on both sides of the center electrode; the width of the center electrode 33 is arranged in proportion to the width of each side electrode.
  • the electrode direction of the inner electrode layer 3 is arranged along the axial direction of the backing ring 1, and its inner electrode layer is provided with a central electrode 33 and multiple groups of side electrodes symmetrically located on both sides of the central electrode 33, and each group of side electrodes includes symmetrically located central electrodes respectively.
  • the two side electrodes on both sides of the width direction of 33 by arranging the width of the center electrode 33 in proportion to the width of each side electrode, the electrodes of different depths along the axial direction of the ultrasonic transducer can be excited by different electric pulses. , The imaging of the ultrasonic transducer is adjusted in its axial direction to achieve the focus of ultrasound at different depths.
  • the width of the center electrode 33 is twice the width of each side electrode.
  • the width of the center electrode 33 is set to be twice that of the side electrodes, and the ultrasonic transducer of the same size can be used to realize the 1.5D replacement 1D imaging scheme.
  • the side electrodes include a first side electrode 32 and a second side electrode 31 respectively close to the inner and outer sides of the center electrode 33;
  • the inner electrode layer 3 includes a center lead Y3 drawn from the center electrode 33, and
  • a first side electrode 32 and a second side electrode 31 are symmetrically arranged on both sides of the center electrode 33.
  • the first side electrode 32 includes two symmetrically located in the width direction of the center electrode 33.
  • the two-side electrodes 31 also include two symmetrically located on the center electrode, and are located outside the first side electrode 32.
  • the electrode lead of the inner electrode layer 3 is set with the center electrode 33 to lead out the central lead Y3 separately.
  • the two lead electrode wires of the first side electrode 32 are combined into a first side lead Y2, and the two lead wires of the second side electrode 31 are drawn out.
  • the electrode wires are combined into a second side lead Y1.
  • the internal electrode layer 33 has three electrode leads Y1, Y2 and Y3, Y1 is the second side lead of the second side electrode 31 of the outermost layer of the internal electrode layer, and Y2 is the first lead of the internal electrode layer 33.
  • the first side lead of one side electrode 32, Y3 is the center lead of the center electrode 33.
  • the inner electrode layer 33 leads to a ground electrode lead that applies an excitation electric field to the ultrasonic wafer
  • the outer electrode layer 4 leads to a positive electrode lead that applies an excitation electric field to the ultrasonic wafer.
  • a plurality of electrode array elements 41 are arranged in parallel on the outer electrode layer 4, and an electrode lead is led out from each electrode array element 41.
  • the electrode direction of the outer electrode layer 4 surrounds the circumference of the backing ring 1, and is arranged perpendicular to the axial electrodes of the inner electrode layer 3.
  • a plurality of electrode array elements 41 arranged in parallel are arranged on the outer electrode layer 4, and each electrode Electrode leads are arranged on the array elements 41, and electric pulses are applied through different electrode leads, and the electrode array elements at different positions on the outer electrode layer around the circumference of the electrode array are excited.
  • the position of the excitation electric field generated on the inner electrode layer 3 is adjusted in the axial direction of the backing block 1, and the excitation electric field generated on the outer electrode layer 4 is adjusted in the circumferential direction of the backing block 1. Both of them excite the ultrasonic wafer together. Ultrasound generated at the position can realize the focus and circumferential deflection of ultrasound imaging in the depth direction, thereby obtaining better image quality.
  • the ultrasonic wafer 2 includes a plurality of elongated ultrasonic array elements arranged in the longitudinal direction along the axial direction of the backing ring, and the multiple ultrasonic array elements are evenly arranged around the circumference of the backing ring; the ultrasonic wafer The outer diameter is not more than 13mm, and the center frequency of the ultrasonic wafer is 3 ⁇ 15MHz.
  • the ultrasonic wafer adopts long strip ultrasonic array elements, and the length of each ultrasonic array element should be consistent with the width of the inner electrode layer and the width of the outer electrode layer. At the same time, it is suitable for the medical application of the ultrasonic transducer on the ultrasonic endoscope system.
  • the outer diameter of the ultrasonic wafer is set to be no more than 13mm, and the center frequency of the ultrasonic wafer is 3-15MHz, so that the ultrasonic transducer with the inner electrode layer and the outer electrode layer in this embodiment can be used to replace the existing ultrasonic transducer.
  • the existing ultrasound endoscope system is used to realize the imaging solution of 1.5D phased array instead of 1D display.
  • the internal electrode layer 3 is composed of a middle electrode, a first side electrode, and a second side electrode.
  • the electrode direction of the internal electrode layer is set to the Y direction, and the electrode lead-out line includes the inner layer.
  • Three electrode leads the middle lead Y3, the first side lead Y2 of the two rows of first side electrodes that are retracted, and the second side lead Y1 of the second side electrodes of the two outermost rows, and the electrode direction of the outer electrode layer 4 is set to X
  • the number of the electrode array element 41 from left to right is X1, X2, X3 ⁇ Xn
  • the Y direction is connected to the ground electrode pulse
  • the X direction is connected to the positive electrode pulse
  • the combination of X and Y directions is wound on the back
  • the ultrasonic transducer has N+3 electrode leads, and the actual number of coded array elements is 3N.
  • the array elements when the array elements are manipulated by the positive electrode lead and the ground electrode lead, it can be controlled by Addressable excitation is performed on the rows and columns composed of X and Y directions to realize Y-direction near-field, mid-field, and far-field depth focusing and X-direction focus deflection, and obtain higher quality and more complete image information in medicine.
  • the lead method of row and column addressing can also solve the problem on the lead of the multi-element array.
  • a first matching layer, a second matching layer and an acoustic lens 6 are stacked on the outer periphery of the outer electrode layer 4 in order.
  • the matching layer 5 and the acoustic lens 6 can be arranged around the outer ring of the outer electrode layer 4 to meet the structural requirements of the ultrasonic transducer.
  • the stack structure can be based on the actual ultrasonic transducer. The structure is increased or decreased.
  • Fig. 5 is a schematic diagram of the arrangement structure of the ultrasonic endoscope system provided by the present invention
  • Fig. 6 is a schematic diagram of the end structure of the ring array ultrasonic transducer in Fig. 5.
  • the present invention also provides an ultrasonic endoscope system, including an endoscope ultrasonic excitation system 12, an optical imaging system 13, a display 51, and a puncture needle system 52.
  • the puncture needle system 52 includes an insertion portion 23 that can be inserted into the subject, a front hard portion 20, a bending portion 21, and a flexible tube portion 22 provided at the front end of the insertion portion 23, and a ring array ultrasonic transducer 201 is provided in the front end hard portion 20
  • the ring array ultrasonic transducer 201 is provided with the ultrasonic transducer as provided in the above-mentioned embodiment.
  • the end of the front end hard part 20 is provided with water jet holes 202, air jet holes 203, and puncture holes 204.
  • the light source 205 provides illumination for the optical camera 206.
  • the front end hard part 20 enters the subject, and the puncture needle 30 passes through the puncture hole. Stretch out inside 204 to take a biopsy sample.
  • the ultrasonic endoscope system adopts the ultrasonic transducer of the foregoing embodiment, please refer to the foregoing embodiment for the beneficial effects of the ultrasonic endoscope system brought about by the ultrasonic transducer.
  • the endoscopic ultrasound excitation system includes a secondary excitation system that separately excites the inner electrode layer and the outer electrode layer.
  • a secondary excitation system that separately excites the inner electrode layer and the outer electrode layer.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

L'invention concerne un transducteur à ultrasons et un système d'endoscope à ultrasons ; une tranche à ultrasons (2) du transducteur à ultrasons entoure la surface périphérique externe d'un bague de support agencée de manière annulaire (1) ; une couche d'électrode interne (3) est située sur la bague intérieure de la tranche à ultrasons (2) ; une impulsion électrique est appliquée pour exciter la surface interne de la tranche à ultrasons (2) ; une couche d'électrode externe (4) est située sur la surface périphérique externe de la tranche à ultrasons (2) ; la surface externe de la tranche à ultrasons (2) est excitée par application d'une impulsion électrique ; la direction d'électrode de la couche d'électrode interne (3) est disposée perpendiculairement à la direction d'électrode de la couche d'électrode externe (4) ; au moyen d'un changement de la position d'excitation de la couche d'électrode interne (3) et de la couche d'électrode externe (4) sur la tranche à ultrasons (2), le transducteur à ultrasons peut être ajusté dans la direction circonférentielle et la position de focalisation, ainsi l'imagerie du transducteur à ultrasons dans la zone de champ sonore est uniforme et cohérente.
PCT/CN2019/124336 2019-12-10 2019-12-10 Système d'endoscope à ultrasons et transducteur à ultrasons Ceased WO2021114097A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2019/124336 WO2021114097A1 (fr) 2019-12-10 2019-12-10 Système d'endoscope à ultrasons et transducteur à ultrasons

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PCT/CN2019/124336 WO2021114097A1 (fr) 2019-12-10 2019-12-10 Système d'endoscope à ultrasons et transducteur à ultrasons

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WO2021114097A1 true WO2021114097A1 (fr) 2021-06-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115219590A (zh) * 2022-07-11 2022-10-21 艾因蒂克科技(上海)有限公司 一种全方位检测管道的超声阵列组合探头

Citations (7)

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Publication number Priority date Publication date Assignee Title
US20060103265A1 (en) * 2004-11-12 2006-05-18 Fuji Photo Film Co., Ltd. Ultrasonic transducer array and method of manufacturing the same
CN104582586A (zh) * 2012-09-07 2015-04-29 奥林巴斯株式会社 超声波单元以及超声波内窥镜
CN106859700A (zh) * 2017-03-24 2017-06-20 汕头市超声仪器研究所有限公司 一种超声环形阵列换能器及其制作方法
CN108027436A (zh) * 2015-09-08 2018-05-11 达尔豪斯大学 结合相位阵列与使用延迟校正的菲涅尔子孔径的菲涅尔波带片波束成形的系统和方法
CN109431548A (zh) * 2018-12-14 2019-03-08 深圳先进技术研究院 超声波内镜系统
CN110235022A (zh) * 2016-12-15 2019-09-13 达尔豪斯大学 用于使用相干复合菲涅尔聚焦进行超声波束形成的系统和方法
CN110368032A (zh) * 2019-07-26 2019-10-25 深圳先进技术研究院 一种超声波内窥镜探头及超声波内窥镜系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060103265A1 (en) * 2004-11-12 2006-05-18 Fuji Photo Film Co., Ltd. Ultrasonic transducer array and method of manufacturing the same
CN104582586A (zh) * 2012-09-07 2015-04-29 奥林巴斯株式会社 超声波单元以及超声波内窥镜
CN108027436A (zh) * 2015-09-08 2018-05-11 达尔豪斯大学 结合相位阵列与使用延迟校正的菲涅尔子孔径的菲涅尔波带片波束成形的系统和方法
CN110235022A (zh) * 2016-12-15 2019-09-13 达尔豪斯大学 用于使用相干复合菲涅尔聚焦进行超声波束形成的系统和方法
CN106859700A (zh) * 2017-03-24 2017-06-20 汕头市超声仪器研究所有限公司 一种超声环形阵列换能器及其制作方法
CN109431548A (zh) * 2018-12-14 2019-03-08 深圳先进技术研究院 超声波内镜系统
CN110368032A (zh) * 2019-07-26 2019-10-25 深圳先进技术研究院 一种超声波内窥镜探头及超声波内窥镜系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115219590A (zh) * 2022-07-11 2022-10-21 艾因蒂克科技(上海)有限公司 一种全方位检测管道的超声阵列组合探头
CN115219590B (zh) * 2022-07-11 2023-08-08 艾因蒂克科技(上海)有限公司 一种全方位检测管道的超声阵列组合探头

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