CN106361295A - Optical and acoustic mixed imaging conduit - Google Patents

Optical and acoustic mixed imaging conduit Download PDF

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Publication number
CN106361295A
CN106361295A CN201611107642.7A CN201611107642A CN106361295A CN 106361295 A CN106361295 A CN 106361295A CN 201611107642 A CN201611107642 A CN 201611107642A CN 106361295 A CN106361295 A CN 106361295A
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China
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optical
layer
acoustic
probe
catheter
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CN201611107642.7A
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Chinese (zh)
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徐晨阳
赵旭升
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全景恒升(北京)科学技术有限公司
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Priority to CN201611107642.7A priority Critical patent/CN106361295A/en
Publication of CN106361295A publication Critical patent/CN106361295A/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/0059Detecting, measuring or recording for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082Detecting, measuring or recording for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0084Detecting, measuring or recording for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4483Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer

Abstract

The invention discloses an optical and acoustic mixed imaging conduit. The optical and acoustic mixed imaging conduit comprises a conduit sheath, a near-end connecting unit and a far-end rapid switching head. The near-end connecting unit is connected to a photoelectric connector; a conduit cavity is formed in the conduit sheath, a mixed probe and a driving spiral pipe are arranged inside the conduit cavity, and the driving spiral pipe moves a far end horizontally and rotates the far end inside the conduit cavity under driving of a driving motor; the mixed probe comprises a probe shell, an electroacoustic transducer and an optical element are arranged inside the probe shell, and an optical fiber and a wire are arranged inside the driving spiral pipe; the optical element and the electroacoustic transducer are arrayed on the axis of the probe shell, and the probe shell is further filled with glue; the electroacoustic transducer comprises a piezoelectric layer, a matching layer and a back lining layer, wherein the piezoelectric layer is made from piezoelectric materials, the upper end face of the piezoelectric layer is wrapped by the matching layer, and the back lining layer makes contact with the lower end face of the piezoelectric layer. The imaging conduit carries out scanning at a time, then an acoustic image and an optical image can be obtained, and therefore imaging efficiency is high; the mixed probe is compact in structural design, easy and convenient to produce and manufacture according to a technology and reliable in performance.

Description

一种光学和声学混合成像导管 An optical hybrid and acoustic imaging catheter

技术领域 FIELD

[0001] 本发明涉及混合成像领域,尤其涉及一种光学和声学混合探头。 [0001] The present invention relates to a hybrid imaging, and more particularly relates to an optical and acoustic probe hybrid. 背景技术 Background technique

[0002] 光学成像和声学成像在医学中的应用非常广泛,旋转扫描对某些人体部位比如消化道或者血管进行成像有特殊优点。 [0002] Application of optical imaging and acoustic imaging is widely used in medicine, rotary scanning of certain body parts such as the digestive tract or blood vessel imaging has particular advantages. 通过旋转扫描,可以制作体积非常小的探头,通过细长的导管进行成像。 By rotation scanning, you can produce a very small volume of the probe, imaged by an elongated catheter. 市面上目前有很多种成像导管,比较常用的有光学成像导管和声学成像导管,比如光学相干层析和血管内窥超声。 Currently on the market there are many imaging catheter, commonly used optical and acoustic imaging catheter imaging catheter, such as an optical coherence tomography endoscopic and intravascular ultrasound. 一般来说,光学成像具有高清晰度而低穿透深度的特征,而声学成像具有高穿透深度而低清晰度的特征,因此两者之间有一定的互补性。 In general, high definition optical imaging characteristics and low penetration depth, wherein the acoustic imaging with high resolution low penetration depth, so a certain degree of complementarity between the two. 在有些情况下,比如对一些细小管腔内复杂病变的诊断中,为了做出更准确的诊断,医生既需要用光学成像,也需要用声学成像。 In some cases, such as for diagnosis of a number of small lesions in the lumen of the complex, in order to make a more accurate diagnosis, physicians require both with optical imaging, also need to use acoustic imaging.

[0003] 在既需要用光学成像,也需要用声学成像的情况下,能够同时进行光学成像和声学成像的混合成像探头有着显而易见的优势。 [0003] In the case of both the need to use optical imaging, also need to use acoustic imaging can be performed while the imaging optical imaging and acoustic imaging probe hybrid has clear advantages. 然而对于类似冠状动脉,胆道,输卵管等细小管腔的成像时,混合探头的直径必须做的不能比单一功能的探头大太多,而且制造成本必须控制在可接受的范围内,这对探头制造工艺提出了特殊的挑战。 Similarly However, for coronary artery, bile duct, fallopian tubes and other small imaging lumen, the diameter of the mixing of the probe do not have too large than the single-function probe, and the manufacturing cost must be controlled within an acceptable range, which manufacture the probe process presents special challenges. 在这种情况下,有时甚至一根导线的取舍都会成为制约产品性能指标和决定产品是否容易制造的关键因素,因此对探头制造工艺的改进的需求从未中断。 In this case, sometimes a wire of choice will be the key factor restricting product performance and decide whether the product is easy to manufacture, so the need for improved manufacturing process of the probe has never been interrupted. 发明内容 SUMMARY

[0004] 本发明的目的是提供一种光学和声学混合成像导管。 [0004] The object of the present invention is to provide a hybrid optical and acoustic imaging catheter.

[0005] 为实现上述发明目的,本发明的技术方案是:一种光学和声学混合成像导管,包括导管鞘、近端连接单元、远端快速交换头;所述近端连接单元包括光电接头,导管鞘与近端连接单元连接,远端快速交换头设在导管鞘的末端;所述导管鞘内部为导管腔,导管腔内设有混合探头、驱动螺旋管,混合探头安装在驱动螺旋管的末端,驱动螺旋管带动混合探头在导管腔内平移和旋转;混合探头包括圆管型探头外壳,探头外壳一侧开有小孔,小孔内设有收发声学信号的电声换能器和收发光学信号的光学元件,驱动螺旋管内设有传导光学信号的光纤和传导电学信号的电线;所述光学元件、电声换能器沿远离驱动螺旋管的方向依次排列在探头外壳的轴线上, 探头外壳内还填充有胶水,固定光学元件和电声换能器;所述电声换能器包括压电层、匹配层、背衬层, [0005] In order to achieve the above object, the technical solution of the present invention is: an optical hybrid and acoustic imaging catheter, comprising a catheter sheath, the proximal end of the connecting unit, the distal end of a rapid exchange head; the proximal connector unit comprises a photoelectric linker, the proximal end of the catheter sheath and connecting unit, the distal end of the head provided in a rapid exchange catheter sheath; inner lumen of the catheter is a catheter sheath, catheter lumen with hybrid probes, drive coil, the drive coil in the probe is mounted mixed end of the tube, the driving coil to drive the mixing chamber of the probe in translation and rotation of the catheter; mixing tube type probe comprises a probe housing, the probe housing has a side opening aperture, orifice equipped with transceiving acoustic signals electro-acoustic transducer the optical element and an optical signal transceiver, equipped with a conductive coil drive signal of the optical fiber and the electrical signal conducting wire; said optical element, the electro-acoustic transducer in a direction away from the drive coil are arranged sequentially in the axis of the probe housing on the probe housing further filled with glue, fixing the optical element and the electro-acoustic transducer; said electro-acoustic transducer comprises a piezoelectric layer, a matching layer, a backing layer, 电层为压电材料,匹配层包裹压电层上端面,背衬层与压电层下端面接触。 A piezoelectric material layer, matching layer package on the end face of the piezoelectric layer, in contact with the lower end face of the backing layer and the piezoelectric layer.

[0006] 进一步,所述压电层上、下端面分别设有电极涂层,所述电线分别连接在两电极涂层。 [0006] Further, the piezoelectric layer, the lower end surface of the electrode coating are provided, the two wires are connected to the electrode coating.

[0007] 进一步,所述匹配层、背衬层含有导电介质,所述电线分别连接在上端面的匹配层和背衬层。 [0007] Further, the matching layer, the backing layer contains a conductive medium, the electric wires are connected to the end surface of the matching layer and the backing layer.

[0008] 进一步,所述压电层上端面设有电极涂层,背衬层含有导电介质,所述电线分别连接压电层上端面电极涂层和背衬层。 [0008] Further, the end surface electrodes provided on the piezoelectric layer coating, the backing layer contains a conductive medium, are connected to the wire electrode end surface and the backing layer coated on the piezoelectric layer.

[0009] 进一步,所述探头外壳内填充的胶水为导电胶,背衬层、匹配层含有导电介质,导电胶与匹配层没有电接触,导电胶与背衬层电接触,所述电线分别连接到匹配层和导电胶。 [0009] Further, in the probe housing is filled conductive adhesive glue, the backing layer, the matching layer comprising a conductive medium, the conductive adhesive layer is not in electrical contact with a mating conductive paste is electrically in contact with the backing layer, respectively connected to the wire matching layer and the conductive adhesive.

[0010] 进一步,所述探头外壳内填充的胶水为导电胶,所述压电层上端面设有电极涂层, 背衬层含有导电介质,导电胶与压电层上端面电极涂层没有电接触,导电胶与背衬层电接触,所述电线分别连接到压电层上端面电极涂层和胶水。 [0010] Further, in the probe housing is filled conductive adhesive glue, the end face is provided with electrode coatings on the piezoelectric layer, the backing layer contains a conductive medium, the conductive adhesive on the end face of the piezoelectric electrode layer coating is not electrically contacting, electrically conductive adhesive contacts the backing layer, the electric wires are connected to the end face the piezoelectric layer and the electrode coating glue.

[0011] 进一步,所述光学元件的发射的光波传播方向和电声换能器发射的声波传播方向之间的角度小于1〇°。 [0011] Further, the angle between the optical element and the direction of electric wave propagating acoustic emission transducer acoustic wave propagation direction is less than 1〇 emitted °.

[0012] 进一步,所述光学元件发射的光波传播方向、电声换能器发射的声波传播方向与导管轴的夹角分别为2°-10°。 [0012] Further, the direction of propagation of the light waves emitted by the optical element, the angle between the acoustic wave propagation direction of the catheter shaft electro-acoustic transducer are transmitted 2 ° -10 °.

[0013] 更进一步,所述背衬层含有能调节声阻抗并散射声波和改变电阻抗的钨粉和银粉。 [0013] Furthermore, the backing layer comprising adjustable acoustic scattering and acoustic impedance and changing the electrical impedance of tungsten powder and silver powder.

[0014] 本发明的有益效果是:本发明提供的成像导管一次扫描,即可获得声学图像和光学图像,成像效率高;混合探头的结构设计紧凑,生产制造工艺简捷,性能可靠。 [0014] Advantageous effects of the present invention are: the catheter of the present invention provides an imaging scan, to obtain an optical image and acoustic image, high imaging efficiency; hybrid probe design is compact, simple manufacturing process, reliable performance. 附图说明 BRIEF DESCRIPTION

[0015] 图1为本发明的结构示意图;图2为图1中I处局部放大图;图3为混合探头结构示意图。 [0015] FIG. 1 is a schematic structure of the present invention; FIG. 2 is a partially enlarged at I in FIG. 1; Figure 3 is a schematic configuration of a probe hybrid. 具体实施方式 Detailed ways

[0016] 下面将结合附图对本发明实施例中的技术方案进行清楚、完整地描述。 [0016] The following embodiments of the present invention in conjunction with the accompanying drawings of the solutions in the art will be clearly and completely described.

[0017] 如图1所示,一种光学和声学混合成像导管,包括导管鞘1、近端连接单元2、远端快速交换头3;所述近端连接单元2包括光电接头(图中未示出),导管鞘1与近端连接单元2连接,远端快速交换头3设在导管鞘1的末端。 [0017] As shown in FIG. 1, an optical hybrid and acoustic imaging catheter, comprising a catheter sheath, the proximal end of the connecting unit 2, the distal end of a rapid exchange head 3; the proximal connector 2 comprises a photoelectric cell linker (not shown), connected to the proximal end of the catheter sheath 1 unit 2 is connected to the distal end of a rapid exchange catheter head 3 is provided in the sheath 1. [〇〇18]如图2所示,所述导管鞘1内部为导管腔101,远端快速交换头3内部设有导丝腔301,导管腔101和导丝腔301不相通。 [〇〇18] 2, the interior of the catheter sheath a catheter lumen 101, the distal end of inner head 3 is provided a rapid exchange guidewire lumen 301, the catheter lumen 101 and guidewire lumen 301 does not communicate.

[0019] 如图2、3所示,导管腔101内设有混合探头4、驱动螺旋管6,混合探头4安装在驱动螺旋管6的末端,驱动螺旋管6带动混合探头4在导管腔101内平移和旋转。 [0019] 2 and 3, the catheter equipped with mixing chamber 101 of the probe 4, the drive coil 6, the probe 4 is mounted at the end of the mixing spiral 6 of the drive, the drive coil 6 to drive the probe 4 in the mixing duct translation and rotation within lumen 101.

[0020] 混合探头4包括圆管型探头外壳401,探头外壳401—般是金属,玻璃或者有机聚合物做成。 [0020] The probe 4 comprises a mixing tube type probe housing 401, the probe housing 401 is generally metallic, made of glass or an organic polymer. 探头外壳401—侧开有小孔402,小孔402内设有收发声学信号的电声换能器403和收发光学信号的光学元件404,驱动螺旋管6内设有传导光学信号的光纤601和传导电学信号的电线602。 Probe housing 401 side foraminous 402, orifice 402 equipped with an optical element transceiving acoustic signals electro-acoustic transducer 403 and a transceiver 404 of the optical signals, the drive coil 6 with a conductive features an optical fiber 601 and the signal electrical signal conducting wires 602. 电线可以是双绞线或者同轴电缆,放置在光纤旁边或者环绕光纤。 Twisted pair or coaxial cable wire may be placed next to or surrounding the optical fiber. 电线进入探头外壳后,放置在侧面或者底下以避开光学元件的光路。 After the wire into the probe housing, is placed on the side or bottom so as to avoid the optical path of the optical element.

[0021] 所述光学元件404、电声换能器403沿远离驱动螺旋管6的方向依次排列在探头外壳401的轴线上,探头外壳401内还填充有胶水405固定光学元件404和电声换能器403。 [0021] The optical element 404, the electro-acoustic transducer 403 in a direction away from the driving coil 6 are arranged sequentially on the axis 401 of the probe housing, it is also filled with glue 405 and fixing the optical element 404 in the probe housing electroacoustic transducer 401 transducer 403.

[0022] 由于混合探头4是放置在导管鞘1内的,而导管鞘1内壁的折射率和声阻抗不可能和周围介质完全相同,因此导管鞘1内壁自身往往产生反射,为了降低导管鞘1内壁的自身反射,将光学元件404的反射面反射的光波方向和电声换能器403的发射面与探头外壳401 的轴线是相交的,并具有一定的夹角,使得离开混合探头4的光束和声束与探头外壳轴线的垂直面不重合,这样可以有效降低自身反射。 [0022] Since the hybrid of the probe 4 is placed in the catheter sheath 1, and the refractive index of the acoustic impedance of the inner wall of the catheter sheath 1 and the surrounding medium could not identical, so the inner wall of the catheter sheath 1 itself tends to reflection, in order to reduce the introducer sheath 1 reflecting their inner walls, the direction of light waves reflecting surface of the optical element 404 and the reflection axis electroacoustic transducer emitting surface of the housing 403 of the probe 401 intersect, and has a certain angle, so that the beam 4 leaving the mixing probe vertical axis of the sound beam of the probe of the housing do not overlap, which can effectively reduce the reflection itself. 优选的夹角范围为2-10°,这样既可以有效降低自身反射,又可以防止偏角过大而对测量误差和后期处理造成麻烦。 The preferred angle range of 2-10 °, so that both can effectively reduce the reflection itself, but also to prevent problems caused by excessive angle measurement error and post-processing. 同时为了方便对准光学图像和声学图像,光学元件404的反射面反射的光波方向和电声换能器403的发射面发射的声波方向应该尽可能的指向同一目标位置。 In order to facilitate alignment of the optical image and acoustic image, the direction of the light wave reflected by the reflecting surface 404 of the optical element and the electro-acoustic transducer emitting acoustic waves emitted in the direction of the surface 403 should point to the same destination as possible. 当目标离探头的距离较远时,两者应该几乎平行。 When the target is far away from the probe, the two should be almost parallel. [〇〇23] 所述电声换能器403包括压电层4031、匹配层4032、背衬层4033,压电层4031为压电材料,压电材料受到压力作用会在两端面间出现电压,而且在两端面受到电压作用时可以产生压力。 [〇〇23] The electro-acoustic transducer 403 includes a piezoelectric layer 4031, 4032 matching layer, the backing layer 4033, 4031 is a piezoelectric material of the piezoelectric layer, the piezoelectric material will be subjected to pressure between the end faces voltage and when voltage is applied to both end faces may be subjected to a pressure. 因为压电材料本身往往并非电导体,为了达到最好的电场分布,压电材料两端一般需要加上电极。 Since the piezoelectric material itself is often not an electrical conductor, in order to achieve the best electric field distribution across the piezoelectric materials generally need to add electrodes. [〇〇24] 匹配层4032包裹压电层4031上端面,背衬层4033与压电层4031下端面接触。 [〇〇24] 4031 matching layer 4032 on the end surface wrapping piezoelectric layer, the backing layer 4033 contact with the lower end surface of the piezoelectric layer 4031.

[0025]由于混合导管的特殊用途,有时需要将探头做的较小,如探头外壳尺寸仅0.5mm, 这时探头的加工制作就非常困难,尤其是对电声换能器的电线的粘合。 [0025] Because of the special purpose of the mixing conduit, the probe may need to be made smaller, as the size of the probe housing only 0.5mm, the manufacture of the probe at this time is very difficult, especially for the electro-acoustic transducer bonded wires . 优化电声换能器电线的粘合方法,对电声换能器结构进行如下三种形式的优化。 Optimization method of electro-acoustic transducers bonding wires, three forms of electro-acoustic transducer optimized structure. [〇〇26] 电线连接方式1:所述压电层4031上、下端面分别设有电极涂层(图中未示出),电极涂层可以是蒸镀一薄层金属,也可以是涂上一层薄薄的导电胶,所述电线602分别连接在压电层4031上、下端面的电极涂层,构成电极涂层-压电层-电极涂层的电学回路。 [〇〇26] Cable Connection 1: the piezoelectric layer 4031, respectively, with the lower end surface electrode coatings (not shown), an electrode coating may be deposited a thin layer of metal, coating may be thin layer of conductive paste, the electric wires 602 are connected to the piezoelectric layer 4031, the lower end surface of the electrode coating, constituting the electrode coating - the piezoelectric layer - the electrical circuit of the electrode coating. [〇〇27] 电线连接方式2:所述匹配层4032以导电胶为原料,背衬层4033中加入能调节声阻抗并散射声波和改变电阻抗的钨粉和银粉,从而使匹配层4032、背衬层4033具备导电特效, 所述电线602分别连接在压电层4031上端面匹配层4032和背衬层4033,构成匹配层-压电层-背衬层的电学回路。 [〇〇27] Cable Connection 2: the matching layer 4032 is a conductive adhesive material, the backing layer 4033 can be added to adjust the acoustic impedance and acoustic scattering and changes in electrical impedance tungsten powder and silver powder, so that the matching layer 4032, 4033 includes a conductive backing layer effects, the electric wires 602 are connected to the end surface of the piezoelectric layer 4031 4032 matching layer and the backing layer 4033 constituting the matching layer - the piezoelectric layer - backing layer electrical circuit.

[0028]电线不需要直接连接到电极涂层,电声换能器的加工复杂度大大降低。 [0028] The wire coating need not be directly connected to the electrode, the electro-acoustic transducer and processing complexity is greatly reduced. [〇〇29]由于背衬层的主要功能是耗散压电层向发射方向的反方向发射的声波,调节换能器的Q值,以免形成伪影和拖尾和调节电声转化效率,其厚度相对于电极涂层较大,电线在粘合时的难度较小。 [〇〇29] Since the primary function of the backing layer of the piezoelectric layer is dissipative acoustic wave emitted in the opposite direction to the emission direction, adjustment of the Q value of the transducer, and avoid the formation of trailing artifacts and adjusting the electro-acoustic conversion efficiency, the thickness of the coating with respect to the electrode which was larger than the wire of the difficulty in bonding.

[0030]电线连接方式3:所述探头外壳401填充的胶水405直接采用导电胶,背衬层4033、 匹配层4032含有导电介质,导电胶与压电层不接触,导电胶与背衬层电接触,所述电线602 分别连接在压电层上端面的匹配层4032和胶水405,构成胶水-背衬层-压电层-匹配层的电学回路。 [0030] Cable Connection 3: 401 of the probe housing 405 is directly filled with conductive glue adhesive, the backing layer 4033, a conductive medium containing the matching layer 4032, the conductive adhesive is not in contact with the piezoelectric layer, the backing layer is electrically conductive adhesive contacting the wire 602 are connected to the piezoelectric layer 4032 and the end face of the matching layer 405 of glue, the glue constituting - backing - the piezoelectric layer - matching layer electrical circuit. [〇〇31] 此外,还可以设计成电极涂层-压电层_背衬层、电极涂层-压电层_背衬层_胶水的电学回路对应的电声换能器结构。 [〇〇31] In addition, electrode coatings may also be designed to - _ backing layer piezoelectric layers, electrode coating - a piezoelectric electro-acoustic backing layer _ _ glue electrical circuit corresponding transducer structure.

[0032] 所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。 Example [0032] The described embodiments are merely part of embodiments of the present invention rather than all embodiments. 基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

Claims (9)

1.一种光学和声学混合成像导管,其特征在于,包括导管鞘、近端连接单元、远端快速交换头;所述近端连接单元包括光电接头,导管鞘与近端连接单元连接,远端快速交换头设在导管鞘的末端;所述导管鞘内部为导管腔,导管腔内设有混合探头、驱动螺旋管,混合探头安装在驱动螺旋管的末端,驱动螺旋管带动混合探头在导管腔内平移和旋转;混合探头包括圆管型探头外壳,探头外壳一侧开有小孔,小孔内设有收发声学信号的电声换能器和收发光学信号的光学元件,驱动螺旋管内设有传导光学信号的光纤和传导电学信号的电线;所述光学元件、电声换能器沿远离驱动螺旋管的方向依次排列在探头外壳的轴线上, 探头外壳内还填充有胶水,固定光学元件和电声换能器;所述电声换能器包括压电层、匹配层、背衬层,压电层为压电材料,匹配层包裹压 An optical hybrid and acoustic imaging catheter, wherein the sheath includes a catheter, the proximal end of the connecting unit, the distal end of a rapid exchange head; the proximal connector unit comprises a photoelectric joint, the proximal end of the catheter sheath and connecting unit, away end of the head end of a rapid exchange catheter sheath disposed; inner lumen of the catheter is a catheter sheath, catheter lumen with hybrid probes, drive coil, the mixed probe mounted at the end of the driving coil, the driving coil to drive the probe mix translation and rotation in the lumen of the catheter; mixing tube type probe comprises a probe housing, the probe housing has a side opening aperture, orifice transceiver equipped with an electro-acoustic transducer an acoustic signal transducer and optical elements of the optical signal transceiver, driver equipped with a conductive coil of optical fiber and a signal wire conducting electrical signals; the optical element, the electro-acoustic transducer in the direction away from the drive coil are arranged sequentially on the axis of the probe housing, is also within the probe housing is filled with glue, fixing the optical element and the electro-acoustic transducer; said electro-acoustic transducer comprises a piezoelectric layer, a matching layer, a backing layer, the piezoelectric layer is a piezoelectric material matching layer package pressure 层上端面,背衬层与压电层下端面接触。 End surface layer, the backing layer is in contact with the end face of the piezoelectric layer.
2.根据权利要求1所述的光学和声学混合成像导管,其特征在于,所述压电层上、下端面分别设有电极涂层,所述电线分别连接在两电极涂层。 2. The optical hybrid and acoustic imaging catheter according to claim 1, wherein said piezoelectric layer, the lower end surface of the electrode coating are provided, the two wires are connected to the electrode coating.
3.根据权利要求1所述的光学和声学混合成像导管,其特征在于,所述匹配层、背衬层含有导电介质,所述电线分别连接匹配层和背衬层。 The optical and acoustic imaging catheter of claim 1 mixing claim, wherein the matching layer, the backing layer contains a conductive medium, the electric wires are connected to the matching layer and the backing layer.
4.根据权利要求1所述的光学和声学混合成像导管,其特征在于,所述压电层上端面设有电极涂层,背衬层含有导电介质,所述电线分别连接压电层上端面电极涂层和背衬层。 The optical and acoustic imaging catheter of claim 1 mixing claim, wherein said end surface is provided with electrode coatings on the piezoelectric layer, the backing layer contains a conductive medium, the electric wires are connected to the end face on the piezoelectric layer electrode coating and the backing layer.
5.根据权利要求1所述的光学和声学混合成像导管,其特征在于,所述探头外壳内填充的胶水为导电胶,背衬层、匹配层含有导电介质,导电胶与匹配层没有电接触,导电胶与背衬层电接触,所述电线分别连接到匹配层和胶水。 The optical and acoustic imaging catheter of claim 1 mixing claim, wherein, in said probe housing is filled conductive paste glue, the backing layer, the matching layer comprising a conductive medium, the conductive paste is not in electrical contact with the matching layer , electrically conductive adhesive contacts the backing layer, the electric wires are respectively connected to the matching layer and glue.
6.根据权利要求1所述的光学和声学混合成像导管,其特征在于,所述探头外壳内填充的胶水为导电胶,所述压电层上端面设有电极涂层,背衬层含有导电介质,导电胶与压电层上端面电极涂层没有电接触,导电胶与背衬层电接触,所述电线分别连接到压电层上端面电极涂层和导电胶。 The optical and acoustic imaging catheter of claim 1 mixing claim, wherein, in said probe housing is filled glue conductive paste, coating the end surface electrodes provided on the piezoelectric layer, the backing layer comprising a conductive end surface electrode on the dielectric coating, the conductive paste is not in electrical contact with the piezoelectric layer, the conductive paste is electrically in contact with the backing layer, the electric wires are connected to the end face the piezoelectric layer and the electrode coating conductive paste.
7.根据权利要求1至4任一所述的光学和声学混合成像导管,其特征在于,所述光学元件的发射的光波传播方向和电声换能器发射的声波传播方向之间的角度小于1〇°。 1 to 4 according to any one of the optical hybrid and acoustic imaging catheter of claim, wherein the angle between the acoustic wave propagating direction, and the emission of the acoustic wave propagation direction of the optical element is emitted from the transducer is less than 1〇 °.
8.根据权利要求5所述的光学和声学混合成像导管,其特征在于,所述光学元件发射的光波传播方向、电声换能器发射的声波传播方向与导管轴的夹角分别为2°_10°。 The optical and acoustic imaging catheter mixture according to claim 5, characterized in that the light wave propagation direction of the emitted optical element, the angle between the acoustic wave propagation direction of the catheter shaft electro-acoustic transducer are transmitted 2 ° _10 °.
9.根据权利要求3所述的光学和声学混合成像导管,其特征在于,所述背衬层含有能调节声阻抗并散射声波和改变电阻抗的钨粉和银粉。 9. The hybrid optical and acoustic imaging catheter according to claim 3, wherein said backing layer comprises scattering and acoustic impedance can be adjusted to change the electrical impedance of the sound waves and a tungsten powder and silver powder.
CN201611107642.7A 2016-12-06 2016-12-06 Optical and acoustic mixed imaging conduit CN106361295A (en)

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