WO2021129054A1 - Planar structure microwave ablation antenna based on pcb structure, and ablation needle - Google Patents
Planar structure microwave ablation antenna based on pcb structure, and ablation needleDownload PDFInfo
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- WO2021129054A1 WO2021129054A1PCT/CN2020/120576CN2020120576WWO2021129054A1WO 2021129054 A1WO2021129054 A1WO 2021129054A1CN 2020120576 WCN2020120576 WCN 2020120576WWO 2021129054 A1WO2021129054 A1WO 2021129054A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/183—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves characterised by the type of antenna
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
Definitions
- the inventionrelates to the field of microwave thermal ablation, in particular to a planar structure microwave ablation antenna and an ablation needle based on a PCB structure.
- Microwaveis a high-frequency electromagnetic wave, and the transmitted electromagnetic energy can be absorbed by human tissues and then quickly converted into a large amount of heat energy.
- the current designmainly focuses on microwave ablation antennas based on coaxial lines.
- the processing of microwave ablation antennas with coaxial line structureis complicated, requires high precision, and has low design freedom. It is difficult to modify the antenna, so most of them focus on Innovate on the external structure of the coaxial line.
- the present inventionprovides a planar structure microwave ablation antenna and ablation needle based on PCB structure.
- the present inventionhas simple processing, high precision, high design freedom, and the ablation area is closer to spherical.
- a microwave ablation antenna with a planar structure based on a PCB structurecomprising an ablation puncture head in a rectangular wedge structure and a needle bar in a cuboid structure.
- the bottom surface of the rectangular wedge structureis connected to one end of the cuboid structure, and the ablation puncture head and
- the outer surface of the needle shaftis metalized to form the metal layer on the upper surface of the ablation puncture head and the needle shaft, the metal layer on the lower surface of the ablation puncture head and the needle shaft, and the metal layers on both sides of the ablation puncture head and the needle shaft.
- the shape and size of the bottom surface of the rectangular wedge structureare the same as the cross-section of the rectangular parallelepiped structure.
- the ablation puncture headfurther includes a metal band
- the metal bandis triangular in shape, two sides of which are connected with the metal layers on both sides to form an inner and outer metal short circuit, and the bottom side of the triangle is located on the bottom surface of the ablation puncture head.
- the distance between the triangle and the upper surface metal layer and the lower surface metal layeris equal.
- the needle shaftfurther includes a metal strip, which is connected to the metal strip on the bottom surface of the ablation puncture head and is in the same plane.
- the needle baris provided with a plurality of slits, and by adjusting the shape and size of the slits, the microwave energy can be efficiently radiated from the slits.
- the metal stripsare connected in series with impedance matching branches.
- the gapis square or parallelogram.
- the metal stripis located in the middle of the metal layer on both sides of the needle bar.
- An ablation needlecomprising the planar structure microwave ablation antenna according to any one of claims 1-9.
- the present inventionis easy to process, has high precision, low cost and wide bandwidth
- the present inventionhas a high degree of freedom, a small diameter, and is easy to adjust the working frequency to conform to the ISM frequency band through the branch matching network;
- the ablation area produced by the present inventionhas smaller backward radiation and is closer to a spherical shape.
- FIG. 1is a schematic structural diagram of a microwave ablation antenna with a planar structure according to Embodiment 1 of the present invention
- Figure 2is a schematic diagram of the structure of the ablation puncture head of the present invention.
- Figure 3is a schematic view of the structure of the needle bar of the present invention.
- Figure 4is a diagram of the simulation results of S parameters in pig liver in Example 1 of the present invention.
- Embodiment 1 of the present inventionis a schematic diagram of temperature simulation of Embodiment 1 of the present invention.
- FIG. 6is a schematic structural diagram of a microwave ablation antenna with a planar structure according to Embodiment 2 of the present invention.
- FIG. 7is a structural diagram of the slit opened in Embodiment 2 of the present invention.
- FIG. 8is a diagram of S parameter simulation results of Embodiment 2 of the present invention.
- FIG. 9is a diagram of the 915MHz temperature simulation result of Embodiment 2 of the present invention.
- FIG. 10is a graph of the temperature simulation result of 2.45 GHz according to Embodiment 2 of the present invention.
- a PCB structure-based planar structure microwave ablation antennaincludes an ablation puncture head 1 in a rectangular wedge structure and a needle shaft 2 in a rectangular parallelepiped structure.
- the rectangular wedge structurehas an upper Surface, bottom surface, bottom surface and two side surfaces, the bottom surface of the ablation puncture head is connected with the left end surface of the cuboid, the present invention metalizes the outer surface of the microwave ablation antenna dielectric layer to form the upper surface metal layer of the ablation puncture head 8.
- the shape and size of the bottom surface of the rectangular wedge structureare the same as those of the left end surface of the rectangular parallelepiped structure, and are connected to the left end surface of the rectangular parallelepiped structure.
- the ablation puncture headhas a flat transmission line structure with three layers of metal metallized on both sides.
- the three layers of metalrefer to the upper surface metal layer, the lower surface metal layer, and the middle metal strip.
- the metal strip 5is triangular in shape, which is similar to this embodiment.
- the metal layer on the left surface and the metal layer on the right surfaceare connected to form an internal and external metal short circuit.
- the metal stripcan be located in the cavity of the ablation puncture head, or can be located on the surface metal layers on both sides, but the metal strip is connected to the upper surface metal layer and the lower surface.
- the distance between the surface metal layersis equal, so that the energy of the microwave ablation antenna is not radiated at the tip, and the ablation area is controlled to have sufficient mechanical strength and puncture force.
- the bottom side of the triangleis located on the bottom surface of the ablation puncture head.
- the needle baralso has a flat transmission line structure with three layers of metal metallized on both sides.
- the three layers of metalrefer to the upper surface metal layer, the lower surface metal layer and the metal strip.
- the metal strip 6has a rectangular structure. The strip is connected with the metal strip of the ablation puncture head, the metal strip and the triangular metal strip are on the same plane, and the distance between the metal strip and the upper and lower surface metal layers is equal.
- the metal strip on the bottom surfaceis connected with the metal strip, which makes it easy to adjust the resonance frequency of the antenna and conforms to the ISM frequency band used in medicine, industry and science.
- the present inventionhas a plurality of gaps that can be optimized in shape and size on the needle shaft of the rectangular parallelepiped structure.
- PCB technologyis used to manufacture a microwave ablation antenna with a planar transmission line structure in the 0.433 GHz frequency band.
- the ablation puncture head 1is a flat transmission line structure with three layers of metal metallized on both sides, in the shape of a rectangular wedge, the internal medium is Rogers 4350, the length is 3mm, and the bottom surface of the puncture head is connected to the needle shaft.
- the length and widthare both 1mm, the overall diameter of the puncture head is less than 1.5mm, the inner metal band is triangular, the base is 1mm long, the length is 3mm, and the thickness is 0.035mm.
- the needle baris a rectangular parallelepiped structure, the length and width of the cross section are both 1mm, the total length of the needle bar is 100mm, the internal medium is Rogers 4350, the width of the metal strip 6 is 0.36mm, and the thickness is 0.035mm.
- the tipis connected with the ablation puncture head 1, and the outside after the connection is metalized.
- the needle bar of the rectangular parallelepiped structurehas two square gaps, namely the first square gap 3 and the second square gap 4.
- Each gapis formed by the square gap of the upper surface metal layer and the lower surface metal layer. It is composed of a square gap, a square gap in the metal layer on the left surface, and a square gap in the metal layer on the right surface.
- the first square slit 3is opened at a distance of 1 mm from the connecting surface of the ablation puncture head and the needle shaft, and the length is 2.8 mm.
- a second square gap 4is opened, and the side length of the second square gap is 2.8 mm. Perform energy radiation ablation.
- An ablation needleis composed of the microwave ablation antenna of the first embodiment.
- Figure 4shows the S-parameter simulation results of the microwave ablation antenna of Example 1 in the liver.
- the frequency bandis relatively wide, and the resonance frequency is about 0.433 GHz.
- the return lossreaches -45 dB.
- Fig. 5shows the simulation results of the CST temperature field of the microwave ablation antenna in the liver of Example 1.
- the poweris 20W
- the timeis 600s
- the dielectric constant of the liveris 43
- the initial temperatureis 37 degrees Celsius.
- the curve in Figure 5is an isotherm, where the area where the temperature is greater than 60 degrees Celsius is the area of microwave ablation, the long diameter of the ablation area is 66.5 mm, the short diameter is 47.2 mm, and the roundness reaches 0.71.
- a microwave ablation antenna with a planar transmission line structure in the 0.915 GHz and 2.45 GHz frequency bandsis manufactured using PCB technology.
- the internal medium of the ablation puncture headis Rogers 4350, the length is 3mm, the length and width of the connection are 1mm, the overall diameter is less than 1.5mm, the inner metal band 6 is triangular, the bottom side is 1mm long, and the length is 1mm. It is 3mm and the thickness is 0.035mm.
- Figure 7is a detailed structure diagram of the needle bar 2.
- the length and width of the cross sectionare 1mm, the total length is 100mm, the internal medium is Rogers 4003, the width of the metal strip 6 is 0.4mm, the thickness is 0.035mm, and the distance from the connecting surface is 5mm.
- the metal stripis connected in series with an impedance matching stub with a width of 0.9mm, and the length of the matching stub is 4mm.
- the metal strip of the present inventionis connected in series with an impedance matching stub 7, whose electrical length is related to the wavelength of the antenna resonance frequency.
- the metal stripis connected in series with the impedance matching stub to match the impedance of the microwave ablation antenna to the transmission line.
- a rectangular parallelepipedhas several slots with an optimized shape and size. By optimizing the shape and size of the slots, the microwave energy can be efficiently radiated from the slots.
- the shape of the slot in this embodimentis a parallelogram, and the number is 5.
- the parallelogram slot in this embodimentis composed of the parallelogram of the metal layer on the upper surface of the needle bar, the parallelogram of the metal layer on the lower surface, Rectangular structure of metal layers on the left and right surfaces.
- An ablation needleis composed of the microwave ablation antenna of the second embodiment.
- Figure 8shows the S parameter simulation results of the microwave ablation antenna in the liver of Example 2.
- the resonance frequencyis 0.915GHz and 2.45GHz, within the specified ISM frequency range, and the bandwidth is wide, reaching about 140%, echoing at the resonance point The loss reached -34dB and -32dB respectively.
- Figures 9 and 10are the simulation results of the CST temperature field of the microwave ablation antenna in the liver of Example 2.
- the poweris 20W
- the timeis 600s
- the dielectric constant of the liveris 43
- the initial temperatureis 37 degrees Celsius.
- the curveis the isotherm
- the area greater than 60 degrees Celsiusis the area of microwave ablation.
- the long diameter of the 915MHz ablation areais 50mm
- the short diameteris 39.6mm
- the axial ratiois 0.792
- the long diameter of the 2.45GHz ablation areais 54mm.
- the short diameteris 39mm
- the roundnessreaches 0.722.
- the planar structure microwave ablation antenna based on PCB structure of the present inventionis easy to process, high in accuracy, high in design freedom, small in diameter, wide in bandwidth, and resonates at 0.433GHz, 0.915GHz or 2.45 specified by ISM.
- GHzthe microwave energy transmission consumes low, effectively suppresses the backward radiation along the outer metal layer, and the ablation range is spherical.
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Abstract
Description
Translated fromChinese本发明涉及微波热消融领域，具体涉及一种基于PCB结构的平面结构微波消融天线及消融针。The invention relates to the field of microwave thermal ablation, in particular to a planar structure microwave ablation antenna and an ablation needle based on a PCB structure.
随着微创技术的发展，微波消融技术逐步得到了认可和广泛的应用，微波是一种高频电磁波，传递的电磁能可以被人体组织吸收，进而快速转化为大量热能。With the development of minimally invasive technology, microwave ablation technology has gradually been recognized and widely used. Microwave is a high-frequency electromagnetic wave, and the transmitted electromagnetic energy can be absorbed by human tissues and then quickly converted into a large amount of heat energy.
目前的设计主要聚焦于以同轴线为基础的微波消融天线，但是同轴线结构的微波消融天线加工复杂，精度要求高，且设计自由度低，难以在天线上进行改造，因此大多集中在同轴线的外部结构上进行创新。The current design mainly focuses on microwave ablation antennas based on coaxial lines. However, the processing of microwave ablation antennas with coaxial line structure is complicated, requires high precision, and has low design freedom. It is difficult to modify the antenna, so most of them focus on Innovate on the external structure of the coaxial line.
发明内容Summary of the invention
为了克服现有技术存在的缺点与不足，本发明提供一种基于PCB结构的平面结构微波消融天线及消融针，本发明加工简单、精度高、有很高的设计自由度且消融区域更接近于球形。In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a planar structure microwave ablation antenna and ablation needle based on PCB structure. The present invention has simple processing, high precision, high design freedom, and the ablation area is closer to spherical.
本发明采用如下技术方案：The present invention adopts the following technical solutions:
一种基于PCB结构的平面结构微波消融天线，包括呈矩形劈尖结构的消融穿刺头和呈长方体结构的针杆，所述矩形劈尖结构的底面与长方体结构的一端连接，对消融穿刺头及针杆的外表面进行金属化，形成消融穿刺头及针杆的上表面金属层、消融穿刺头及针杆的下表面金属层和消融穿刺头及针杆的两侧表面金属层。A microwave ablation antenna with a planar structure based on a PCB structure, comprising an ablation puncture head in a rectangular wedge structure and a needle bar in a cuboid structure. The bottom surface of the rectangular wedge structure is connected to one end of the cuboid structure, and the ablation puncture head and The outer surface of the needle shaft is metalized to form the metal layer on the upper surface of the ablation puncture head and the needle shaft, the metal layer on the lower surface of the ablation puncture head and the needle shaft, and the metal layers on both sides of the ablation puncture head and the needle shaft.
优选的，所述矩形劈尖结构的底面形状及尺寸均与长方体结构的横截面相同。Preferably, the shape and size of the bottom surface of the rectangular wedge structure are the same as the cross-section of the rectangular parallelepiped structure.
优选的，所述消融穿刺头还包括金属带，所述金属带呈三角形，其中两条边与两侧表面金属层相连接，形成内外金属短路，三角形的底边位于消融穿刺头的底面。Preferably, the ablation puncture head further includes a metal band, the metal band is triangular in shape, two sides of which are connected with the metal layers on both sides to form an inner and outer metal short circuit, and the bottom side of the triangle is located on the bottom surface of the ablation puncture head.
优选的，所述三角形与上表面金属层及下表面金属层的距离相等。Preferably, the distance between the triangle and the upper surface metal layer and the lower surface metal layer is equal.
优选的，所述针杆还包括金属条，所述金属条与消融穿刺头的底面金属带 连接，且处于同一平面。Preferably, the needle shaft further includes a metal strip, which is connected to the metal strip on the bottom surface of the ablation puncture head and is in the same plane.
优选的，所述针杆上开有多个缝隙，通过对缝隙形状和大小进行调节，使微波能量从缝隙处高效辐射。Preferably, the needle bar is provided with a plurality of slits, and by adjusting the shape and size of the slits, the microwave energy can be efficiently radiated from the slits.
优选的，所述金属条串接阻抗匹配枝节。Preferably, the metal strips are connected in series with impedance matching branches.
优选的，所述缝隙为方形或平行四边形。Preferably, the gap is square or parallelogram.
优选的，所述金属条位于针杆两侧表面金属层的中间位置。Preferably, the metal strip is located in the middle of the metal layer on both sides of the needle bar.
一种消融针，包括权利要求1-9任一项所述的平面结构微波消融天线。An ablation needle comprising the planar structure microwave ablation antenna according to any one of claims 1-9.
本发明的有益效果：The beneficial effects of the present invention:
(1)本发明易于加工，精度高，成本较低且带宽较宽；(1) The present invention is easy to process, has high precision, low cost and wide bandwidth;
(2)本发明自由度高，直径小，易于通过枝节匹配网络调节工作频率符合ISM的频段；(2) The present invention has a high degree of freedom, a small diameter, and is easy to adjust the working frequency to conform to the ISM frequency band through the branch matching network;
(3)本发明产生的消融区域相对于同轴线结构的消融天线后向辐射较小，且更接近于球形。(3) Compared with the ablation antenna of the coaxial structure, the ablation area produced by the present invention has smaller backward radiation and is closer to a spherical shape.
图1是本发明实施例1一种平面结构微波消融天线的结构示意图；1 is a schematic structural diagram of a microwave ablation antenna with a planar structure according to
图2是本发明消融穿刺头的结构示意图；Figure 2 is a schematic diagram of the structure of the ablation puncture head of the present invention;
图3是本发明针杆的结构示意图；Figure 3 is a schematic view of the structure of the needle bar of the present invention;
图4是本发明实施例1在猪肝脏中的S参数仿真结果图；Figure 4 is a diagram of the simulation results of S parameters in pig liver in Example 1 of the present invention;
图5是本发明实施例1的温度仿真示意图；5 is a schematic diagram of temperature simulation of
图6是本发明实施例2一种平面结构微波消融天线的结构示意图；6 is a schematic structural diagram of a microwave ablation antenna with a planar structure according to
图7为本发明实施例2所开的缝隙结构图；FIG. 7 is a structural diagram of the slit opened in
图8为本发明实施例2的S参数仿真结果图；FIG. 8 is a diagram of S parameter simulation results of
图9为本发明实施例2的915MHz温度仿真结果图；FIG. 9 is a diagram of the 915MHz temperature simulation result of
图10为本发明实施例2的2.45GHz温度仿真结果图。FIG. 10 is a graph of the temperature simulation result of 2.45 GHz according to
下面结合实施例及附图，对本发明作进一步地详细说明，但本发明的实施方式不限于此。Hereinafter, the present invention will be further described in detail with reference to the examples and drawings, but the implementation of the present invention is not limited to this.
实施例1Example 1
如图1、图2及图3所示，一种基于PCB结构的平面结构微波消融天线，包括呈矩形劈尖结构的消融穿刺头1和呈长方体结构的针杆2，矩形劈尖结构具有上表面、下表面、底面及两个侧面，所述消融穿刺头的底面与长方体的左侧端 面连接，本发明对微波消融天线介质层的外表面进行金属化，形成消融穿刺头的上表面金属层8、下表面金属层9及两侧表面金属层10、11；和针杆的上表面金属层12、针杆的下表面金属层13和针杆的两侧表面金属层14、15。As shown in Figure 1, Figure 2 and Figure 3, a PCB structure-based planar structure microwave ablation antenna includes an
本实施例中，所述矩形劈尖结构的底面形状及尺寸均与长方体结构的左端面的形状及尺寸相同，且与长方体结构的左端面连接。In this embodiment, the shape and size of the bottom surface of the rectangular wedge structure are the same as those of the left end surface of the rectangular parallelepiped structure, and are connected to the left end surface of the rectangular parallelepiped structure.
所述消融穿刺头具有两侧金属化的三层金属的平面传输线结构，三层金属是指上表面金属层及下表面金属层及中间金属带，所述金属带5呈三角形，与本实施例中的左表面金属层和右表面金属层连接，形成内外金属短路，所述金属带可以位于消融穿刺头的腔内，也可以位于两侧表面金属层，但是金属带与上表面金属层及下表面金属层的距离相等，使得微波消融天线的能量不在尖端进行辐射，控制消融区域，具有足够的机械强度与穿刺力。并且三角形的底边位于消融穿刺头的底面。The ablation puncture head has a flat transmission line structure with three layers of metal metallized on both sides. The three layers of metal refer to the upper surface metal layer, the lower surface metal layer, and the middle metal strip. The
所述针杆同样具有两侧金属化的三层金属的平面传输线结构，三层金属是指上表面金属层及下表面金属层及金属条，本实施例中，金属条6为矩形结构，金属条与消融穿刺头的金属带连接，金属条与三角形金属带在一个平面上，金属条与上、下表面金属层的距离相等。The needle bar also has a flat transmission line structure with three layers of metal metallized on both sides. The three layers of metal refer to the upper surface metal layer, the lower surface metal layer and the metal strip. In this embodiment, the metal strip 6 has a rectangular structure. The strip is connected with the metal strip of the ablation puncture head, the metal strip and the triangular metal strip are on the same plane, and the distance between the metal strip and the upper and lower surface metal layers is equal.
本发明中位于底面的金属带与金属条连接，易于调节天线的谐振频率，符合用于医学、工业和科学的ISM频段。In the present invention, the metal strip on the bottom surface is connected with the metal strip, which makes it easy to adjust the resonance frequency of the antenna and conforms to the ISM frequency band used in medicine, industry and science.
为了使得微波能量从缝隙处高效辐射，进行目标物体的消融，本发明在长方体结构的针杆上开有多个形状和大小可优化的缝隙。In order to efficiently radiate microwave energy from the gap and perform the ablation of the target object, the present invention has a plurality of gaps that can be optimized in shape and size on the needle shaft of the rectangular parallelepiped structure.
本实施例采用PCB技术制造在0.433GHz频段内平面传输线结构的微波消融天线。In this embodiment, PCB technology is used to manufacture a microwave ablation antenna with a planar transmission line structure in the 0.433 GHz frequency band.
如图1所示，消融穿刺头1为具有两侧金属化的三层金属的平面传输线结构，呈矩形劈尖状，内部介质为Rogers 4350，长度为3mm，穿刺头底面与针杆连接面的长宽均为1mm，穿刺头整体直径小于1.5mm，内部的金属带呈三角形，底边长1mm，长为3mm，厚度为0.035mm。As shown in Figure 1, the
如图3所示，针杆为长方体结构，横截面的长宽均为1mm，针杆的总长度为100mm，内部的介质为Rogers 4350，金属条6的宽度为0.36mm，厚度为0.035mm，顶端与消融穿刺头1相接，相接后的外部均进行金属化。As shown in Figure 3, the needle bar is a rectangular parallelepiped structure, the length and width of the cross section are both 1mm, the total length of the needle bar is 100mm, the internal medium is Rogers 4350, the width of the metal strip 6 is 0.36mm, and the thickness is 0.035mm. The tip is connected with the
本实施例中长方体结构的针杆开有两个方形缝隙，分别为第一方形缝隙3及第二方形缝隙4，每个缝隙均是由上表面金属层的方形缝隙、下表面金属层的方形缝隙、左表面金属层的方形缝隙及右表面金属层的方形缝隙构成。In this embodiment, the needle bar of the rectangular parallelepiped structure has two square gaps, namely the first
其中第一方形缝隙3开在距离消融穿刺头与针杆连接面的1mm处，长度为2.8mm。The first
然后再距离该第一方形缝隙1.3mm处，开有第二方形缝隙4，第二方形缝隙的边长为2.8mm。进行能量的辐射消融。Then, at a distance of 1.3 mm from the first square gap, a second
一种消融针，由本实施例1的微波消融天线构成。An ablation needle is composed of the microwave ablation antenna of the first embodiment.
图4所示为实施例1微波消融天线在肝脏中的S参数仿真结果，频带较宽，谐振频率大约在0.433GHz，在规定的ISM频段内，回波损耗达到-45dB。Figure 4 shows the S-parameter simulation results of the microwave ablation antenna of Example 1 in the liver. The frequency band is relatively wide, and the resonance frequency is about 0.433 GHz. In the specified ISM frequency band, the return loss reaches -45 dB.
图5所示为实施例1微波消融天线在肝脏中的CST温度场仿真结果图，功率为20W，时间为600s，肝脏的介电常数为43，初始温度为37摄氏度。图5中的曲线为等温线，其中温度大于60摄氏度的区域为微波消融的区域，消融区域的长径为66.5mm，短径为47.2mm，圆度达到0.71。Fig. 5 shows the simulation results of the CST temperature field of the microwave ablation antenna in the liver of Example 1. The power is 20W, the time is 600s, the dielectric constant of the liver is 43, and the initial temperature is 37 degrees Celsius. The curve in Figure 5 is an isotherm, where the area where the temperature is greater than 60 degrees Celsius is the area of microwave ablation, the long diameter of the ablation area is 66.5 mm, the short diameter is 47.2 mm, and the roundness reaches 0.71.
实施例2Example 2
本实施例以PCB技术制造在0.915GHz和2.45GHz频段内平面传输线结构的微波消融天线。In this embodiment, a microwave ablation antenna with a planar transmission line structure in the 0.915 GHz and 2.45 GHz frequency bands is manufactured using PCB technology.
包括消融穿刺头和针杆，消融穿刺头内部介质为Rogers 4350，长度为3mm，连接处的长宽均为1mm，整体直径小于1.5mm，内部的金属带6呈三角形，底边长1mm，长为3mm，厚度为0.035mm。Including the ablation puncture head and the needle shaft, the internal medium of the ablation puncture head is Rogers 4350, the length is 3mm, the length and width of the connection are 1mm, the overall diameter is less than 1.5mm, the inner metal band 6 is triangular, the bottom side is 1mm long, and the length is 1mm. It is 3mm and the thickness is 0.035mm.
图7为针杆2的详细结构图，横截面的长宽均为1mm，总长度为100mm，内部的介质为Rogers 4003,金属条6宽度为0.4mm，厚度为0.035mm，在距离连接面5mm处，金属条串联一个宽度为0.9mm的阻抗匹配枝节，匹配枝节的长度为4mm，如图6所示，本发明金属条串联一个阻抗匹配枝节7，其电长度与天线谐振频率的波长有关，金属条串接阻抗匹配枝节，可以使微波消融天线的阻抗与传输线匹配。Figure 7 is a detailed structure diagram of the
为了让微波消融天线辐射微波进行消融，在长方体开有数个形状和大小可优化的缝隙，通过对缝隙的形状和大小进行优化，可以使得微波能量从缝隙处高效辐射。如图7所示，本实施例的缝隙形状为平行四边形，个数为5个，本实施例中的平行四边形缝隙是由针杆上表面金属层的平行四边形、下表面金属层的平行四边形、左右表面金属层的矩形构成。In order to allow the microwave ablation antenna to radiate microwaves for ablation, a rectangular parallelepiped has several slots with an optimized shape and size. By optimizing the shape and size of the slots, the microwave energy can be efficiently radiated from the slots. As shown in Figure 7, the shape of the slot in this embodiment is a parallelogram, and the number is 5. The parallelogram slot in this embodiment is composed of the parallelogram of the metal layer on the upper surface of the needle bar, the parallelogram of the metal layer on the lower surface, Rectangular structure of metal layers on the left and right surfaces.
距离消融穿刺头与针杆的连接处的上表面金属层1.1mm处，开有底边0.2mm，上下边横向距离为0.22mm，间距为0.44mm的5个平行四边形缝隙，A distance of 1.1mm from the upper surface of the metal layer where the ablation puncture head and the needle bar are connected, with a bottom edge of 0.2mm, a lateral distance of 0.22mm between the upper and lower sides, and 5 parallelogram gaps with a spacing of 0.44mm.
距离消融穿刺头与针杆的连接处的下表面金属层9连接处后方1.32mm处，开有底边0.2mm，上下边横向距离为0.22mm，间距为0.44mm的5个平行四边形缝隙 16，1.32mm behind the connection of the lower surface of the metal layer 9 where the ablation puncture head and the needle bar are connected, there is a bottom edge of 0.2mm, a lateral distance of 0.22mm between the upper and lower sides, and 5 parallelogram gaps with a spacing of 0.44
在距离消融穿刺头与针杆的连接处的左表面金属层10连接处后方1.32mm处，开有缝隙宽度为0.2mm，距离为0.4mm的5个缝隙。At a distance 1.32 mm behind the connection of the left
在距离消融穿刺头与针杆的连接处的右表面金属层11连接处后方1.54mm处，开有缝隙宽度为0.2mm，距离为0.4mm的5个矩形缝隙，表面间的缝隙首尾相互连接，微波从缝隙处高效辐射，进行消融。At a distance of 1.54mm behind the connection of the
一种消融针，由本实施例2的微波消融天线构成。An ablation needle is composed of the microwave ablation antenna of the second embodiment.
本实施例2的其他特征与实施例1相同。The other features of the second embodiment are the same as those of the first embodiment.
图8为实施例2微波消融天线在肝脏中的S参数仿真结果，谐振频率在0.915GHz和2.45GHz，在规定的ISM频率范围内，且带宽宽，达到大约140％，在谐振点处回波损耗分别达到-34dB和-32dB。Figure 8 shows the S parameter simulation results of the microwave ablation antenna in the liver of Example 2. The resonance frequency is 0.915GHz and 2.45GHz, within the specified ISM frequency range, and the bandwidth is wide, reaching about 140%, echoing at the resonance point The loss reached -34dB and -32dB respectively.
图9、图10为实施例2微波消融天线在肝脏中的CST温度场仿真结果图，功率为20W，时间为600s，肝脏的介电常数为43，初始温度为37摄氏度。其中曲线为等温线，其中大于60摄氏度的区域为微波消融的区域，915MHz消融区域的长径为50mm，短径为39.6mm，轴比为0.792,，2.45GHz的消融区域的长径为54mm，短径为39mm，圆度达到0.722。Figures 9 and 10 are the simulation results of the CST temperature field of the microwave ablation antenna in the liver of Example 2. The power is 20W, the time is 600s, the dielectric constant of the liver is 43, and the initial temperature is 37 degrees Celsius. The curve is the isotherm, and the area greater than 60 degrees Celsius is the area of microwave ablation. The long diameter of the 915MHz ablation area is 50mm, the short diameter is 39.6mm, the axial ratio is 0.792, and the long diameter of the 2.45GHz ablation area is 54mm. The short diameter is 39mm, and the roundness reaches 0.722.
综上所述，本发明的一种基于PCB结构的平面结构微波消融天线，易于加工，精度高，设计的自由度高，直径小，带宽宽，谐振于ISM规定的0.433GHz，0.915GHz或2.45GHz，微波能量传输消耗低，有效的抑制了沿外部金属层的后向辐射，消融范围呈球形。In summary, the planar structure microwave ablation antenna based on PCB structure of the present invention is easy to process, high in accuracy, high in design freedom, small in diameter, wide in bandwidth, and resonates at 0.433GHz, 0.915GHz or 2.45 specified by ISM. GHz, the microwave energy transmission consumes low, effectively suppresses the backward radiation along the outer metal layer, and the ablation range is spherical.
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受所述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the embodiments, and any other changes, modifications, substitutions, and combinations made without departing from the spirit and principle of the present invention , Simplification, should be equivalent replacement methods, and they are all included in the protection scope of the present invention.
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| CN201911353470.5ACN111012482B (en) | 2019-12-25 | 2019-12-25 | A planar structure microwave ablation antenna and ablation needle based on PCB structure |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6428504B1 (en)* | 2000-04-06 | 2002-08-06 | Varian Medical Systems, Inc. | Multipurpose template and needles for the delivery and monitoring of multiple minimally invasive therapies |
| US20090036883A1 (en)* | 2007-07-30 | 2009-02-05 | Robert Behnke | Electrosurgical systems and printed circuit boards for use therewith |
| CN202386782U (en)* | 2011-12-13 | 2012-08-22 | 南京理工大学 | Microwave thermal therapy antenna with coaxial aperture corrugated coil |
| CN105596079A (en)* | 2016-02-18 | 2016-05-25 | 赛诺微医疗科技(北京)有限公司 | Antenna component used for microwave ablation and microwave ablation needle adopting same |
| CN106109009A (en)* | 2016-06-13 | 2016-11-16 | 南京航空航天大学 | A kind of water-cooled microwave ablation needle using 433MHz frequency |
| CN107811702A (en)* | 2016-09-12 | 2018-03-20 | 韦伯斯特生物官能(以色列)有限公司 | ablation catheter with flexible printed circuit board |
| CN107970065A (en)* | 2016-10-25 | 2018-05-01 | 韦伯斯特生物官能(以色列)有限公司 | The catheter distal end made of plastic tube and flexible print wiring board |
| CN108209903A (en)* | 2016-12-13 | 2018-06-29 | 韦伯斯特生物官能(以色列)有限公司 | Conduit strip with embedded circuit element |
| CN108209986A (en)* | 2013-02-08 | 2018-06-29 | 阿库图森医疗有限公司 | Expandable catheter component with flexible printed circuit board |
| CN111012482A (en)* | 2019-12-25 | 2020-04-17 | 华南理工大学 | Planar structure microwave ablation antenna and ablation needle based on PCB structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2472012A (en)* | 2009-07-20 | 2011-01-26 | Microoncology Ltd | Microwave antenna with flat paddle shape |
| CN209377738U (en)* | 2018-11-20 | 2019-09-13 | 成都美创医疗科技股份有限公司 | A kind of plasma procedures electrode for mass puncture |
- 2019
- 2019-12-25CNCN201911353470.5Apatent/CN111012482B/enactiveActive
- 2020
- 2020-10-13WOPCT/CN2020/120576patent/WO2021129054A1/ennot_activeCeased
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6428504B1 (en)* | 2000-04-06 | 2002-08-06 | Varian Medical Systems, Inc. | Multipurpose template and needles for the delivery and monitoring of multiple minimally invasive therapies |
| US20090036883A1 (en)* | 2007-07-30 | 2009-02-05 | Robert Behnke | Electrosurgical systems and printed circuit boards for use therewith |
| CN202386782U (en)* | 2011-12-13 | 2012-08-22 | 南京理工大学 | Microwave thermal therapy antenna with coaxial aperture corrugated coil |
| CN108209986A (en)* | 2013-02-08 | 2018-06-29 | 阿库图森医疗有限公司 | Expandable catheter component with flexible printed circuit board |
| CN105596079A (en)* | 2016-02-18 | 2016-05-25 | 赛诺微医疗科技(北京)有限公司 | Antenna component used for microwave ablation and microwave ablation needle adopting same |
| CN106109009A (en)* | 2016-06-13 | 2016-11-16 | 南京航空航天大学 | A kind of water-cooled microwave ablation needle using 433MHz frequency |
| CN107811702A (en)* | 2016-09-12 | 2018-03-20 | 韦伯斯特生物官能(以色列)有限公司 | ablation catheter with flexible printed circuit board |
| CN107970065A (en)* | 2016-10-25 | 2018-05-01 | 韦伯斯特生物官能(以色列)有限公司 | The catheter distal end made of plastic tube and flexible print wiring board |
| CN108209903A (en)* | 2016-12-13 | 2018-06-29 | 韦伯斯特生物官能(以色列)有限公司 | Conduit strip with embedded circuit element |
| CN111012482A (en)* | 2019-12-25 | 2020-04-17 | 华南理工大学 | Planar structure microwave ablation antenna and ablation needle based on PCB structure |
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