WO2013017041A1 - Carotid artery coil - Google Patents

Carotid artery coil Download PDF

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Publication number
WO2013017041A1
WO2013017041A1 PCT/CN2012/079247 CN2012079247W WO2013017041A1 WO 2013017041 A1 WO2013017041 A1 WO 2013017041A1 CN 2012079247 W CN2012079247 W CN 2012079247W WO 2013017041 A1 WO2013017041 A1 WO 2013017041A1
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Prior art keywords
coil
carotid artery
parallel
units
noise ratio
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PCT/CN2012/079247
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French (fr)
Chinese (zh)
Inventor
罗伟平
刘新
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苏州众志医疗科技有限公司
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Publication of WO2013017041A1 publication Critical patent/WO2013017041A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3678—Electrical details, e.g. matching or coupling of the coil to the receiver involving quadrature drive or detection, e.g. a circularly polarized RF magnetic field

Definitions

  • the invention belongs to the field of magnetic resonance imaging, and in particular relates to a carotid artery fistula.
  • carotid iliac crests are usually made with smaller coil elements, because in general, although the small cymbals are not deeply penetrated, they can be placed close to the cymbal attachment. Can have a high signal to noise ratio, but also have a high resolution.
  • the carotid artery is just close to the neck surface, so a small surface line is the primary choice for carotid imaging. Because carotid imaging requires high signal-to-noise ratio (SNR) and resolution (Resolution), it has a certain novelty and difficulty. At present, there are few clinical applications and actual products in this field.
  • the most important 2 x 2 elements of the carotid artery fistula are composed of two parts, left and right (left and right around the neck), each part consisting of two elements, as shown in Figure 1 and Figure 2. .
  • the shape and size of the online ⁇ are fixed, the more the number of cells of the ideal array ⁇ , the higher the signal-to-noise ratio of the image near the antenna, but the image in the radial direction. The worse the uniformity and penetration.
  • the object of the present invention is to provide a carotid artery fistula with high uniformity and penetrating power and high signal to noise ratio.
  • a carotid artery fistula comprising a coil unit, wherein at least three coil units of the coil unit are arranged in parallel.
  • the coil includes three parallel array units and at least across the three parallel arrays A cross-over unit in one of the turns unit.
  • the three parallel arranged coil units have the same area.
  • the three parallel arranged coil units are rectangular.
  • cross-line unit straddles the three parallel-array units.
  • cross-line unit is 8-shaped.
  • the three parallel-array coil units in the coil have a good balance between signal-to-noise ratio and penetration.
  • the arrangement of the other three parallel arrangement of the line unit can make the IPAT (parallel data collection) technology of the magnetic resonance more fully utilized, and the IPAT effect is obviously superior to the currently commercially available 2-channel line.
  • the structure of the cross-line turns is symmetric with the three parallel-arranged turns, which can achieve good decoupling without any decoupling measures, and can be effective without affecting other units.
  • the image signal-to-noise ratio and uniformity of the turns are increased.
  • Figure 1 is a practical circuit diagram of a conventional carotid artery fistula
  • FIG. 2 is a distribution diagram of a conventional carotid artery iliac crest unit
  • Figure 3 is a distribution diagram of a conventional carotid artery iliac crest unit
  • Figure 4 is a distribution diagram of the carotid artery iliac crest unit of the present invention.
  • Figure 5 is a test chart of the signal-to-noise ratio of the existing carotid artery iliac crest
  • Figure 6 is a test chart of the signal-to-noise ratio of the existing carotid artery iliac crest
  • Fig. 7 is a test chart of the signal to noise ratio of the carotid artery iliac crest of the present invention.
  • the carotid artery fistula of the present invention comprises two turns of a wire loop, each of which has four turns of elements.
  • the structure of each part is shown in Figure 4.
  • This line has 4 line elements, three of which are arranged in parallel, and the other line is arranged in 3 Parallelly arranged on the line unit, and into a unit of "8" words.
  • the four line units of each line are 3+1 structures, that is, three parallel line units (loops) +1 cross line units (saddle 3 parallel line units (loop) Arranged from left to right (in the direction of the human body from front to back), plus a cross-sag unit (saddle), spanning three parallel-arranged loop units (loops).
  • the three parallel-arranged turns (loops) in the line have a good balance between signal-to-noise ratio and penetration.
  • the arrangement of the other three parallel arranged loop units (Loop) allows the magnetic resonance IPAT (parallel gather) technology to be fully utilized, and the IPAT effect is significantly better than the current commercial 2-channel line.
  • the structure of the Saddle is symmetrical with the three parallel-connected loops. It can be decoupled without any decoupling and can effectively increase the line. ⁇ Image signal to noise ratio and uniformity.
  • the 3+1 line structure in this embodiment refers to three parallel line units (Loop) +1 cross line units (saddle), and another cross line unit (saddle) and three parallels.
  • the arranged loop units are all symmetrical to facilitate decoupling between the line unit (saddle) and the three parallel line units (loops).
  • the three parallel arranged loop units (Loops) can be of different sizes, and the saddle can span no more than three line units, and can only span some of the line units.
  • the present invention can be implemented.
  • the present invention can also be implemented if a structure of more than 4 coil units is used, and 4 of the units have the above 3+1 structure.
  • the coil design of the invention improves the uniformity and penetration of the turns well on the basis of improving the signal-to-noise ratio of the turns.
  • considering the position and size of the baby's heart there is a certain similarity with the carotid artery of the adult.
  • this line can also be used as a cardiac imaging for the baby, and it will also have a good effect.

Abstract

Disclosed is a carotid artery coil. The carotid artery coil comprises a coil unit. The coil unit comprises at least three coil units (1) arranged in parallel. The three coil units (1) arranged in parallel are provided with a great balance between signal-to-noise ratio and penetration. One saddle-shaped or otherwise referred to as an 8-shaped coil unit (2) can be added to the coil. The saddle-shaped coil unit (2) effectively improves image signal-to-noise ratio and uniformity of the coil under the premise of not affecting other units. The signal-to-noise ratio, uniformity, and IPAD effect of the carotid artery coil are significantly greater than that of commercially available two-channel coils.

Description

一种颈动脉线圈  Carotid coil
技术领域 Technical field
本发明属于磁共振成像领域， 具体涉及一种颈动脉线圏。  The invention belongs to the field of magnetic resonance imaging, and in particular relates to a carotid artery fistula.
背景技术 Background technique
中风历来是人类死亡的主要原因之一。 新的医学研究表明， 磁共振成像技术是目前识 别颈动脉中潜在危险脂斑的最有效的医学手段， 可以帮助发现有中风危险的人。 因此 MRI 磁共振颈动脉成像对颈动脉疾病的临床诊断， 疗效跟踪是一项非常有吸引力的技术， 并有 助于研制新型减脂斑药物。 但是颈动脉成像也具有较高的难度， 为了能较好地分辨血管， 管壁和斑块的形状和成分， 临床图像除了需要足够高的信噪比外， 还应具有亚毫米级的高 分辨率。 为此， 颈动脉线圏通常釆用较小的线圏单元（coil element )制作而成， 因为一般 而言， 虽然小的线圏穿透力不够深， 但它们能在靠近线圏附件的地方能有较高的信噪比， 还能有很高的分辨率。 而颈动脉正好是离脖子表面很近， 所以小的表面线圏是颈动脉成像 的首要选择。 由于颈动脉成像需要很高的信噪比 （SNR )和分辨率 （Resolution ), 具有一 定的新颖性和难度， 目前在这方面的临床应用和实际的产品还很少。 现在商用上最主要的 2 x 2单元（elements )颈动脉线圏由左右 （指脖子左右） 两部分组成， 每一个部分由两个 线圏单元（element )组成， 如图 1、 图 2所示。 为了提高信噪比， 依照经典的设计思路， 在线圏的形状和大小一定的情况下， 理想阵列线圏的单元数目越多， 靠近天线的图像信噪 比就越高，但径向方向的图像均匀性和穿透力就越差。现在还有一种 2 x 4单元（ elements ) 的线圏设计， 这个设计也分为两个左右两个部分， 每部分有四个单元（elements ), 每部分 的线圏单元如图 2所示。 但经过试验后发现， 虽然它在血管附件的图像信噪比高于前者， 但均匀性和穿透力明显不如图 1的 2 X 2 ( elements )的线圏高， 临床效果总体上不如前者。  Stroke has always been one of the main causes of human death. New medical research has shown that magnetic resonance imaging is currently the most effective medical tool for identifying potentially dangerous lipid plaques in the carotid arteries and can help identify people at risk of stroke. Therefore, MRI magnetic resonance carotid imaging for the clinical diagnosis of carotid artery disease, efficacy tracking is a very attractive technology, and help to develop new lipid-lowering drugs. However, carotid imaging is also difficult. In order to better distinguish the shape and composition of blood vessels, walls and plaques, clinical images should have a high resolution of sub-millimeters in addition to a sufficiently high signal-to-noise ratio. rate. For this reason, carotid iliac crests are usually made with smaller coil elements, because in general, although the small cymbals are not deeply penetrated, they can be placed close to the cymbal attachment. Can have a high signal to noise ratio, but also have a high resolution. The carotid artery is just close to the neck surface, so a small surface line is the primary choice for carotid imaging. Because carotid imaging requires high signal-to-noise ratio (SNR) and resolution (Resolution), it has a certain novelty and difficulty. At present, there are few clinical applications and actual products in this field. At present, the most important 2 x 2 elements of the carotid artery fistula are composed of two parts, left and right (left and right around the neck), each part consisting of two elements, as shown in Figure 1 and Figure 2. . In order to improve the signal-to-noise ratio, according to the classical design idea, the shape and size of the online 圏 are fixed, the more the number of cells of the ideal array 圏, the higher the signal-to-noise ratio of the image near the antenna, but the image in the radial direction. The worse the uniformity and penetration. There is also a 2 x 4 elements design. The design is also divided into two left and right parts. Each part has four elements. The part of each part is shown in Figure 2. However, after testing, it was found that although the image signal-to-noise ratio of the blood vessel attachment was higher than that of the former, the uniformity and penetration were not as high as the 2 X 2 (elements) of Fig. 1, and the clinical effect was generally not as good as the former.
发明内容 Summary of the invention
本发明目的是： 提供一种均匀性和穿透力强、 信噪比高的颈动脉线圏。  The object of the present invention is to provide a carotid artery fistula with high uniformity and penetrating power and high signal to noise ratio.
本发明的技术方案是： 一种颈动脉线圏， 包括线圏单元， 其特征在于， 所述线圏单元 中至少 3个线圏单元并行排列。  The technical solution of the present invention is: A carotid artery fistula, comprising a coil unit, wherein at least three coil units of the coil unit are arranged in parallel.
进一步的，所述线圏包括 3个并行排列的线圏单元和至少横跨于所述 3个并行排列的 线圏单元中一个的横跨线圏单元。 Further, the coil includes three parallel array units and at least across the three parallel arrays A cross-over unit in one of the turns unit.
进一步的， 所述 3个并行排列的线圏单元面积相等。  Further, the three parallel arranged coil units have the same area.
进一步的， 所述 3个并行排列的线圏单元为矩形。  Further, the three parallel arranged coil units are rectangular.
进一步的， 所述横跨线圏单元横跨于所述 3个并行排列的线圏单元。  Further, the cross-line unit straddles the three parallel-array units.
进一步的， 横跨线圏单元为 8字形。  Further, the cross-line unit is 8-shaped.
本发明的优点是：  The advantages of the invention are:
1. 线圏中的 3个并行排列的线圏单元在信噪比和穿透力上有一个很好的平衡。另外 3 个并行排列的线圏单元的排列可是使得磁共振的 IPAT(并行釆集）技术得到更充分的发挥， IPAT效果明显优于目前商用的 2通道线圏。  1. The three parallel-array coil units in the coil have a good balance between signal-to-noise ratio and penetration. The arrangement of the other three parallel arrangement of the line unit can make the IPAT (parallel data collection) technology of the magnetic resonance more fully utilized, and the IPAT effect is obviously superior to the currently commercially available 2-channel line.
2.横跨线圏的结构跟 3个并行排列的线圏单元都成对称结构， 可不需要釆取任何去 耦合措施就能得到艮好的去耦效果， 可以在不影响其他单元的情况下有效增加了线圏的图 像信噪比和均匀性。  2. The structure of the cross-line turns is symmetric with the three parallel-arranged turns, which can achieve good decoupling without any decoupling measures, and can be effective without affecting other units. The image signal-to-noise ratio and uniformity of the turns are increased.
附图说明 DRAWINGS
下面结合附图及实施例对本发明作进一步描述：  The present invention is further described below in conjunction with the accompanying drawings and embodiments:
图 1为现有的颈动脉线圏实际电路图；  Figure 1 is a practical circuit diagram of a conventional carotid artery fistula;
图 2为现有的颈动脉线圏线圏单元分布图；  2 is a distribution diagram of a conventional carotid artery iliac crest unit;
图 3为现有的颈动脉线圏线圏单元分布图；  Figure 3 is a distribution diagram of a conventional carotid artery iliac crest unit;
图 4本发明的颈动脉线圏线圏单元分布图；  Figure 4 is a distribution diagram of the carotid artery iliac crest unit of the present invention;
图 5 现有的颈动脉线圏线圏信噪比的测试图；  Figure 5 is a test chart of the signal-to-noise ratio of the existing carotid artery iliac crest;
图 6现有的颈动脉线圏线圏信噪比的测试图；  Figure 6 is a test chart of the signal-to-noise ratio of the existing carotid artery iliac crest;
图 7本发明的颈动脉线圏线圏信噪比的测试图。  Fig. 7 is a test chart of the signal to noise ratio of the carotid artery iliac crest of the present invention.
具体实施方式 detailed description
实施例： 本发明的颈动脉线圏， 包括左右两个部分的线圏， 每部分线圏有四个线圏单 元（ elements )。 每部分的线圏结构图 4所示， 这个线圏具有 4个线圏单元（ elements ), 其 中三个线圏单元（左中右三个矩形）并行排列， 另外一个线圏单元跨于 3个并行排列的线 圏单元上， 并成一个 "8" 字的单元。 每个线圏的 4个线圏单元为 3+1结构， 即 3个并行 排列的线圏单元（ Loop ) +1个横跨线圏单元（ saddle 3个并行排列的线圏单元（ Loop ) 从左至右排列 （按人体方向是从正面向背面排列）， 另外加了 1个横跨线圏单元（saddle ), 横跨 3个并行排列的线圏单元（ Loop )。 线圏中的 3个并行排列的线圏单元（ Loop )在信 噪比和穿透力上有一个很好的平衡。 另外 3个并行排列的线圏单元（Loop )的排列可是使 得磁共振的 IPAT (并行釆集）技术得到更充分的发挥， IPAT效果明显优于目前商用的 2 通道线圏。 横跨线圏单元（ Saddle ) 的结构跟 3个并行排列的线圏单元（ Loop )都成对称 结构， 可不需要釆取任何去耦合措施就能得到很好的去耦效果并且能有效增加了线圏的图 像信噪比和均匀性。 本实施例的 3+1线圏结构指的是 3个并行排列的线圏单元（Loop ) +1 个横跨线圏单元（ saddle ), 另外一个横跨线圏单元（ saddle ) 与 3个并行排列的线圏单元 ( Loop )都成对称性，以有利于横跨线圏单元（ saddle )跟 3个并行排列的线圏单元（ Loop ) 的去耦合。 这 3个并行排列的线圏单元（Loop )可以面积不等， 横跨线圏单元（saddle ) 可以不横跨 3个线圏单元， 可以只横跨其中的某些 （个）线圏单元， 都能实现本发明。 如 果釆用大于 4个线圏单元的结构， 其中有 4个单元具备上述 3+1结构的， 也可以实现本发 明。 本发明的线圏设计， 在提高线圏信噪比的基础上， 很好的改善了线圏的均匀性和穿透 力。 另外考虑到婴儿的心脏位置， 大小， 跟成人的颈动脉有一定的相似之处， 本线圏除了 可以用作成人动脉成像外， 还可用作婴儿的心脏成像， 也会有很好的效果。 从如图 5、 图 6所示的现有的颈动脉线圏信噪比的测试图与图 7所示的本发明的颈动脉线圏信噪比的测 试图比较， 可以看出本发明的颈动脉线圏明显的信噪比和均匀性优势。 测试具体数值如下 表所示： EXAMPLES: The carotid artery fistula of the present invention comprises two turns of a wire loop, each of which has four turns of elements. The structure of each part is shown in Figure 4. This line has 4 line elements, three of which are arranged in parallel, and the other line is arranged in 3 Parallelly arranged on the line unit, and into a unit of "8" words. The four line units of each line are 3+1 structures, that is, three parallel line units (loops) +1 cross line units (saddle 3 parallel line units (loop) Arranged from left to right (in the direction of the human body from front to back), plus a cross-sag unit (saddle), spanning three parallel-arranged loop units (loops). The three parallel-arranged turns (loops) in the line have a good balance between signal-to-noise ratio and penetration. The arrangement of the other three parallel arranged loop units (Loop) allows the magnetic resonance IPAT (parallel gather) technology to be fully utilized, and the IPAT effect is significantly better than the current commercial 2-channel line. The structure of the Saddle is symmetrical with the three parallel-connected loops. It can be decoupled without any decoupling and can effectively increase the line.信 Image signal to noise ratio and uniformity. The 3+1 line structure in this embodiment refers to three parallel line units (Loop) +1 cross line units (saddle), and another cross line unit (saddle) and three parallels. The arranged loop units are all symmetrical to facilitate decoupling between the line unit (saddle) and the three parallel line units (loops). The three parallel arranged loop units (Loops) can be of different sizes, and the saddle can span no more than three line units, and can only span some of the line units. The present invention can be implemented. The present invention can also be implemented if a structure of more than 4 coil units is used, and 4 of the units have the above 3+1 structure. The coil design of the invention improves the uniformity and penetration of the turns well on the basis of improving the signal-to-noise ratio of the turns. In addition, considering the position and size of the baby's heart, there is a certain similarity with the carotid artery of the adult. In addition to being used for imaging of the adult artery, this line can also be used as a cardiac imaging for the baby, and it will also have a good effect. . Comparing the test pattern of the existing carotid artery 圏 signal-to-noise ratio shown in FIG. 5 and FIG. 6 with the test chart of the carotid artery 圏 signal-to-noise ratio of the present invention shown in FIG. 7, it can be seen that the present invention Carotid artery ridges have significant signal-to-noise ratio and uniformity advantages. The specific values of the test are shown in the following table:
Figure imgf000005_0001
以上实施例仅为本发明其中的一种实施方式， 其描述较为具体和详细，但并不能因此 而理解为对本发明专利范围的限制。 应当指出的是， 对于本领域的普通技术人员来说， 在 不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。 因此， 本发明专利的保护范围应以所附权利要求为准。
Figure imgf000005_0001
The above embodiments are only one of the embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

权利要求 Rights request
1. 一种颈动脉线圏， 包括线圏单元， 其特征在于， 所述线圏单元中至少 3个线圏单 元并行排列。 A carotid artery fistula comprising a coil unit, wherein at least three of the coil units are arranged in parallel.
2.根据权利要求 1所述的颈动脉线圏， 其特征在于， 所述线圏包括 3个并行排列的 线圏单元和至少横跨于所述 3个并行排列的线圏单元中一个的横跨线圏单元。  The carotid artery fistula according to claim 1, wherein the coil includes three parallel coil units arranged in a horizontal direction and at least one of the three parallel aligned coil units. Cross-line unit.
3.根据权利要求 2所述的颈动脉线圏， 其特征在于， 所述 3个并行排列的线圏单元 面积相等。  The carotid artery fistula according to claim 2, wherein the three parallel arranged coil units have the same area.
4.根据权利要求 3所述的颈动脉线圏， 其特征在于， 所述 3个并行排列的线圏单元 为矩形。  The carotid artery fistula according to claim 3, wherein the three parallel-array coil units are rectangular.
5.根据权利要求 4所述的颈动脉线圏，其特征在于， 所述横跨线圏单元横跨于所述 3 个并行排列的线圏单元。  The carotid artery fistula according to claim 4, wherein the cross-web unit spans the three parallel-array units.
6.根据权利要求 5所述的颈动脉线圏， 其特征在于， 横跨线圏单元为 8字形。  The carotid artery fistula according to claim 5, wherein the cross-twist unit is a figure-eight shape.
PCT/CN2012/079247 2011-08-01 2012-07-27 Carotid artery coil WO2013017041A1 (en)

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CN102323556A (en) * 2011-08-01 2012-01-18 苏州众志医疗科技有限公司 Carotid artery coil
CN104375104B (en) * 2014-11-20 2017-04-12 北京清影华康科技有限公司 Carotid artery coil, coil device and coil equipment
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