JP2007170936A - Composite type cylindrical coil for nmr - Google Patents

Composite type cylindrical coil for nmr Download PDF

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JP2007170936A
JP2007170936A JP2005367392A JP2005367392A JP2007170936A JP 2007170936 A JP2007170936 A JP 2007170936A JP 2005367392 A JP2005367392 A JP 2005367392A JP 2005367392 A JP2005367392 A JP 2005367392A JP 2007170936 A JP2007170936 A JP 2007170936A
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coil
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cylindrical coil
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JP5156190B2 (en
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Ryoji Tanaka
良二 田中
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Jeol Ltd
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<P>PROBLEM TO BE SOLVED: To materialize a composite type cylindrical coil for NMR with the uniformity of RF magnetic fields formed in hollow areas unaffected by an RF current flowing through input/output terminals. <P>SOLUTION: First and second cylindrical coils 21 and 22 made by spirally winding are connected at a coil connection part 23 existing in hollow areas of the coils so as to form spirals directed opposite to each other. Both the input/output terminals 24 and 25 are positioned on peripheral parts of the cylindrical coils. This reduces the effect of input/output magnetic fields B<SB>io</SB>formed by electric currents flowing through the input/output terminals 24 and 25 on first and second hollow areas 26 and 27, and in its turn, materializes the enhancement of the uniformity of the RF magnetic fields formed in the hollow areas 26 and 27. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、矩形状の導体シートを長軸方向に巻き上げて円筒形とし、この導体シートの短軸方向と直交する円筒形の円形断面が渦巻き状態をなし、かつこの円形断面の中央に被検体を裁置する中空領域を有するＮＭＲ用複合型円筒形コイルに関する。   In the present invention, a rectangular conductor sheet is rolled up in a major axis direction to form a cylindrical shape, and a cylindrical circular section perpendicular to the minor axis direction of the conductor sheet forms a spiral state, and a subject is located in the center of the circular section. The present invention relates to an NMR composite cylindrical coil having a hollow region.

近年、核磁気共鳴（ＮＭＲ）現象を用いた分析機器は、分子の構造決定等に活用され、広く用いられている。この構造決定では、溶液中の被検体試料の化学シフトを検出する、いわゆる高分解能ＮＭＲの手法が用いられる。高分解能ＮＭＲでは、複数の鋭いスペクトル線が観測され、これらのスペクトル線を分離して観察できることが性能上重要となる。   In recent years, analytical instruments using the nuclear magnetic resonance (NMR) phenomenon have been widely used for molecular structure determination and the like. In this structure determination, a so-called high-resolution NMR technique that detects a chemical shift of an analyte sample in a solution is used. In high-resolution NMR, a plurality of sharp spectral lines are observed, and it is important in terms of performance that these spectral lines can be observed separately.

このスペクトル観察能力は、ＮＭＲ装置を用いてスペクトル信号を観察する際のＳ／Ｎ比（ｓｉｇｎａｌ ｔｏ ｎｏｉｓｅ ｒａｔｉｏ）に大きく依存する。そして、このＳ／Ｎ比は、特にＲＦ信号の送受信を行うＲＦコイルに影響される。   This spectrum observing ability largely depends on the S / N ratio (signal to noise ratio) when observing a spectrum signal using an NMR apparatus. The S / N ratio is particularly affected by the RF coil that transmits and receives RF signals.

このＲＦコイルには、高いＳ／Ｎ比を実現するために、ＲＦ信号が送受信される領域での高いＲＦ磁場均一度、高いＱ値等が要求される。これらの条件を達成するために、例えば、円筒形の導電シートが多層に巻かれた渦巻きコイルが用いられる（例えば、非特許文献１参照）。   In order to realize a high S / N ratio, this RF coil is required to have a high RF magnetic field uniformity, a high Q value, etc. in a region where an RF signal is transmitted and received. In order to achieve these conditions, for example, a spiral coil in which a cylindrical conductive sheet is wound in multiple layers is used (see, for example, Non-Patent Document 1).

図１１は、この渦巻きコイル１０の一例を示す外観図である。渦巻きコイル１０は、矩形状の導電シート２、内側リード３および外側リード４を含む。導電シート２は、長軸方向に渦巻き状に巻かれており、全体として円筒形をなす。この円筒形の中央部分には、中空領域５が存在し、円柱状の試料管等の被検体が裁置される。なお、この中空領域５には、導電シート２に流れる電流により、短軸方向に均一なＲＦ磁場Ｂ1が形成される。 FIG. 11 is an external view showing an example of the spiral coil 10. The spiral coil 10 includes a rectangular conductive sheet 2, an inner lead 3 and an outer lead 4. The conductive sheet 2 is wound in a spiral shape in the long axis direction, and has a cylindrical shape as a whole. A hollow region 5 exists in the central portion of the cylindrical shape, and a subject such as a columnar sample tube is placed. In this hollow region 5, a uniform RF magnetic field B 1 is formed in the minor axis direction by the current flowing through the conductive sheet 2.

また、導電シート２の長軸方向端部には、内側リード３および外側リード４が接続されている。内側リード３および外側リード４は、導電シート２とＲＦ信号の入出力を行う入出力端子である。ここで、内側リード３は、中空領域５に接する導電シート２の長軸方向端部に存在し、外側リード４は、円筒形をなす渦巻きコイル１０の外周部に位置する。   In addition, an inner lead 3 and an outer lead 4 are connected to the end in the major axis direction of the conductive sheet 2. The inner lead 3 and the outer lead 4 are input / output terminals for inputting / outputting RF signals to / from the conductive sheet 2. Here, the inner lead 3 is present at the end of the conductive sheet 2 in contact with the hollow region 5 in the major axis direction, and the outer lead 4 is located at the outer peripheral portion of the spiral coil 10 having a cylindrical shape.

図１２は、渦巻きコイル１０の導電シート２を展開した展開図である。導電シート２の下端部に存在する内側リード３は、長軸方向に巻き込まれ、図１１に示すような渦巻き状の導電シート２を形成する。
グラント（Ｇｒａｎｔ）他著、「アナリシス オブ マルチレイヤーラジオフレクエンシマイクロコイル フォー ニュークリアマグネティックレゾナンススペクトロスコピー（Ａｎａｌｙｓｉｓ ｏｆ Ｍｕｌｔｉｌａｙｅｒ Ｒａｄｉｏ Ｆｒｅｑｕｅｎｃｙ Ｍｉｃｒｏｃｏｉｌｓ ｆｏｒ Ｎｕｃｌｅａｒ Ｍａｇｎｅｔｉｃ Ｒｅｓｏｎａｎｃｅ Ｓｐｅｃｔｒｏｓｃｏｐｙ」，アイトリプルイー トランザクション オン マグネティックス（ＩＥＥＥ ＴＲＡＮＳＡＣＴＩＯＮＳ ＯＮ ＭＡＧＮＥＴＩＣＳ）、米国、２００１年７月、３７巻、ｐ．２９８９〜２９９８ FIG. 12 is a development view in which the conductive sheet 2 of the spiral coil 10 is developed. The inner lead 3 present at the lower end of the conductive sheet 2 is wound in the long axis direction to form a spiral conductive sheet 2 as shown in FIG.
Grant, et al., “Analysis of Multilayer Radio I Sonic Imagine Magnetic Resonance Micro Magnetics for Nuclear Magnetics and Nuclear Magnetics for Nuclear Magnetics.” ), USA, July 2001, 37, p. 2989-2998.

しかしながら、上記背景技術によれば、中空領域５に形成されるＲＦ磁場の均一度が低下する。すなわち、内側リード３には、ＲＦ信号の入出力の際に、導電シート２に流れる電流と直交する方向に同等量の電流が流れる。この電流により形成される中空領域５のＲＦ磁場は、内側リード３が中空領域５に近接するためＢ1と比較して無視できない大きさになると共に、ＲＦ磁場の向きが異なりＲＦ磁場の均一度を乱す要因となる。 However, according to the background art described above, the uniformity of the RF magnetic field formed in the hollow region 5 is reduced. That is, an equal amount of current flows through the inner lead 3 in the direction orthogonal to the current flowing through the conductive sheet 2 when inputting and outputting RF signals. The RF magnetic field of the hollow region 5 formed by this current has a non-negligible magnitude compared to B 1 because the inner lead 3 is close to the hollow region 5, and the RF magnetic field direction is different and the uniformity of the RF magnetic field It becomes a factor disturbing.

さらに、内側リード３および外側リード４は、高周波特性を考慮すると、インダクタンスおよび抵抗の低い、幅の広い導体パターンを用いることが好ましい。しかしながら、内側リード３に幅の広い導体パターンを用いることは、この導体パターンに流れる電流分布が広がることを意味し、ひいてはこの電流分布により形成される中空領域５の不均一磁場領域が広がることにもつながる。   Furthermore, in consideration of high frequency characteristics, it is preferable that the inner lead 3 and the outer lead 4 have a wide conductor pattern with low inductance and resistance. However, the use of a wide conductor pattern for the inner lead 3 means that the current distribution flowing in this conductor pattern is widened. As a result, the non-uniform magnetic field region of the hollow region 5 formed by this current distribution is widened. Is also connected.

これらのことから、中空領域に形成されるＲＦ磁場の均一度が、入出力端子に流れるＲＦ電流に影響されないＮＭＲ用複合型円筒形コイルをいかに実現するかが重要となる。
この発明は、上述した背景技術による課題を解決するためになされたものであり、中空領域に形成されるＲＦ磁場の均一度が、入出力端子に流れるＲＦ電流に影響されないＮＭＲ用複合型円筒形コイルを提供することを目的とする。 For these reasons, it is important how to realize an NMR composite cylindrical coil in which the uniformity of the RF magnetic field formed in the hollow region is not affected by the RF current flowing in the input / output terminals.
The present invention has been made in order to solve the above-described problems caused by the background art, and the uniformity of the RF magnetic field formed in the hollow region is not affected by the RF current flowing through the input / output terminals. An object is to provide a coil.

上述した課題を解決し、目的を達成するために、請求項１に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、矩形状の第１の導体シートを、前記第１の導体シートの第１の長軸方向に巻き上げを行い円筒形とし、前記第１の導体シートの第１の短軸方向と直交する前記円筒形の円形断面が渦巻き状態をなし、かつ前記円形断面の中央部分に被検体を裁置する第１の中空領域を有する第１の円筒形コイルと、矩形状の第２の導体シートを、前記第１の長軸方向と１８０度異なる前記第２の導体シートの第２の長軸方向に巻き上げを行い円筒形とし、前記第２の導体シートの短軸方向を前記第１の短軸方向と一致させ、前記第２の導体シートの短軸方向と直交する前記円筒形の円形断面が渦巻き状態をなし、かつ前記円形断面の中央部分に被検体を裁置する、前記第１の中空領域と前記短軸方向に連続する第２の中空領域を有する第２の円筒形コイルと、前記第１の中空領域に存在する前記第１の導体シートの長軸方向端部および前記第２の中空領域に存在する前記第２の導体シートの長軸方向端部を電気的に接続するコイル接続部と、前記第１の円筒形コイルの外周部に存在する前記第１の導体シートの長軸方向端部および前記第２の円筒形コイルの外周部に存在する前記第２の導体シートの長軸方向端部に、電気信号の入出力を行う入出力端子とを備える。   In order to solve the above-described problems and achieve the object, an NMR composite cylindrical coil according to the first aspect of the present invention includes a rectangular first conductor sheet and a first conductor sheet of the first conductor sheet. 1 is rolled up in the long axis direction to form a cylindrical shape, and the circular cross section of the cylindrical shape perpendicular to the first short axis direction of the first conductor sheet forms a spiral state, and a central portion of the circular cross section is covered. A first cylindrical coil having a first hollow area for placing a specimen and a second conductor sheet having a rectangular shape are different from the second conductor sheet by 180 degrees from the first major axis direction. The cylindrical shape is rolled up in the major axis direction of the second conductor sheet so that the minor axis direction of the second conductor sheet coincides with the first minor axis direction and is orthogonal to the minor axis direction of the second conductor sheet. The circular cross section of the circular cross section forms a spiral, and the central portion of the circular cross section is covered. A second cylindrical coil having a first hollow region and a second hollow region continuous in the minor axis direction, and the first conductor sheet existing in the first hollow region; A coil connecting portion for electrically connecting the long-axis direction end of the second conductor sheet and the long-axis-direction end of the second conductor sheet, and an outer peripheral portion of the first cylindrical coil. Input / output for inputting / outputting electrical signals to / from the longitudinal end of the first conductor sheet and the longitudinal end of the second conductor sheet existing on the outer periphery of the second cylindrical coil. And an output terminal.

この請求項１に記載の発明では、入出力端子を、第１の円筒形コイルおよび第２の円筒形コイルの外周部に位置させる。
また、請求項２に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項１に記載の発明において、前記第１の導体シート、前記第２の導体シート、前記コイル接続部および前記入出力端子が、一枚の導体パターンで形成されることを特徴とする。 According to the first aspect of the present invention, the input / output terminals are located on the outer peripheral portions of the first cylindrical coil and the second cylindrical coil.
An NMR composite cylindrical coil according to a second aspect of the present invention is the first aspect of the invention according to the first aspect, wherein the first conductor sheet, the second conductor sheet, the coil connection portion, and the input coil. The output terminal is formed of a single conductor pattern.

この請求項２に記載の発明では、ＮＭＲ用複合型円筒形コイルを、安価で、製造の容易なものとする。
また、請求項３に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項２に記載の発明において、前記導体パターンが、前記コイル接続部に長軸方向端部を有し、かつ前記コイル接続部を中央とする対称方向に短軸および長軸が位置する矩形状の第１および第２の導体シートを備えることを特徴とする。 In the second aspect of the present invention, the NMR composite cylindrical coil is inexpensive and easy to manufacture.
Further, the NMR composite cylindrical coil according to the invention of claim 3 is the invention according to claim 2, wherein the conductor pattern has a long-axis direction end at the coil connection portion, and It is characterized by comprising rectangular first and second conductor sheets in which the short axis and the long axis are positioned in a symmetric direction with the coil connection portion as the center.

この請求項３に記載の発明では、導体パターンを、第１および第２の導体シートが容易に巻き上げられる形状とする。
また、請求項４に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項３に記載の発明において、前記入出力端子が、前記第１および第２の導体シートの前記コイル接続部が存在しない側の長軸方向端部に、前記第１および第２の導体シート、並びに、前記コイル接続部を含む短軸方向の長さを有する金属板を備えることを特徴とする。 In this invention of Claim 3, let a conductor pattern be a shape where the 1st and 2nd conductor sheet can be rolled up easily.
Moreover, the NMR composite cylindrical coil according to the invention of claim 4 is the invention according to claim 3, wherein the input / output terminal is connected to the coil connecting portion of the first and second conductor sheets. A metal plate having a length in the short axis direction including the first and second conductor sheets and the coil connecting portion is provided at the end portion in the long axis direction on the non-existing side.

この請求項４に記載の発明では、２つの入出力端子の金属板を、第１の円筒形コイルおよび第２の円筒形コイルを形成する際に、重ね合わすことができる構造にする。
また、請求項５に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項４に記載の発明において、前記入出力端子が、前記第１および第２の導体シートの金属板の板面を、平行配置することを特徴とする。 According to the fourth aspect of the present invention, the metal plates of the two input / output terminals have a structure that can be overlapped when forming the first cylindrical coil and the second cylindrical coil.
An NMR composite cylindrical coil according to the invention described in claim 5 is the NMR plate according to claim 4, wherein the input / output terminal is a plate surface of the metal plate of the first and second conductor sheets. Are arranged in parallel.

この請求項５に記載の発明では、金属板を、キャパシタとして機能させる。
また、請求項６に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項１ないし５のいずれか１つに記載の発明において、前記第１の導体シートおよび前記第２の導体シートが、前記第１の円筒形コイルおよび前記第２の円筒形コイルが対向する側の辺縁部に、前記コイル接続部からの距離に比例して前記短軸方向の前記第１および第２の導体シートの長さを短くする傾きを備えることを特徴とする。 In the invention according to the fifth aspect, the metal plate functions as a capacitor.
An NMR composite cylindrical coil according to the invention of claim 6 is the invention according to any one of claims 1 to 5, wherein the first conductor sheet and the second conductor sheet are The first and second conductors in the minor axis direction are in proportion to the distance from the coil connecting portion on the side edge of the first cylindrical coil and the second cylindrical coil facing each other. It is provided with the inclination which shortens the length of a sheet | seat.

この請求項６に記載の発明では、前記第１の円筒形コイルおよび前記第２の円筒形コイルが対向する側の導体シートの辺縁部が、円筒形コイルの外周に近づく程、離れる。
また、請求項７に記載の発明にかかるＮＭＲ用複合型円筒形コイルは、請求項１ないし６のいずれか１つに記載の発明において、前記第１および第２の導体シートが、前記第１の長軸方向および前記第２の長軸方向に、前記円形断面の外円周長さの２倍を越える長さを備えることを特徴とする。 In this invention of Claim 6, it leaves | separates, so that the edge part of the conductor sheet of the side with which the said 1st cylindrical coil and the said 2nd cylindrical coil oppose approaches the outer periphery of a cylindrical coil.
In addition, the NMR composite cylindrical coil according to the invention of claim 7 is the invention according to any one of claims 1 to 6, wherein the first and second conductor sheets are the first conductor sheet. In the major axis direction and the second major axis direction, a length exceeding twice the outer circumferential length of the circular cross section is provided.

この請求項７に記載の発明では、第１および第２の円筒形コイルの渦巻き状態をなす導体シートを、２層以上の多層構造とする。   In the seventh aspect of the invention, the conductor sheet forming the spiral state of the first and second cylindrical coils has a multilayer structure of two or more layers.

以上説明したように、本発明によれば、ＮＭＲ用複合型円筒形コイルの入出力端子を、円筒形コイルの外周部に設けることとしているので、入出力端子に流れる電流により形成される磁場が、被検体が裁置されるＮＭＲ用複合型円筒形コイルの中空領域に及ぼす影響を軽減し、中空領域の磁場均一度を高め、ひいては取得されるＮＭＲ信号のＳ／Ｎを高いものとする。   As described above, according to the present invention, since the input / output terminal of the NMR composite cylindrical coil is provided on the outer peripheral portion of the cylindrical coil, the magnetic field formed by the current flowing through the input / output terminal is reduced. The influence on the hollow region of the NMR composite cylindrical coil on which the subject is placed is reduced, the magnetic field uniformity of the hollow region is increased, and the S / N of the acquired NMR signal is increased.

以下に添付図面を参照して、この発明にかかるＮＭＲ用複合型円筒形コイル（以下、複合型円筒形コイルと称する）を実施するための最良の形態について説明する。なお、これにより本発明が限定されるものではない。
（実施の形態１）
まず、本実施の形態１にかかるＮＭＲ装置１００についての概略の構成を図１に示す。図１は、ＮＭＲ装置１００の概略の構成を示す図である。ＮＭＲ装置１００は、静磁場発生装置９９、複合型円筒形コイル２０、試料管１およびＲＦ送受信部９８等を含む。静磁場発生装置９９は、超電導あるいは常電導等のマグネットで、複合型円筒形コイル２０および試料管１が存在する空間に均一な静磁場Ｂ０を発生する。 The best mode for carrying out a composite cylindrical coil for NMR (hereinafter referred to as a composite cylindrical coil) according to the present invention will be described below with reference to the accompanying drawings. Note that the present invention is not limited thereby.
(Embodiment 1)
First, FIG. 1 shows a schematic configuration of the NMR apparatus 100 according to the first embodiment. FIG. 1 is a diagram showing a schematic configuration of the NMR apparatus 100. The NMR apparatus 100 includes a static magnetic field generator 99, a composite cylindrical coil 20, a sample tube 1, an RF transmitter / receiver 98, and the like. The static magnetic field generator 99 is a superconducting or normal conducting magnet, and generates a uniform static magnetic field B0 in the space where the composite cylindrical coil 20 and the sample tube 1 are present.

試料管１は、内部に液体状の検査試料を含む密封されたキャピラリである。複合型円筒形コイル２０は、中心部に試料管１を配置した状態で、試料管１に均一なＲＦ磁場Ｂ１を照射し、また、試料管１に検査試料が発生するＲＦ磁場を検出する。なお、このＲＦ磁場Ｂ１は、静磁場Ｂ０と直行する水平方向をなすｘ軸方向に形成される。   The sample tube 1 is a sealed capillary that contains a liquid test sample inside. The composite cylindrical coil 20 irradiates the sample tube 1 with a uniform RF magnetic field B1 in a state where the sample tube 1 is disposed at the center, and detects an RF magnetic field generated in the sample tube 1 from the inspection sample. The RF magnetic field B1 is formed in the x-axis direction that forms a horizontal direction perpendicular to the static magnetic field B0.

ＲＦ送受信部９８は、複合型円筒形コイル２０にＲＦ磁場Ｂ１を発生するためのＲＦ電流を供給し、また、複合型円筒形コイル２０が受信したＲＦ電流を受信する。なお、ＲＦ送受信部９８の後段には、図示しないＲＦ送受信の制御部、受信したＲＦ電流の記録部等が存在する。なお、図中に示されるｘｙｚ軸は、すべての図面で共通する方向を指し示す座標軸をなし、図面間の相対的な位置関係を示す。   The RF transmitter / receiver 98 supplies an RF current for generating the RF magnetic field B1 to the composite cylindrical coil 20 and receives the RF current received by the composite cylindrical coil 20. Note that an RF transmission / reception control unit (not shown), a received RF current recording unit, and the like are present at the subsequent stage of the RF transmission / reception unit 98. An xyz axis shown in the drawing is a coordinate axis indicating a direction common to all drawings, and indicates a relative positional relationship between the drawings.

図２は、複合型円筒形コイル２０の全体構成を示す外観図である。複合型円筒形コイル２０は、入出力端子２４、第１の円筒形コイル２１、コイル接続部２３、第２の円筒形コイル２２および入出力端子２５を含む。ここで、入出力端子２４、第１の円筒形コイル２１、コイル接続部２３、第２の円筒形コイル２２および入出力端子２５は、一枚の導体シート３０から構成されている。   FIG. 2 is an external view showing the overall configuration of the composite cylindrical coil 20. The composite cylindrical coil 20 includes an input / output terminal 24, a first cylindrical coil 21, a coil connection portion 23, a second cylindrical coil 22, and an input / output terminal 25. Here, the input / output terminal 24, the first cylindrical coil 21, the coil connection portion 23, the second cylindrical coil 22, and the input / output terminal 25 are configured by a single conductor sheet 30.

図３は、この導体シート３０を、ｘｙ平面上に展開した展開図である。導体シート３０は、銅等の電気導体からなり、入出力シート３４、第１の導体シート３１、導体接続シート３３、第２の導体シート３２および入出力シート３５を含む。ここで、導体シート３０は、導体接続シート３３を対称中心として、入出力シート３４および第１の導体シート３１と、導体接続シート３３および第２の導体シート３２とが点対称の構造を有する。   FIG. 3 is a development view in which the conductor sheet 30 is developed on the xy plane. The conductor sheet 30 is made of an electric conductor such as copper, and includes an input / output sheet 34, a first conductor sheet 31, a conductor connection sheet 33, a second conductor sheet 32, and an input / output sheet 35. Here, the conductor sheet 30 has a structure in which the input / output sheet 34 and the first conductor sheet 31, and the conductor connection sheet 33 and the second conductor sheet 32 are point-symmetric with respect to the conductor connection sheet 33.

第１の導体シート３１は、ｙ軸方向に長軸を有する矩形状の導体シートであり、第２の導体シート３２もまた同様である。これら第１および第２の導体シート３１および３２は、長軸方向端部において、導体接続シート３３により電気接続される。   The first conductor sheet 31 is a rectangular conductor sheet having a major axis in the y-axis direction, and the second conductor sheet 32 is the same. The first and second conductor sheets 31 and 32 are electrically connected by the conductor connection sheet 33 at the ends in the major axis direction.

一方、導体接続シート３３が存在しない第１の導体シート３１の長軸方向端部には、長軸方向に伸びた入出力シート３４が存在する。同様に、第２の導体シート３２の導体接続シート３３が存在しない長軸方向端部にも、長軸方向に伸びた入出力シート３５が存在する。   On the other hand, an input / output sheet 34 extending in the long axis direction is present at the end in the long axis direction of the first conductor sheet 31 where the conductor connection sheet 33 is not present. Similarly, the input / output sheet 35 extending in the long axis direction is also present at the end portion in the long axis direction of the second conductor sheet 32 where the conductor connection sheet 33 is not present.

ここで、第１の導体シート３１は、第１の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた図１に示す様な多層の第１の円筒形コイル２１を形成する。また、同様に、第２の導体シート３２は、第２の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた多層の第２の円筒形コイル２２を形成する。   Here, the first conductor sheet 31 is wound in the first major axis direction to form a multilayer first cylindrical coil 21 as shown in FIG. 1 in which the conductor sheet is wound in a spiral shape. Similarly, the second conductor sheet 32 is wound in the second major axis direction to form a multilayer second cylindrical coil 22 in which the conductor sheet is wound in a spiral shape.

図２に戻り、第１の円筒形コイル２１は、中央部分に第１の中空領域２６を有する。また、同様に、第２の円筒形コイル２２は、図２の第２の円筒形コイル２２に隠された中央部分に第２の中空領域２７を有する。   Returning to FIG. 2, the first cylindrical coil 21 has a first hollow region 26 in the central portion. Similarly, the second cylindrical coil 22 has a second hollow region 27 in a central portion hidden by the second cylindrical coil 22 of FIG.

ここで、第１の中空領域２６および第１の中空領域２７は、ｘ軸方向に共通の中心軸を有する円筒空間を形成する。そして、この円筒空間には、被検体である試料管１が配設される。また、この円筒空間には、導体接続シート３３からなるコイル接続部２３が存在する。コイル接続部２３は、第１の円筒形コイル２１および第２の円筒形コイル２２を、円筒空間内の最短距離で電気接続し、第１の円筒形コイル２１に流れる電流が、第２の円筒形コイル２２に流れる様にする。   Here, the first hollow region 26 and the first hollow region 27 form a cylindrical space having a common central axis in the x-axis direction. In this cylindrical space, a sample tube 1 as a subject is arranged. Further, in this cylindrical space, there is a coil connection portion 23 made of the conductor connection sheet 33. The coil connection portion 23 electrically connects the first cylindrical coil 21 and the second cylindrical coil 22 at the shortest distance in the cylindrical space, and the current flowing through the first cylindrical coil 21 is the second cylinder. It is made to flow to the shape coil 22.

また、入出力シート３４および３５は、入出力端子２４および２５を形成する。入出力端子２４および２５は、ＲＦ送受信部９８に接続されＲＦ電流信号の入出力を行う。ここで、入出力端子２４および２５は、共に第１の円筒形コイル２１および第２の円筒形コイル２２の中央に形成される中空領域とは反対の外側に位置する。   Input / output sheets 34 and 35 form input / output terminals 24 and 25. The input / output terminals 24 and 25 are connected to the RF transmitting / receiving unit 98 and input / output an RF current signal. Here, the input / output terminals 24 and 25 are both located on the outer side opposite to the hollow region formed in the center of the first cylindrical coil 21 and the second cylindrical coil 22.

図４（Ａ）は、複合型円筒形コイル２０を、ｚ軸方向から見た外観図である。左側に第１の円筒形コイル２１、右側に第２の円筒形コイル２２が存在し、その間に両円筒形コイルを電気接続するコイル接続部２３が存在する。図４（Ｂ）は、図４（Ａ）に示した複合型円筒形コイル２０の中空領域に試料管１を配置した図である。試料管１は、第１の円筒形コイル２１および第２の円筒形コイル２２に共通する中空領域を抜く様に配置される。   FIG. 4A is an external view of the composite cylindrical coil 20 viewed from the z-axis direction. There is a first cylindrical coil 21 on the left side and a second cylindrical coil 22 on the right side, and there is a coil connecting portion 23 that electrically connects both cylindrical coils. FIG. 4B is a diagram in which the sample tube 1 is arranged in the hollow region of the composite cylindrical coil 20 shown in FIG. The sample tube 1 is arranged so as to extract a hollow region common to the first cylindrical coil 21 and the second cylindrical coil 22.

図５は、複合型円筒形コイル２０によるＲＦ磁場形成の動作を、模式的に示した図である。ここで、図５では、わかりやすくするためＲＦ電流が入出力端子２４から入力し、入出力端子２５から出力する場合のみの電流が流れる向きを矢印で示した。なお、実際には、ＲＦ電流であるので、これら電流の向きおよび大きさは、みな共通の時間的変化をする。   FIG. 5 is a diagram schematically showing the operation of forming the RF magnetic field by the composite cylindrical coil 20. Here, in FIG. 5, for the sake of simplicity, the direction in which the current flows only when the RF current is input from the input / output terminal 24 and output from the input / output terminal 25 is indicated by an arrow. Since the current is actually an RF current, the direction and magnitude of these currents all change in time.

まず、ＲＦ送受信部９８から、入出力端子２４を介して入力した入出力電流５０は、第１の円筒形コイル２１内で第１の電流５２で示した方向に流れる。第１の電流５２は、渦巻き状に巻かれた第１の円筒形コイル２１内を第１の中空領域２６に向かって渦巻き状に進み、コイル接続部２３に達する。コイル接続部２３に達した第１の電流５２は、接続部電流５１となって、進行方向を変えることなくｘ軸方向に所定量だけ移動した後に、第２の円筒形コイル２２に入力する。   First, the input / output current 50 input from the RF transmitting / receiving unit 98 via the input / output terminal 24 flows in the direction indicated by the first current 52 in the first cylindrical coil 21. The first current 52 advances spirally in the first cylindrical coil 21 wound in a spiral toward the first hollow region 26 and reaches the coil connection portion 23. The first current 52 that has reached the coil connecting portion 23 becomes the connecting portion current 51 and moves to the x-axis direction by a predetermined amount without changing the traveling direction, and is then input to the second cylindrical coil 22.

その後、第２の円筒形コイル２２に入力した接続部電流５１は、第２の中空領域２７から、逆の渦巻き状に巻かれた第２の円筒形コイル２２内を入出力端子２５に向かって、第２の電流５３で示す方向に流れる。そして、第２の電流５３は、入出力端子２５に達し入出力電流５４としてＲＦ送受信部９８に出力される。   Thereafter, the connection portion current 51 input to the second cylindrical coil 22 is directed from the second hollow region 27 to the input / output terminal 25 through the second cylindrical coil 22 wound in a reverse spiral shape. , And flows in the direction indicated by the second current 53. Then, the second current 53 reaches the input / output terminal 25 and is output to the RF transmitting / receiving unit 98 as the input / output current 54.

そして、同一の向きに流れる第１の電流５２および第２の電流５３は、第１の円筒形コイル２１および第２の円筒形コイル２２が有する第１の中空領域２６および第２の中空領域２７に、ｘ軸方向を向く均一な磁場Ｂ１を形成する。また、接続部電流５１は、ｘ軸方向に所定量だけ移動したことによる擾乱磁場を、第１の中空領域２６および第２の中空領域２７に発生させる。また、入出力電流５０および５４は、入出力端子２４および２５の周囲に入出力磁場Ｂioを発生させる。 The first current 52 and the second current 53 that flow in the same direction are the first hollow region 26 and the second hollow region 27 that the first cylindrical coil 21 and the second cylindrical coil 22 have. In addition, a uniform magnetic field B1 oriented in the x-axis direction is formed. Further, the connection portion current 51 generates a disturbing magnetic field in the first hollow region 26 and the second hollow region 27 due to movement by a predetermined amount in the x-axis direction. The input / output currents 50 and 54 generate an input / output magnetic field B io around the input / output terminals 24 and 25.

ここで、入出力電流５０および５４は、第１の電流５２および第２の電流５３と等しい大きさの電流であり、概ね磁場Ｂ１に匹敵する大きさの異なる向きの入出力磁場Ｂioを発生させる。しかし、入出力端子２４および２５は、共に第１の円筒形コイル２１および第２の円筒形コイル２２の外側に位置し、第１の中空領域２６および第２の中空領域２７とは、若干の距離があり、入出力磁場Ｂioの影響が限定される。ちなみに、図１１に示した渦巻きコイル１０では、内側リード３が中空領域５から引き出されるために、内側リード３により形成される磁場の影響は、中空領域５に強く及ぶ。 Here, the input / output currents 50 and 54 are currents of the same magnitude as the first current 52 and the second current 53, and generate an input / output magnetic field Bio having a magnitude different from that of the magnetic field B1. Let However, the input / output terminals 24 and 25 are both located outside the first cylindrical coil 21 and the second cylindrical coil 22, and the first hollow region 26 and the second hollow region 27 are slightly different from each other. There is a distance and the influence of the input / output magnetic field B io is limited. Incidentally, in the spiral coil 10 shown in FIG. 11, since the inner lead 3 is drawn out from the hollow region 5, the magnetic field formed by the inner lead 3 strongly affects the hollow region 5.

また、接続部電流５１は、ｘ軸方向に所定量だけ電流の流れる位置が移動したことによる擾乱磁場を発生させる。しかし、移動距離が隣接する円筒形コイル間の短い距離であり、また、この擾乱磁場の向きが磁場Ｂ１と直交する面内にあるため、第１の中空領域２６および第２の中空領域２７Ｂ１に発生される擾乱磁場の影響は、限定されたものとなる。   The connection portion current 51 generates a turbulent magnetic field due to the movement of the current flowing position by a predetermined amount in the x-axis direction. However, since the moving distance is a short distance between adjacent cylindrical coils and the direction of the disturbance magnetic field is in a plane orthogonal to the magnetic field B1, the first hollow region 26 and the second hollow region 27B1 The effect of the generated disturbing magnetic field is limited.

上述してきたように、本実施の形態１では、渦巻き状に巻かれた第１および第２の円筒形コイルを、コイルの中空領域にあるコイル接続部２３で、互いに逆向きの渦巻きを形成するように接続し、入出力端子２４および２５を共に第１および第２の円筒形コイルの外周部に位置させることとしているので、入出力端子２４および２５に流れる電流により形成される入出力磁場Ｂioの第１の中空領域２６および第２の中空領域２７に対する影響を小さなものとし、ひいては第１の中空領域２６および第２の中空領域２７に形成されるＲＦ磁場を均一度の高いものにすることができる。
（実施の形態２）
ところで、上記実施の形態１では、複合型円筒形コイル２０の入出力端子２４および２５は、入出力シート３４および３５からなり、ＲＦ送受信部９８からの電流信号を入出力することとしたが、この部分に平面の金属板を付加し、この金属板を平行配置することにより、キャパシタとして機能させることもできる。そこで、本実施の形態２では、入出力端子に金属板を設け、キャパシタとして機能させる場合を示すことにする。 As described above, in the first embodiment, the first and second cylindrical coils wound in a spiral are formed into spirals in opposite directions at the coil connecting portion 23 in the hollow region of the coil. Since the input / output terminals 24 and 25 are both positioned on the outer periphery of the first and second cylindrical coils, the input / output magnetic field B formed by the current flowing through the input / output terminals 24 and 25 The influence of io on the first hollow region 26 and the second hollow region 27 is made small, and hence the RF magnetic field formed in the first hollow region 26 and the second hollow region 27 is made highly uniform. be able to.
(Embodiment 2)
By the way, in the first embodiment, the input / output terminals 24 and 25 of the composite cylindrical coil 20 are formed of the input / output sheets 34 and 35 and input / output current signals from the RF transmitting / receiving unit 98. By adding a flat metal plate to this portion and arranging the metal plates in parallel, it can function as a capacitor. Therefore, the second embodiment shows a case where a metal plate is provided at the input / output terminal to function as a capacitor.

図６、複合型円筒形コイル６０の全体構成を示す外観図である。ここで、複合型円筒形コイル６０は、図１に示した複合型円筒形コイル２０に対応するもので、その他の構成は図１に示したＮＭＲ装置１００と全く同様であるので説明を省略する。   FIG. 6 is an external view showing the overall configuration of the composite cylindrical coil 60. Here, the composite cylindrical coil 60 corresponds to the composite cylindrical coil 20 shown in FIG. 1, and the other configuration is the same as that of the NMR apparatus 100 shown in FIG. .

複合型円筒形コイル６０は、入出力端子６４、第１の円筒形コイル６１、コイル接続部６３、第２の円筒形コイル６２および入出力端子６５を含む。ここで、入出力端子６４、第１の円筒形コイル６１、コイル接続部６３、第２の円筒形コイル６２および入出力端子６５は、一枚の導体シート７０から構成されている。   The composite cylindrical coil 60 includes an input / output terminal 64, a first cylindrical coil 61, a coil connection portion 63, a second cylindrical coil 62, and an input / output terminal 65. Here, the input / output terminal 64, the first cylindrical coil 61, the coil connecting portion 63, the second cylindrical coil 62, and the input / output terminal 65 are configured from a single conductor sheet 70.

図３は、この導体シート７０を、ｘｙ平面上に展開した展開図である。導体シート７０は、銅等の電気導体からなり、金属板７６、入出力シート７４、第１の導体シート７１、導体接続シート７３、第２の導体シート７２、入出力シート７５および金属板７７を含む。ここで、導体シート７０は、導体接続シート７３を対称中心として、点対称の構造を有する。   FIG. 3 is a development view in which the conductor sheet 70 is developed on the xy plane. The conductor sheet 70 is made of an electrical conductor such as copper, and includes a metal plate 76, an input / output sheet 74, a first conductor sheet 71, a conductor connection sheet 73, a second conductor sheet 72, an input / output sheet 75 and a metal plate 77. Including. Here, the conductor sheet 70 has a point-symmetric structure with the conductor connection sheet 73 as the center of symmetry.

第１の導体シート７１は、ｙ軸方向に長軸を有する矩形状の導体シートであり、第２の導体シート７２もまた同様である。これら第１および第２の導体シート７１および７２は、長軸方向端部において、導体接続シート７３により電気接続される。   The first conductor sheet 71 is a rectangular conductor sheet having a major axis in the y-axis direction, and the second conductor sheet 72 is the same. The first and second conductor sheets 71 and 72 are electrically connected by a conductor connection sheet 73 at the ends in the major axis direction.

一方、導体接続シート７３が存在しない第１の導体シート７１の長軸方向端部には、長軸方向に伸びた入出力シート７４および金属板７６が存在する。同様に、第２の導体シート７２の導体接続シート７３が存在しない長軸方向端部にも、長軸方向に伸びた入出力シート７５および金属板７７が存在する。   On the other hand, an input / output sheet 74 and a metal plate 76 extending in the long axis direction are present at the end portion in the long axis direction of the first conductor sheet 71 where the conductor connection sheet 73 does not exist. Similarly, the input / output sheet 75 and the metal plate 77 extending in the long axis direction are also present at the end portion in the long axis direction of the second conductor sheet 72 where the conductor connection sheet 73 does not exist.

ここで、第１の導体シート７１は、第１の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた図６に示す様な多層の第１の円筒形コイル６１を形成する。また、同様に、第２の導体シート７２は、第２の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた多層の第２の円筒形コイル６２を形成する。   Here, the first conductor sheet 71 is wound in the first major axis direction to form a multilayer first cylindrical coil 61 as shown in FIG. 6 in which the conductor sheet is wound in a spiral shape. Similarly, the second conductor sheet 72 is wound in the second major axis direction to form a multilayer second cylindrical coil 62 in which the conductor sheet is wound in a spiral shape.

図６に戻り、第１の円筒形コイル６１および第２の円筒形コイル６２は、中央部分に試料管１を配置する中空の円筒空間が存在する。そして、この円筒空間には、導体接続シート７３からなるコイル接続部６３が存在する。コイル接続部６３は、第１の円筒形コイル６１および第２の円筒形コイル６２を、円筒空間内の最短距離で電気接続し、第１の円筒形コイル６１に流れる電流が、第２の円筒形コイル６２に流れる様にする。   Returning to FIG. 6, the first cylindrical coil 61 and the second cylindrical coil 62 have a hollow cylindrical space in which the sample tube 1 is disposed in the central portion. And in this cylindrical space, the coil connection part 63 which consists of the conductor connection sheet 73 exists. The coil connecting portion 63 electrically connects the first cylindrical coil 61 and the second cylindrical coil 62 at the shortest distance in the cylindrical space, and the current flowing through the first cylindrical coil 61 is the second cylinder. The flow is made to flow through the coil 62.

また、入出力シート７４および金属板７６、並びに、入出力シート７５および金属板７７は、入出力端子６４および６５を形成する。入出力端子６４および６５は、ＲＦ送受信部９８に接続されＲＦ電流信号の入出力を行う。ここで、金属板７６および７７は、ｘ軸方向に重なり合う長さを有し、所定の距離を置いて平行平面板をなすように配置される。   The input / output sheet 74 and the metal plate 76, and the input / output sheet 75 and the metal plate 77 form input / output terminals 64 and 65. The input / output terminals 64 and 65 are connected to the RF transmitting / receiving unit 98 and input / output an RF current signal. Here, the metal plates 76 and 77 have a length that overlaps in the x-axis direction, and are arranged so as to form parallel plane plates at a predetermined distance.

図８は、複合型円筒形コイル６０を、ｚ軸方向から見た外観図である。複合型円筒形コイル６０の中空領域には、試料管１が配置されている。また、入出力端子６４および６５は、金属板７６および７７部分が、重なり合っている。   FIG. 8 is an external view of the composite cylindrical coil 60 as seen from the z-axis direction. In the hollow region of the composite cylindrical coil 60, the sample tube 1 is arranged. In addition, the input / output terminals 64 and 65 have metal plates 76 and 77 overlapping each other.

ここで、所定の距離を置いてｚ軸方向に重なり合う金属板７６および７７は、キャパシタとして機能する。そして、このキャパシタは、第１の円筒形コイル６１および第２の円筒形コイル６２の有するインダクタンスと共に、核磁気共鳴の共振系を構成する。この共振系は、無駄な配線がなくＱ値の高いものとなる。なお、金属板７６および７７の面積および距離は、核磁気共鳴の共振周波数および円筒形コイルのインダクタンスから決定される。   Here, the metal plates 76 and 77 overlapping in the z-axis direction at a predetermined distance function as capacitors. And this capacitor comprises the resonance system of nuclear magnetic resonance with the inductance which the 1st cylindrical coil 61 and the 2nd cylindrical coil 62 have. This resonance system has a high Q value without wasteful wiring. The areas and distances of the metal plates 76 and 77 are determined from the resonance frequency of nuclear magnetic resonance and the inductance of the cylindrical coil.

上述してきたように、本実施の形態２では、入出力端子６４および６５に、金属板７６および７７を設け、所定の距離を持って平行に配置することとしているので、入出力端子６４および６５をキャパシタとして機能させ、簡易な構成でＱ値の高い共振系を構成することができる。
（実施の形態３）
ところで、上記実施の形態１では、複合型円筒形コイル２０の第１の導体シート３１および第２の導体シート３２は矩形状の形をしており、第１の円筒形コイル６１および第２の円筒形コイル６２の導体シート間の距離は一定であるとしたが、第１の導体シートおよび第２の導体シートの形状を先細り状とし、第１の円筒形コイルおよび第２の円筒形コイルの導体シート間の距離が、渦巻きの外側に行くほど大きくなるようにし、導体シート間の耐電圧を高くすることもできる。そこで、本実施の形態３では、第１の導体シートおよび第２の導体シートの形状を先細り状とし、耐電圧を高める場合を示すことにする。 As described above, in the second embodiment, the input / output terminals 64 and 65 are provided with the metal plates 76 and 77 and arranged in parallel at a predetermined distance. Can function as a capacitor, and a resonant system with a high Q value can be configured with a simple configuration.
(Embodiment 3)
By the way, in the first embodiment, the first conductor sheet 31 and the second conductor sheet 32 of the composite cylindrical coil 20 have a rectangular shape, and the first cylindrical coil 61 and the second conductor sheet 32 have the rectangular shape. Although the distance between the conductor sheets of the cylindrical coil 62 is constant, the first conductor sheet and the second conductor sheet are tapered, and the first and second cylindrical coils are tapered. It is also possible to increase the withstand voltage between the conductor sheets by increasing the distance between the conductor sheets toward the outside of the spiral. Therefore, in the present third embodiment, the case where the first conductor sheet and the second conductor sheet are tapered to increase the withstand voltage will be described.

図８、複合型円筒形コイル８０の全体構成を、ｚ軸方向から見た外観図である。ここで、複合型円筒形コイル８０は、図１に示した複合型円筒形コイル２０に対応するもので、その他の構成は図１に示したＮＭＲ装置１００と全く同様であるので説明を省略する。   FIG. 8 is an external view of the overall configuration of the composite cylindrical coil 80 as seen from the z-axis direction. Here, the composite cylindrical coil 80 corresponds to the composite cylindrical coil 20 shown in FIG. 1, and the other configuration is the same as that of the NMR apparatus 100 shown in FIG. .

複合型円筒形コイル８０は、入出力端子８４、第１の円筒形コイル８１、コイル接続部８３、第２の円筒形コイル８２および入出力端子８５を含む。ここで、入出力端子８４、第１の円筒形コイル８１、コイル接続部８３、第２の円筒形コイル８２および入出力端子８５は、一枚の導体シート９０から構成されている。   The composite cylindrical coil 80 includes an input / output terminal 84, a first cylindrical coil 81, a coil connection portion 83, a second cylindrical coil 82 and an input / output terminal 85. Here, the input / output terminal 84, the first cylindrical coil 81, the coil connection portion 83, the second cylindrical coil 82, and the input / output terminal 85 are configured from a single conductor sheet 90.

図１０は、この導体シート９０を、ｘｙ平面上に展開した展開図である。導体シート９０は、銅等の電気導体からなり、入出力シート９４、第１の導体シート９１、導体接続シート９３、第２の導体シート９２および入出力シート９５を含む。ここで、導体シート９０は、導体接続シート９３を対称中心として、点対称の構造を有する。   FIG. 10 is a development view in which the conductor sheet 90 is developed on the xy plane. The conductor sheet 90 is made of an electrical conductor such as copper, and includes an input / output sheet 94, a first conductor sheet 91, a conductor connection sheet 93, a second conductor sheet 92, and an input / output sheet 95. Here, the conductor sheet 90 has a point-symmetric structure with the conductor connection sheet 93 as the center of symmetry.

第１の導体シート９１は、ｙ軸方向にあたる長軸方向に第１の傾き９６を有する先細り状の導体シートであり、第２の導体シート９２もまた同様である。これら第１および第２の導体シート９１および９２は、長軸方向端部において、導体接続シート９３により電気接続される。   The first conductor sheet 91 is a tapered conductor sheet having a first inclination 96 in the major axis direction corresponding to the y-axis direction, and the second conductor sheet 92 is also the same. The first and second conductor sheets 91 and 92 are electrically connected by the conductor connection sheet 93 at the ends in the major axis direction.

一方、導体接続シート９３が存在しない第１の導体シート９１の長軸方向端部に向かって、第１の傾き９６が存在する。第１の傾き９６は、第１の円筒形コイル８１および第２の円筒形コイル８２の導体シートが向き合う側に設けられ、入出力シート９４に近づくにつれて短軸であるｘ軸方向の導体幅が短くなる。また、第２の導体シート９２も同様の第２の傾き９７を有する。   On the other hand, the first inclination 96 exists toward the end portion in the long axis direction of the first conductor sheet 91 where the conductor connection sheet 93 does not exist. The first inclination 96 is provided on the side where the conductor sheets of the first cylindrical coil 81 and the second cylindrical coil 82 face each other. Shorter. Further, the second conductor sheet 92 has the same second inclination 97.

ここで、第１の導体シート９１は、第１の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた図２に示す様な多層の第１の円筒形コイル８１を形成する。また、同様に、第２の導体シート９２は、第２の長軸方向に巻き込まれ、導体シートが渦巻き状に巻き込まれた多層の第２の円筒形コイル８２を形成する。なお、この際、渦巻き状に巻かれた多層の導体シートは、円筒形コイルの外周に近づく程、第１の円筒形コイル８１および第２の円筒形コイル８２間の距離が大きくなる。   Here, the first conductor sheet 91 is wound in the first major axis direction to form a multilayer first cylindrical coil 81 as shown in FIG. 2 in which the conductor sheet is wound in a spiral shape. Similarly, the second conductor sheet 92 is wound in the second major axis direction to form a multilayer second cylindrical coil 82 in which the conductor sheet is wound in a spiral shape. At this time, the distance between the first cylindrical coil 81 and the second cylindrical coil 82 increases as the multilayered conductor sheet wound in a spiral shape approaches the outer periphery of the cylindrical coil.

図９に戻り、第１の円筒形コイル８１および第２の円筒形コイル８２は、中央部分に試料管１を配置する中空の円筒空間が存在する。そして、この円筒空間には、導体接続シート９３からなるコイル接続部８３が存在する。コイル接続部８３は、第１の円筒形コイル８１および第２の円筒形コイル８２を、円筒空間内の最短距離で電気接続し、第１の円筒形コイル８１に流れる電流が、第２の円筒形コイル８２に流れる様にする。   Returning to FIG. 9, the first cylindrical coil 81 and the second cylindrical coil 82 have a hollow cylindrical space in which the sample tube 1 is disposed in the central portion. And in this cylindrical space, the coil connection part 83 which consists of the conductor connection sheet 93 exists. The coil connection portion 83 electrically connects the first cylindrical coil 81 and the second cylindrical coil 82 at the shortest distance in the cylindrical space, and the current flowing through the first cylindrical coil 81 is the second cylinder. The flow is made to flow through the coil 82.

また、入出力シート９４および９５は、入出力端子８４および８５を形成する。入出力端子８４および８５は、ＲＦ送受信部９８に接続されＲＦ電流信号の入出力を行う。
ここで、入出力端子８４および８５間に入力されるＲＦ電流は、第１の円筒形コイル８１および第２の円筒形コイル８２内で電圧降下を発生させる。この電圧降下により生じる第１の円筒形コイル８１および第２の円筒形コイル８２間の電圧は、入出力端子８４および８５に近い程大きく、コイル接続部８３に近い程小さくなる。 Input / output sheets 94 and 95 form input / output terminals 84 and 85. The input / output terminals 84 and 85 are connected to the RF transmitting / receiving unit 98 and input / output an RF current signal.
Here, the RF current input between the input / output terminals 84 and 85 causes a voltage drop in the first cylindrical coil 81 and the second cylindrical coil 82. The voltage between the first cylindrical coil 81 and the second cylindrical coil 82 generated by this voltage drop is larger as it is closer to the input / output terminals 84 and 85 and is smaller as it is closer to the coil connection portion 83.

一方、複合型円筒形コイル８０では、第１の傾き９６および第２の傾き９７により、入出力端子８４および８５に近い程、隣接する円筒形コイル間の導体シート間隔が大きくなり、耐電圧が大きくなる。従って、第１の円筒形コイル８１および第２の円筒形コイル８２間の耐電圧は、全体として高いものとなり、絶縁破壊等による放電を軽減することができる。   On the other hand, in the composite cylindrical coil 80, due to the first inclination 96 and the second inclination 97, the closer to the input / output terminals 84 and 85, the larger the conductor sheet interval between the adjacent cylindrical coils, and the withstand voltage becomes. growing. Therefore, the withstand voltage between the first cylindrical coil 81 and the second cylindrical coil 82 is high as a whole, and discharge due to dielectric breakdown or the like can be reduced.

上述してきたように本実施の形態３では、第１の導体シート９１および第２の導体シート９２は、第１の傾き９６および第２の傾き９７を有するので、複合型円筒形コイル８０の第１の円筒形コイル８１および第２の円筒形コイル８２間の耐電圧を大きなものとし、絶縁破壊等による放電を軽減することができる。   As described above, in the third embodiment, the first conductor sheet 91 and the second conductor sheet 92 have the first inclination 96 and the second inclination 97, so The withstand voltage between the first cylindrical coil 81 and the second cylindrical coil 82 can be increased, and discharge due to dielectric breakdown or the like can be reduced.

ＮＭＲ装置の構成を示す構成図である。It is a block diagram which shows the structure of an NMR apparatus. 実施の形態１にかかる複合型円筒形コイルの外観を示す外観図である。1 is an external view showing an external appearance of a composite cylindrical coil according to a first embodiment. 実施の形態１にかかる複合型円筒形コイルを構成する導体シートの展開図である。FIG. 3 is a development view of a conductor sheet constituting the composite cylindrical coil according to the first embodiment. 実施の形態１にかかる複合型円筒形コイルを側面から見た平面図である。It is the top view which looked at the composite type cylindrical coil concerning Embodiment 1 from the side surface. 実施の形態１にかかる複合型円筒形コイルの電流の流れを示す説明図である。FIG. 3 is an explanatory diagram showing a current flow of the composite cylindrical coil according to the first embodiment. 実施の形態２にかかる複合型円筒形コイルの外観を示す外観図である。6 is an external view showing an external appearance of a composite cylindrical coil according to a second embodiment; FIG. 実施の形態２にかかる複合型円筒形コイルを構成する導体シートの展開図である。FIG. 6 is a development view of a conductor sheet constituting a composite cylindrical coil according to a second embodiment. 実施の形態２にかかる複合型円筒形コイルを側面から見た平面図である。It is the top view which looked at the composite type cylindrical coil concerning Embodiment 2 from the side surface. 実施の形態３にかかる複合型円筒形コイルを側面から見た平面図である。It is the top view which looked at the composite type cylindrical coil concerning Embodiment 3 from the side surface. 実施の形態３にかかる複合型円筒形コイルを構成する導体シートの展開図である。FIG. 6 is a development view of a conductor sheet constituting a composite cylindrical coil according to a third embodiment. 渦巻き型円筒形コイルの外観を示す外観図である。It is an external view which shows the external appearance of a spiral cylindrical coil. 渦巻き型円筒形コイルを構成する導体シートの展開図である。It is an expanded view of the conductor sheet which comprises a spiral type cylindrical coil.

符号の説明Explanation of symbols

１ 試料管
２ 導電シート
３ 内側リード
４ 外側リード
５ 中空領域
１０ 渦巻きコイル
２０、６０，８０ 複合型円筒形コイル
２１、６１、８１ 第１の円筒形コイル
２２、６２，８２ 第２の円筒形コイル
２３、６３、８３ コイル接続部
２４、２５、６４、６５、８４、８５ 入出力端子
２６ 第１の中空領域
２７ 第２の中空領域
３０、７０、９０ 導体シート
３１、７１、９１ 第１の導体シート
３２、７２，９２ 第２の導体シート
３３、７３、９３ 導体接続シート
３４、３５、７４，７５，９４，９５ 入出力シート
５０ 入出力電流
５１ 接続部電流
５２ 第１の電流
５３ 第２の電流
５４ 入出力電流
６０ 複合型円筒形コイル
７６、７７ 金属板
９６ 第１の傾き
９７ 第２の傾き
９８ 送受信部
９９ 静磁場発生装置
１００ ＮＭＲ装置 DESCRIPTION OF SYMBOLS 1 Sample tube 2 Conductive sheet 3 Inner lead 4 Outer lead 5 Hollow area 10 Spiral coil 20, 60, 80 Composite cylindrical coil 21, 61, 81 First cylindrical coil 22, 62, 82 Second cylindrical coil 23, 63, 83 Coil connection portions 24, 25, 64, 65, 84, 85 Input / output terminal 26 First hollow region 27 Second hollow region 30, 70, 90 Conductor sheets 31, 71, 91 First conductor Sheets 32, 72, 92 Second conductor sheets 33, 73, 93 Conductor connection sheets 34, 35, 74, 75, 94, 95 Input / output sheet 50 Input / output current 51 Connection section current 52 First current 53 Second Current 54 Input / output current 60 Composite cylindrical coil 76, 77 Metal plate 96 First inclination 97 Second inclination 98 Transceiver 99 Static magnetic field generator 100 NMR apparatus

Claims (7)

矩形状の第１の導体シートを、前記第１の導体シートの第１の長軸方向に巻き上げを行い円筒形とし、前記第１の導体シートの第１の短軸方向と直交する前記円筒形の円形断面が渦巻き状態をなし、かつ前記円形断面の中央部分に被検体を裁置する第１の中空領域を有する第１の円筒形コイルと、
矩形状の第２の導体シートを、前記第１の長軸方向と１８０度異なる前記第２の導体シートの第２の長軸方向に巻き上げを行い円筒形とし、前記第２の導体シートの短軸方向を前記第１の短軸方向と一致させ、前記第２の導体シートの短軸方向と直交する前記円筒形の円形断面が渦巻き状態をなし、かつ前記円形断面の中央部分に被検体を裁置する前記第１の中空領域と前記短軸方向に連続する第２の中空領域を有する第２の円筒形コイルと、
前記第１の中空領域に存在する前記第１の導体シートの長軸方向端部および前記第２の中空領域に存在する前記第２の導体シートの長軸方向端部を電気的に接続するコイル接続部と、
前記第１の円筒形コイルの外周部に存在する前記第１の導体シートの長軸方向端部および前記第２の円筒形コイルの外周部に存在する前記第２の導体シートの長軸方向端部に、電気信号の入出力を行う入出力端子と、
を備えるＮＭＲ用複合型円筒形コイル。 The cylindrical first conductor sheet is rolled up in the first major axis direction of the first conductor sheet to form a cylindrical shape, and the cylindrical shape is orthogonal to the first minor axis direction of the first conductor sheet. A first cylindrical coil having a first hollow region in which the circular cross section of the spiral section forms a spiral state, and the subject is placed in a central portion of the circular cross section;
A rectangular second conductor sheet is rolled up in the second major axis direction of the second conductor sheet, which is 180 degrees different from the first major axis direction, to form a cylindrical shape. The cylindrical circular cross section perpendicular to the short axis direction of the second conductor sheet has a spiral state with the axial direction coinciding with the first short axis direction, and the subject is placed at the center of the circular cross section. A second cylindrical coil having the first hollow region to be placed and the second hollow region continuous in the minor axis direction;
A coil for electrically connecting a long-axis direction end of the first conductor sheet existing in the first hollow region and a long-axis direction end of the second conductor sheet existing in the second hollow region A connection,
Long-axis direction end of the first conductor sheet existing on the outer peripheral portion of the first cylindrical coil and long-axis direction end of the second conductor sheet existing on the outer peripheral portion of the second cylindrical coil Input and output terminals for inputting and outputting electrical signals,
A composite cylindrical coil for NMR. 前記第１の導体シート、前記第２の導体シート、前記コイル接続部および前記入出力端子は、一枚の導体パターンで形成されることを特徴とする請求項１に記載のＮＭＲ用複合型円筒形コイル。   2. The NMR composite cylinder according to claim 1, wherein the first conductor sheet, the second conductor sheet, the coil connection portion, and the input / output terminal are formed of a single conductor pattern. Coil. 前記導体パターンは、前記コイル接続部に長軸方向端部を有し、かつ前記コイル接続部を中央とする対称方向に短軸および長軸が位置する矩形状の第１および第２の導体シートを備えることを特徴とする請求項２に記載のＮＭＲ用複合型円筒形コイル。   The said conductor pattern has a long-axis direction edge part in the said coil connection part, and the rectangular-shaped 1st and 2nd conductor sheet in which a short axis and a long axis are located in the symmetrical direction centering on the said coil connection part The composite cylindrical coil for NMR according to claim 2, comprising: 前記入出力端子は、前記第１および第２の導体シートの前記コイル接続部が存在しない側の長軸方向端部に、前記第１および第２の導体シート、並びに、前記コイル接続部を含む短軸方向の長さを有する金属板を備えることを特徴とする請求項３に記載のＮＭＲ用複合型円筒形コイル。   The input / output terminal includes the first and second conductor sheets, and the coil connection portion at a longitudinal end portion of the first and second conductor sheets on the side where the coil connection portion does not exist. The composite cylindrical coil for NMR according to claim 3, further comprising a metal plate having a length in the minor axis direction. 前記入出力端子は、前記第１および第２の導体シートの金属板の板面を、平行配置することを特徴とする請求項４に記載のＮＭＲ用複合型円筒形コイル。   5. The NMR composite cylindrical coil according to claim 4, wherein the input / output terminals are arranged in parallel with the metal plate surfaces of the first and second conductor sheets. 前記第１の導体シートおよび前記第２の導体シートは、前記第１の円筒形コイルおよび前記第２の円筒形コイルが対向する側の辺縁部に、前記コイル接続部からの距離に比例して前記短軸方向の前記第１および第２の導体シートの長さを短くする傾きを備えることを特徴とする請求項１ないし５のいずれか１つに記載のＮＭＲ用複合型円筒形コイル。   The first conductor sheet and the second conductor sheet are in proportion to the distance from the coil connecting portion to the edge portion on the side where the first cylindrical coil and the second cylindrical coil are opposed to each other. 6. The NMR-compound cylindrical coil according to claim 1, further comprising an inclination that shortens the length of the first and second conductor sheets in the minor axis direction. 前記第１および第２の導体シートは、前記第１の長軸方向および前記第２の長軸方向に、前記円形断面の外円周長さの２倍を越える長さを備えることを特徴とする請求項１ないし６のいずれか１つに記載のＮＭＲ用複合型円筒形コイル。   The first and second conductor sheets have a length in the first major axis direction and the second major axis direction that is more than twice the outer circumferential length of the circular cross section. The composite cylindrical coil for NMR according to any one of claims 1 to 6.
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