JPS6024831A - Nuclear magnetic resonance detector - Google Patents
Nuclear magnetic resonance detectorInfo
- Publication number
- JPS6024831A JPS6024831A JP58132130A JP13213083A JPS6024831A JP S6024831 A JPS6024831 A JP S6024831A JP 58132130 A JP58132130 A JP 58132130A JP 13213083 A JP13213083 A JP 13213083A JP S6024831 A JPS6024831 A JP S6024831A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- detector
- magnetic field
- resonance detector
- magnetic pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、核磁気共鳴＜ Ｎ ｕｃｌｅａｒ Ｍ ａｇ
ｎｅｔｉｃＲｅｓｏｎａｎｃｅ ；以下これをＮＭｒ（
と呼ぶ）現象を利用して、被検体内における特定原子核
密度分布等を被゛検体外部より知るようにしたＮ Ｍ
Ｒ装置等のＮＭＲ検出器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides nuclear magnetic resonance
neticResonance; Hereinafter this will be referred to as NMr (
NM, which utilizes the phenomenon (called NM) to know the density distribution of specific atomic nuclei inside the subject from outside the subject.
This invention relates to NMR detectors such as R equipment.
従来の診断用ＮＭＲ装置におりるＮ Ｍ Ｒ検出器部分
の構成の一例は第１図で示される。図において、１は一
様静！ｉ場Ｈｏ（この磁場の方向を７方向とする）を発
生さぜるｌ、：めの静磁場用コイル、２は１．ｙ及び×
軸方向に勾配ｖｉｉ場を発生させるための勾配磁場用コ
イル、３は被検体く各二１イルの円筒内に設置される）
に細い周波数スペクトル［のＲ［：パルスを電磁波とし
て与える励磁コイル、４は被検体におけるＮＭＲ仏号を
検出りるための検出＝Ｊコイルある。An example of the configuration of an NMR detector part in a conventional diagnostic NMR apparatus is shown in FIG. In the figure, 1 is uniformly static! The static magnetic field coil 2 generates the i field Ho (the direction of this magnetic field is 7 directions). y and x
Gradient magnetic field coils 3 for generating a gradient field in the axial direction are installed in the cylinders of each 21-Ile to be examined)
There is a narrow frequency spectrum [R[: excitation coil that gives pulses as electromagnetic waves, and 4 is a detection = J coil for detecting the NMR symbol in the subject.
このような従来の検出器においては、各コイル及びその
支持体（図示せｆ）はことごとく被検体を取り囲むが如
く、若しくは少なくども被検体を前後、左右乃至上下か
ら挾むが如（に配置される構造である。これでは、全身
乃至ある特定部位のスライスをｖＡ察するといつｌ（大
規模な′ｇ置としてはいたしかたないとしても、被検体
の体表の如く一部乃至その直下を検査づる目的の場合に
は不向きである。In such conventional detectors, each coil and its support (f in the figure) are arranged so as to completely surround the subject, or at least to sandwich the subject from the front, back, left and right, or above and below. With this structure, when observing a slice of the entire body or a specific part of the body, it is difficult to detect a part of the subject's body surface or just below it. It is not suitable for testing purposes.
一ノｊ、切り出した絹織り片を訂しく検査したいどきに
は、従来はくれ専用の精密な（しかしあＪ：り寸法の大
きくない）主磁界発生装置も使用されているが、これと
ても（ａ極の囲む奥深い狭い場所にサンプルを挿入する
不便さを持っている。又、主１１界Ｈｏのみは大きな全
身用の磁界発生系の中にて実現し、勾配磁場用及び検出
用のコイルのみ小型のブ１コープ状に形成しｌ＝ものを
用い、被検体のあやこしをねらって配置して観測り−る
という手法も実行されている。しかし、これも主磁界発
生が大樹りな構成になっているという欠点をまぬがれな
い。In the past, when it was necessary to accurately inspect cut-out pieces of silk fabric, a precision (but not large) main magnetic field generator was used, but this was extremely difficult. It is inconvenient to insert the sample into a deep and narrow place surrounded by the a-pole.In addition, only the main 11 field Ho is realized in a large whole-body magnetic field generation system, and only the gradient magnetic field and detection coils are used. A method has also been implemented in which the main magnetic field is formed in the shape of a small probe and is placed to aim at the various positions of the object for observation. I can't escape the drawback of being like that.
本発明は、このような点に鑑みてなされたもので、その
目的は、被検体の体表（一部）乃至その直下を検査りる
のに好適で且つ簡単な描或のＮＭＲ検出器を実現するこ
と、具体的には、少なくとも作業用乃至被検体の白山度
１寸法への許容“度のために、半空間は完全に開放とな
っており、有感局所乃至イメージング領域が、ある面上
にあり、その面より手前には全く何ｂ ｂ在１．ないよ
う’ｔＴ ｔｉ’ｓ是のＮ Ｍ Ｒ検出器、換言りれば
一端が開放されＩご探触子面式のＮ Ｍ Ｒ検出器をＨ
ＨＨ供りることにある。The present invention has been made in view of these points, and its purpose is to provide an NMR detector with a simple design and suitable for examining the body surface (part) of a subject or just below it. To achieve this, specifically, at least for working purposes or for tolerance to the Hakusan degree of the subject, the half-space is completely open, and the sensitive locality or imaging area is There is an NMR detector on top, and there is absolutely nothing in front of that surface.In other words, one end is open and the probe surface type NMR R detector to H
It's about offering HH.
このような目的を達成づるための本発明は、ｖＩ７−面
状の磁極面の中央部に球面状の凹みを右し、その中央部
から面に直角な方向に主磁界が生ずる如くに形成された
永久磁石又は電磁石と、前記凹み部分にその表面が前記
磁極面と略一致Ｊ゛るように配設された直交する一対の
＝１イルとを備え、前記一対のコイルの一方を摂動用、
他方をＲＦ及び検出用コイルとして利用するようにした
ことを特徴とづるものである。In order to achieve such an object, the present invention is such that a spherical recess is formed in the center of a vI7-plane magnetic pole surface, and a main magnetic field is generated from the center in a direction perpendicular to the surface. a permanent magnet or an electromagnet; and a pair of orthogonal coils disposed in the recessed portion so that their surfaces substantially coincide with the magnetic pole surface; one of the pair of coils is used for perturbation;
The feature is that the other is used as an RF and detection coil.
以下、図面を用いて本発明の詳細な説明りる。Hereinafter, the present invention will be explained in detail using the drawings.
第２図は本発明のＮＭＲ検出器の主要部を示寸断面図で
ある。この実施例は、永久磁石又は電磁石１゛１の一方
の磁極面Ａ△′に球面状（曲率？４′径が十分に大ぎい
）の凹み１ｉａを設り、この凹み部分に、直交づ゛る一
対のコイル１２，１３．（第３図の正面図参照）をイ］
設し、その表面を磁極面ＡＡ′と略一致させたものであ
る。この一対のコイル、即ら１、Ｘ軸、ｙ＠用のコイル
１２，１３は同等でよく、他に電磁石１１による主磁界
’Ａｏの修正用の円環コイル１４を設けてもよい。FIG. 2 is a sectional view showing the main parts of the NMR detector of the present invention. In this embodiment, a spherical recess 1ia (having a sufficiently large radius of curvature ? 4') is provided on one magnetic pole surface A△' of a permanent magnet or electromagnet 1. A pair of coils 12, 13 . (See the front view in Figure 3)
The surface thereof is made substantially coincident with the magnetic pole surface AA'. This pair of coils, ie, the coils 12 and 13 for 1, the X axis, and y@, may be the same, and an annular coil 14 for correcting the main magnetic field 'Ao by the electromagnet 11 may also be provided.
このような構成に（）３いては、トｔｏをＺ軸方向とし
、磁極面ＡＡ’の外側の部分における、ｘ、ｙ各二イル
１２．１３によるｘ、ｙ軸方向の何れかの方向の磁界を
摂動用と］〈１：用の磁界として用いる。ＲＦ用とした
方のコイルはその後検出用コイルとして用いる。In such a configuration ()3, to is the Z-axis direction, and in the outer part of the magnetic pole face AA', the x and y coils 12.13 are used to determine the direction of either the x or y axis. The magnetic field is used for perturbation and for ]<1:. The coil used for RF is then used as a detection coil.
尚、ｘ、ｙ６二」イル１２．１３は第４図〈イ）及び（
イ）のＢ−Ｂ矢視図である（口）に示す如く、蝶の羽の
如くに聞き、その中央部のみΔΔ′面に二出て他の部分
は凹みの奥の方ｌ＼傾くように配設したものであっても
よい。In addition, x, y62'' Ile 12.13 is shown in Figure 4 (A) and (
As shown in the B-B arrow view of (b), it looks like a butterfly's wing, with only the center part protruding towards the ΔΔ' plane and the other parts tilting towards the back of the recess. It may be arranged in
このような場合の主磁界Ｈｏについて検討し°Ｃみるに
、もし磁極面が無限平面である場合には磁荷分布に比例
したＨ６が第５図に示す如（上向ぎに出現し、又等磁位
面Ｐ１．Ｐ２ 、Ｐｓ 、Ｐ４・・・は磁極面と平行と
なって現われる。Examining the main magnetic field Ho in such a case, we found that if the magnetic pole surface is an infinite plane, H6, which is proportional to the magnetic charge distribution, will appear upward, as shown in Figure 5. Equimagnetic potential surfaces P1, P2, Ps, P4, . . . appear parallel to the magnetic pole surface.
系全体をＺ軸に関し゛Ｃ回転対称とり−ると、２軸上で
はＨｏは必ずＺ軸に平行し、イの強さは×。If the entire system has C rotational symmetry about the Z-axis, Ho is always parallel to the Z-axis on the two axes, and the strength of A is x.
ｙ面に関してはｌ＠上が最大で、１４１極から遠ざかる
につれて単調減少となる。従って、磁極の径が磁極面か
らの距離に比べて十分大であるならば第５図に準じた事
態が実現される。しかし、実際の検出器においては余り
大きくなし得ないため、その中間形態として、第２図（
ロ）に示覆如く、１−１０はＡ△′面の近傍で適度の勾
配を既に自ら有することとなる。ΔＡ′面に近い楊υｉ
でほぞの勾配は緩やかである。但し、円環−Ｊイル１４
に流づ電流を調節することによりその勾配を適宜に打ｉ
ｔ’Ｊ １ことら可能である。Regarding the y-plane, it is maximum on l@, and monotonically decreases as it moves away from the 141 pole. Therefore, if the diameter of the magnetic pole is sufficiently large compared to the distance from the magnetic pole surface, a situation similar to that shown in FIG. 5 will be realized. However, since it cannot be made very large in an actual detector, an intermediate form is shown in Fig. 2 (
As shown in b), 1-10 already has an appropriate slope in the vicinity of the AΔ' plane. Yangυi near the ΔA′ plane
The slope of the tenon is gentle. However, circle-Jil 14
The slope can be adjusted appropriately by adjusting the current flowing through i.
It is possible since t'J 1.
又、Ｈｏの勾配は、これを巧みに利用してイメージング
のための投影データを採取づるために用いることもでき
る。尚、本発明のＮ Ｍ Ｒ検出器を使用し／ｊ場合に
は、イメージングよりもむしろ物質の磁気共鳴の緩和時
間等を測定づる目的に適したものである。Furthermore, the gradient of Ho can also be skillfully used to collect projection data for imaging. Note that when the NMR detector of the present invention is used, it is suitable for the purpose of measuring the relaxation time of magnetic resonance of a substance, etc., rather than for imaging.
第６図は本発明の検出器の支持部分の構成を示す図であ
る。即ち、主支社６１に支持された水平アーム６２の一
端に、水平方向に摺動自在のギヤリッジ６３を取り付け
、そのキ１７リツジ６３に垂直方向に摺動自在な垂直ア
ーム６４を介して検出ｚ：１０を取りイづりる。水平ア
ーム６２の他端にはカウンタバランス６５を取り付り、
キャリッジ部分どのバランスをどるようにするのが望ま
しい。FIG. 6 is a diagram showing the structure of the support portion of the detector of the present invention. That is, a horizontally slidable gear ridge 63 is attached to one end of a horizontal arm 62 supported by the main branch 61, and a vertical arm 64 that is vertically slidable is attached to the gear ridge 63 to detect z: Take 10 and write it down. A counterbalance 65 is attached to the other end of the horizontal arm 62,
It is desirable to balance the carriage part in a certain way.
このような検出器支持４１へ成をとることによって患者
ベッド６６及び患者６７の位置や大きさに自由度を持た
せることができ、位同決め等の操作は極め１容易となる
。By forming the detector support 41 in this manner, the position and size of the patient bed 66 and the patient 67 can be given a degree of freedom, and operations such as position determination become extremely easy.
尚、主磁界Ｎ ｏを発生りる電磁石としては、第７図に
示寸ように、電磁軟鉄ブロック７１の中間部分に磁化コ
イル（円環状）７２を埋設し、これに直流電流を流して
、磁極面ＡΔ′にＮ極とＳ極が４１するように形成した
ものでもよい。As an electromagnet for generating the main magnetic field No, a magnetizing coil (circular) 72 is buried in the middle part of an electromagnetic soft iron block 71, as shown in FIG. 7, and a direct current is passed through it. The magnetic pole surface AΔ' may be formed with 41 N poles and 41 S poles.
尚、又、ｘ、ｙコイルは一方を摂動用としたときには他
方を検出用コイルとして利用Ｊ−る。Furthermore, when one of the x and y coils is used for perturbation, the other is used as a detection coil.
以上説明したよ−うに、本発明によれば、一端か開放さ
れた探触子面式の簡単な構造のＮＭＲ検出器を実現でき
、被検体に対して表面部のＮＭＲの緩和時間等を測定す
るのに好適である。又、このような検出器によれば、被
検体表面に検出器を当接づるだ番ブでよいから、その操
作は極めて容易であり、従来の如く筒の奥深い所に被検
体を設置りるような面倒さは全くなくなり、その効果は
大きい。As explained above, according to the present invention, it is possible to realize an NMR detector with a simple structure of a probe surface type with one end open, and to measure the NMR relaxation time etc. of the surface part of the object. It is suitable for In addition, with this type of detector, the operation is extremely easy because it is only necessary to place the detector against the surface of the specimen, and the operation is extremely easy. Such troubles are completely eliminated, and the effect is great.
第１図は従来のＮ Ｍ Ｒ装置の検出器の一例を示す構
成図、第２図及び第３図は本発明の検出器の一実施例を
示す説明図、第４図はｘ、ｙ二１イルの他の実施例を示
す説明図、第５図は主磁界の様子を示す説明図、第６図
は検出器支持機構を示１図、第７図は電磁石の実施例を
示づ４１４成図である。
１１・・・永久磁石又は電磁石
１２．１３・・・ｘ、ｙ方向コイル
１４・・・円環コイル ６１・・・主支柱６２・・・水
平アーム ６３・・・ギヤリッジ０４・・・垂直アーム
６５・・・カウンタバランス６６・・・患者ベッド
６７・・・患者第５図
Ａ−づ ←Ａ′
Ｎ Ｎ、Ｎ ＮＮＮＮ Ｎ
第６図
第７図
Ｈ。FIG. 1 is a configuration diagram showing an example of a detector of a conventional NMR apparatus, FIGS. 2 and 3 are explanatory diagrams showing an embodiment of the detector of the present invention, and FIG. Figure 5 is an explanatory diagram showing the state of the main magnetic field, Figure 6 shows the detector support mechanism, Figure 7 shows an example of the electromagnet. It is a complete drawing. 11... Permanent magnet or electromagnet 12.13... x, y direction coil 14... circular coil 61... main column 62... horizontal arm 63... gear ridge 04... vertical arm 65 ...Counter balance 66...Patient bed
67...Patient Figure 5 A-zu ←A' N N, N NNNN N Figure 6 Figure 7 H.
Claims (2)
その中央部から面に直角な方向に主磁界が生ずる如くに
形成された永久に１石又は？Ｕ両磁石、前記凹み部分に
その表面が前記磁極面ど略一致するように配設された直
交ザる−え１のコイルとを備え、前記−ス・ｊのコイル
の一方を摂動用、他方をｒ＜ Ｆ及び検出用コイルとし
て利用覆るようにした核磁気共鳴検出器。(1) Having a spherical recess in the center of the planar magnetic pole surface,
A permanent stone or ? Both U magnets are provided with a coil of orthogonal ZAR-1 disposed in the recessed portion so that its surface substantially coincides with the magnetic pole surface, one of the coils of S-J is used for perturbation, and the other is used for perturbation. A nuclear magnetic resonance detector in which r < F and used as a detection coil.
、該円環コイルにて主磁界を調節できるように構成した
ことを特徴とする特許請求の範囲第１項記載の核磁気共
鳴検出器。(2) The nuclear magnetism according to claim 1, wherein the recessed portion has a circular coil for modifying the main magnetic field, and the circular coil is configured to adjust the main magnetic field. Resonance detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58132130A JPS6024831A (en) | 1983-07-20 | 1983-07-20 | Nuclear magnetic resonance detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58132130A JPS6024831A (en) | 1983-07-20 | 1983-07-20 | Nuclear magnetic resonance detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6024831A true JPS6024831A (en) | 1985-02-07 |
| JPH0248251B2 JPH0248251B2 (en) | 1990-10-24 |
Family
ID=15074088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58132130A Granted JPS6024831A (en) | 1983-07-20 | 1983-07-20 | Nuclear magnetic resonance detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6024831A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61154556U (en) * | 1985-03-15 | 1986-09-25 | ||
| JPS63143046A (en) * | 1986-11-27 | 1988-06-15 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Magnetic imaging apparatus having orthogonal coil system |
| JPS6420834A (en) * | 1987-03-19 | 1989-01-24 | Oreal | Apparatus for examining examinee |
| JPH021239A (en) * | 1987-10-30 | 1990-01-05 | Univ California | Adjustable holder for rf surface coil for magnetic resonance image processing |
| JPH0779954A (en) * | 1993-02-01 | 1995-03-28 | Panacea Medical Lab | Device for nuclear magnetic resonance image pickup, which can be aligned from remote location |
| US6091241A (en) * | 1996-10-01 | 2000-07-18 | L'oreal | Device for examining a volume of small depth by nuclear magnetic resonance |
| JP2022163132A (en) * | 2019-03-25 | 2022-10-25 | プロマクソ インコーポレイテッド | Single-sided fast mri gradient field coils and applications thereof |
-
1983
- 1983-07-20 JP JP58132130A patent/JPS6024831A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61154556U (en) * | 1985-03-15 | 1986-09-25 | ||
| JPS63143046A (en) * | 1986-11-27 | 1988-06-15 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Magnetic imaging apparatus having orthogonal coil system |
| JPS6420834A (en) * | 1987-03-19 | 1989-01-24 | Oreal | Apparatus for examining examinee |
| JPH1057347A (en) * | 1987-03-19 | 1998-03-03 | L'oreal Sa | Device for forming magnetic gradient |
| JPH021239A (en) * | 1987-10-30 | 1990-01-05 | Univ California | Adjustable holder for rf surface coil for magnetic resonance image processing |
| JPH0779954A (en) * | 1993-02-01 | 1995-03-28 | Panacea Medical Lab | Device for nuclear magnetic resonance image pickup, which can be aligned from remote location |
| US6091241A (en) * | 1996-10-01 | 2000-07-18 | L'oreal | Device for examining a volume of small depth by nuclear magnetic resonance |
| JP2022163132A (en) * | 2019-03-25 | 2022-10-25 | プロマクソ インコーポレイテッド | Single-sided fast mri gradient field coils and applications thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0248251B2 (en) | 1990-10-24 |
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