JP2015134017A5 - - Google Patents
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- JP2015134017A5 JP2015134017A5 JP2014005964A JP2014005964A JP2015134017A5 JP 2015134017 A5 JP2015134017 A5 JP 2015134017A5 JP 2014005964 A JP2014005964 A JP 2014005964A JP 2014005964 A JP2014005964 A JP 2014005964A JP 2015134017 A5 JP2015134017 A5 JP 2015134017A5
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- coil
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- magnetic field
- coils
- gradient magnetic
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- 238000002595 magnetic resonance imaging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Description
この発明は、傾斜磁場を発生する複数のメインコイルと、メインコイルによる漏れ磁場を防ぐ複数のシールドコイルとを有する傾斜磁場コイル装置、及びその傾斜磁場コイル装置を用いた磁気共鳴イメージング（MRI: Magnetic Resonance Imaging）装置に関するものである。
The present invention relates to a gradient coil device having a plurality of main coils for generating a gradient magnetic field and a plurality of shield coils for preventing a leakage magnetic field by the main coil, and magnetic resonance imaging ( MRI: Magnetic) using the gradient coil device Resonance Imaging) apparatus.
このため、傾斜磁場コイル装置の周方向におけるＸ接続部及びＹ接続部の位置が制限され、シールドコイルの長さを短くする効果も少なくなり、ローレンツ力の低下も限定的になる。
For this reason, the position of the X connection part and the Y connection part in the circumferential direction of the gradient magnetic field coil device is limited, the effect of shortening the length of the shield coil is reduced, and the reduction of the Lorentz force is also limited.
傾斜磁場コイル装置本体２１の壁部内には、Ｘ、Ｙ及びＺの３軸方向の傾斜磁場を発生する傾斜磁場コイルである複数のメインＸコイル２４、複数のメインＹコイル２５及びメインＺコイル２６が配置されている。
A plurality of main X coils 24, a plurality of main Y coils 25, and a main Z coil 26, which are gradient magnetic field coils that generate gradient magnetic fields in three axial directions of X, Y, and Z, are disposed in the wall portion of the gradient magnetic field coil device main body 21. Is arranged.
図２では、これらのメインコイル（傾斜磁場コイル）２４〜２６をまとめて示している。また、これらのメインコイル２４〜２６は、全体として楕円筒形をなすように配置されている。
In FIG. 2, these main coils (gradient magnetic field coils) 24-26 are shown collectively. Further, these main coils 24 to 26 are arranged so as to form an elliptic cylinder as a whole.
図２では、これらのシールドコイル（傾斜磁場コイル）２７〜２９をまとめて示している。また、シールドコイル２７〜２９は、全体して、メインコイル２４〜２６を囲繞する円筒形をなすように配置されている。
In FIG. 2, these shield coils (gradient magnetic field coils) 27 to 29 are collectively shown. The shield coils 27 to 29 are arranged so as to form a cylindrical shape surrounding the main coils 24 to 26 as a whole.
このような傾斜磁場コイル装置３及びそれを用いた磁気共鳴イメージング装置では、傾斜磁場コイル２４〜２９が、傾斜磁場コイル装置本体２１の径方向中心側から径方向外側へ向けて、メインＸコイル２４、メインＹコイル２５、メインＺコイル２６、シールドＺコイル２９、シールドＹコイル２８、シールドＸコイル２７の順に配置されており、Ｘ接続部３１及びＹ接続部３２が傾斜磁場コイル装置本体２１の軸方向に互いにずらして配置されているので、Ｘ接続部３１及びＹ接続部３２を傾斜磁場コイル装置本体２１の周方向の同じ位置に、互いに干渉することなく配置することができる。
In such a gradient magnetic field coil apparatus 3 and a magnetic resonance imaging apparatus using the gradient magnetic field coil apparatus 3, the gradient magnetic field coils 24 to 29 are arranged so that the main X coil 24 extends from the radial center side of the gradient magnetic field coil apparatus body 21 toward the radial outer side. The main Y coil 25, the main Z coil 26, the shield Z coil 29, the shield Y coil 28, and the shield X coil 27 are arranged in this order, and the X connection portion 31 and the Y connection portion 32 are the axes of the gradient coil device body 21. Since they are arranged so as to be shifted from each other in the direction, the X connection part 31 and the Y connection part 32 can be arranged at the same position in the circumferential direction of the gradient magnetic field coil device main body 21 without interfering with each other.
３ 傾斜磁場コイル装置、２１ 傾斜磁場コイル装置本体、２３ シムトレイ収容部、２４ メインＸコイル、２５ メインＹコイル、２６ メインＺコイル、２７ シールドＸコイル、２８ シールドＹコイル、２９ シールドＺコイル、３１ Ｘ接続部、３２ Ｙ接続部、３３ Ｚ接続部。
3 Gradient Magnetic Field Coil Device, 21 Gradient Magnetic Field Coil Device Main Body, 23 Shim Tray Housing, 24 Main X Coil, 25 Main Y Coil, 26 Main Z Coil, 27 Shield X Coil, 28 Shield Y Coil, 29 Shield Z Coil, 31 X Connection part, 32 Y connection part , 33 Z connection part .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014005964A JP2015134017A (en) | 2014-01-16 | 2014-01-16 | Gradient magnetic field coil device and magnetic resonance imaging apparatus using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014005964A JP2015134017A (en) | 2014-01-16 | 2014-01-16 | Gradient magnetic field coil device and magnetic resonance imaging apparatus using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015134017A JP2015134017A (en) | 2015-07-27 |
| JP2015134017A5 true JP2015134017A5 (en) | 2017-02-23 |
Family
ID=53766388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014005964A Ceased JP2015134017A (en) | 2014-01-16 | 2014-01-16 | Gradient magnetic field coil device and magnetic resonance imaging apparatus using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2015134017A (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884716A (en) * | 1994-09-16 | 1996-04-02 | Toshiba Corp | Gradient magnetic field coil |
| DE19849731C1 (en) * | 1998-10-28 | 2000-04-13 | Siemens Ag | Active screened transversal gradient coil arrangement for NMR unit |
| JP5204813B2 (en) * | 2010-08-06 | 2013-06-05 | 株式会社日立メディコ | Gradient magnetic field coil and magnetic resonance imaging apparatus |
| JP5536429B2 (en) * | 2009-12-07 | 2014-07-02 | 株式会社日立メディコ | Magnetic resonance imaging apparatus and magnetic field homogeneity adjustment method of the apparatus |
| JP5819215B2 (en) * | 2012-02-17 | 2015-11-18 | 株式会社日立メディコ | Gradient magnetic field coil and magnetic resonance imaging apparatus |
-
2014
- 2014-01-16 JP JP2014005964A patent/JP2015134017A/en not_active Ceased
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