JP2002272702A5 - - Google Patents
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- JP2002272702A5 JP2002272702A5 JP2001076217A JP2001076217A JP2002272702A5 JP 2002272702 A5 JP2002272702 A5 JP 2002272702A5 JP 2001076217 A JP2001076217 A JP 2001076217A JP 2001076217 A JP2001076217 A JP 2001076217A JP 2002272702 A5 JP2002272702 A5 JP 2002272702A5
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- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic resonance
- slice
- slices
- control means
- Prior art date
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- 238000002595 magnetic resonance imaging Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 210000004940 Nucleus Anatomy 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 210000001519 tissues Anatomy 0.000 description 2
Description
【特許請求の範囲】
【請求項１】
静磁場発生手段と、スライスエンコード、位相エンコード、周波数エンコードの各方向の傾斜磁場を発生する傾斜磁場発生手段と、被検体の組織を構成する原子核を励起して磁気共鳴を生じさせる高周波磁場を発生する送信手段と、磁気共鳴による被検体からのＮＭＲ信号を検出する受信手段と、前記受信手段で検出したＮＭＲ信号を用いて画像を再構成する信号処理手段と、前記傾斜磁場及び高周波磁場を所定のシーケンスにて印加すると共に前記各手段を制御する制御手段とを備えて成る磁気共鳴イメージング装置において、前記制御手段は、１回または数回のシーケンスの実行により複数のスライスを撮像するよう制御すると共に、ゲイン調整に必要な前計測を前記複数のスライスのうち所定のスライス位置に対してのみ行なうことを特徴とした磁気共鳴イメージング装置。
【請求項２】
前記制御手段は、前記前計測を前記複数のスライスのうち所定の間隔をおいたスライス位置に対して行なうと共に、前記所定の間隔をスライス間隔単位で設定することを特徴とする磁気共鳴イメージング装置。
[Claims]
[Claim 1]
A static magnetic field generating means, a gradient magnetic field generating means that generates a gradient magnetic field in each direction of slice encoding, phase encoding, and frequency encoding, and a high-frequency magnetic field that excites the nuclei constituting the tissue of the subject to generate magnetic resonance. A transmitting means for detecting an NMR signal from a subject due to magnetic resonance, a signal processing means for reconstructing an image using the NMR signal detected by the receiving means, and a gradient magnetic field and a high-frequency magnetic field are predetermined. In a magnetic resonance imaging apparatus including a control means for controlling each of the means while applying in the sequence of the above, the control means controls to image a plurality of slices by executing one or several sequences. At the same time, a magnetic resonance imaging apparatus characterized in that pre-measurement required for gain adjustment is performed only at a predetermined slice position among the plurality of slices.
2.
The control means is a magnetic resonance imaging apparatus characterized in that the pre-measurement is performed on slice positions at predetermined intervals among the plurality of slices, and the predetermined intervals are set in slice interval units.
【０００８】
【課題を解決するための手段】上記目的を達成するために、本発明は静磁場発生手段と、スライスエンコード、位相エンコード、周波数エンコードの各方向の傾斜磁場を発生する傾斜磁場発生手段と、被検体の組織を構成する原子核を励起して磁気共鳴を生じさせる高周波磁場を発生する送信手段と、磁気共鳴による被検体からのＮＭＲ信号を検出する受信手段と、前記受信手段で検出したＮＭＲ信号を用いて画像を再構成する信号処理手段と、前記傾斜磁場及び高周波磁場を所定のシーケンスにて印加すると共に前記各手段を制御する制御手段とを備えて成る磁気共鳴イメージング装置において、前記制御手段は、１回または数回のシーケンスの実行により複数のスライスを撮像するよう制御すると共に、ゲイン調整に必要な前計測を前記複数のスライスのうち所定のスライス位置に対してのみ行なうようにしたものである。また、前記制御手段は、前記前計測を前記複数のスライスのうち所定の間隔をおいたスライス位置に対して行なうと共に、前記所定の間隔をスライス間隔単位で設定するようにしてもよい。
0008
[Means for Solving the Problems] In order to achieve the above object, the present invention includes a static magnetic resonance generating means, a gradient magnetic resonance generating means for generating a gradient magnetic field in each direction of slice encoding, phase encoding, and frequency encoding, and a gradient magnetic field generating means. A transmitting means that generates a high-frequency magnetic field that excites the nuclei constituting the tissue of the sample to generate magnetic resonance, a receiving means that detects an NMR signal from the subject due to magnetic resonance, and an NMR signal detected by the receiving means. In a magnetic resonance imaging apparatus comprising a signal processing means for reconstructing an image using the means and a control means for applying the gradient magnetic field and the high frequency magnetic field in a predetermined sequence and controlling each of the means, the control means is used. It is controlled to image a plurality of slices by executing one or several sequences, and the pre-measurement required for gain adjustment is performed only at a predetermined slice position among the plurality of slices. is there. Further, the control means may perform the pre-measurement on the slice positions of the plurality of slices at predetermined intervals, and may set the predetermined intervals in slice interval units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001076217A JP4822379B2 (en) | 2001-03-16 | 2001-03-16 | Magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001076217A JP4822379B2 (en) | 2001-03-16 | 2001-03-16 | Magnetic resonance imaging system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2002272702A JP2002272702A (en) | 2002-09-24 |
| JP2002272702A5 true JP2002272702A5 (en) | 2008-03-21 |
| JP4822379B2 JP4822379B2 (en) | 2011-11-24 |
Family
ID=18933190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001076217A Expired - Fee Related JP4822379B2 (en) | 2001-03-16 | 2001-03-16 | Magnetic resonance imaging system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4822379B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002336213A (en) * | 2001-05-08 | 2002-11-26 | Ge Medical Systems Global Technology Co Llc | Mri apparatus adjusting method and mri apparatus |
| JP6552804B2 (en) | 2013-12-17 | 2019-07-31 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6382640A (en) * | 1986-09-29 | 1988-04-13 | 株式会社東芝 | Adjustment of magnetic resonance imaging apparatus |
| JPH04329929A (en) * | 1991-04-30 | 1992-11-18 | Shimadzu Corp | Mr imaging system |
| JPH0838445A (en) * | 1994-07-31 | 1996-02-13 | Shimadzu Corp | Nuclear magnetic resonance inspecting device |
| JP3526337B2 (en) * | 1995-01-20 | 2004-05-10 | 株式会社東芝 | Magnetic resonance imaging system |
| JP2000152920A (en) * | 1998-11-20 | 2000-06-06 | Ge Yokogawa Medical Systems Ltd | Mr imaging method and device |
-
2001
- 2001-03-16 JP JP2001076217A patent/JP4822379B2/en not_active Expired - Fee Related
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