JP2006026076A5 - - Google Patents

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JP2006026076A5
JP2006026076A5 JP2004208754A JP2004208754A JP2006026076A5 JP 2006026076 A5 JP2006026076 A5 JP 2006026076A5 JP 2004208754 A JP2004208754 A JP 2004208754A JP 2004208754 A JP2004208754 A JP 2004208754A JP 2006026076 A5 JP2006026076 A5 JP 2006026076A5
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body motion
magnetic resonance
body movement
main measurement
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JP2006026076A (en
JP4558397B2 (en
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被検体に所定のパルスシーケンスに従い高周波磁場パルス及び傾斜磁場パルスを印加し、被検体が発生する核磁気共鳴信号を計測し、被検体の画像を撮像する撮像手段と、前記撮像手段を制御する制御手段とを備えた磁気共鳴イメージング装置において、
前記制御手段は、
前記被検体の周期的体動を体動関数又は体動曲線として記憶する手段、及び
被検体を撮像する本計測に先立って取得したナビゲーターエコーから体動位置を検出し、検出された位置と前記体動関数又は体動曲線から本計測時の体動位置を予測し、予測された体動位置に基づき本計測における撮影パラメータを決定する手段、
を備えたことを特徴とする磁気共鳴イメージング装置。 An imaging means for applying a high-frequency magnetic field pulse and a gradient magnetic field pulse to a subject according to a predetermined pulse sequence, measuring a nuclear magnetic resonance signal generated by the subject, and taking an image of the subject, and a control for controlling the imaging means A magnetic resonance imaging apparatus comprising:
The control means includes
Means for storing the periodic body motion of the subject as a body motion function or body motion curve, and detecting the body motion position from navigator echo acquired prior to the main measurement for imaging the subject, and the detected position and the Means for predicting the body movement position at the time of the main measurement from the body movement function or the body movement curve, and determining imaging parameters in the main measurement based on the predicted body movement position;
A magnetic resonance imaging apparatus comprising: 被検体に所定のパルスシーケンスに従い高周波磁場パルス及び傾斜磁場パルスを印加し、被検体が発生する核磁気共鳴信号を計測し、被検体の画像を撮像する撮像手段と、前記撮像手段を制御する制御手段とを備えた磁気共鳴イメージング装置において、
前記制御手段は、
前記被検体の周期的体動を体動関数又は体動曲線として記憶する手段、及び
被検体を撮像する本計測に先立って取得したナビゲーターエコーから体動位置を検出し、検出された位置と前記体動関数又は体動曲線から本計測時の体動位置を予測し、予測された体動位置に基づき本計測における撮像スライス位置及び／又は位相エンコード量を決定する手段、
を備えたことを特徴とする磁気共鳴イメージング装置。 An imaging means for applying a high-frequency magnetic field pulse and a gradient magnetic field pulse to a subject according to a predetermined pulse sequence, measuring a nuclear magnetic resonance signal generated by the subject, and taking an image of the subject, and a control for controlling the imaging means A magnetic resonance imaging apparatus comprising:
The control means includes
Means for storing the periodic body motion of the subject as a body motion function or body motion curve, and detecting a body motion position from a navigator echo acquired prior to the main measurement for imaging the subject, and the detected position and the Means for predicting the body movement position at the time of the main measurement from the body movement function or the body movement curve, and determining the imaging slice position and / or the phase encoding amount in the main measurement based on the predicted body movement position;
A magnetic resonance imaging apparatus comprising: 前記制御手段は、前記予測された体動位置が複数あるとき、予め設定した基準位置との差が大きい体動位置ではｋ空間高周波域の位相エンコードとし、前記基準位置との差が小さい体動位置ではｋ空間高周波域の位相エンコードとすることを特徴とする請求項２に記載の磁気共鳴イメージング装置。   When there are a plurality of predicted body movement positions, the control means performs phase encoding in a k-space high frequency region at a body movement position having a large difference from a preset reference position, and a body movement having a small difference from the reference position. The magnetic resonance imaging apparatus according to claim 2, wherein the position is a phase encoding of a k-space high frequency region. 前記制御手段は、データ取得時間以外の時間にナビゲーターエコーを取得し、当該ナビゲーターエコーによって新たに検出された体動情報に基づき現在の体動関数又は体動曲線を更新することを特徴とする請求項１ないし3いずれか1項に記載の磁気共鳴イメージング装置。   The control means acquires a navigator echo at a time other than the data acquisition time, and updates a current body motion function or body motion curve based on body motion information newly detected by the navigator echo. Item 4. The magnetic resonance imaging apparatus according to any one of Items 1 to 3. 前記制御手段は、複数の方向の周期的体動を表す体動関数又は体動関数を備え、
本計測時における複数の方向の体動位置を予測することを特徴とする請求項１ないし４いずれか１項記載の磁気共鳴イメージング装置。 The control means includes a body motion function representing a periodic body motion in a plurality of directions or a body motion function,
The magnetic resonance imaging apparatus according to claim 1, wherein body movement positions in a plurality of directions at the time of the main measurement are predicted. 被検体に所定のパルスシーケンスに従い高周波磁場パルス及び傾斜磁場パルスを印加し、被検体が発生する核磁気共鳴信号を計測し、被検体の画像を撮像する撮像手段と、前記撮像手段を制御する制御手段とを備えた磁気共鳴イメージング装置において、
前記制御手段は、
前記被検体の周期的体動の変位量とスライス位置のシフト量との関係を表すテーブルを記憶する手段、及び
被検体を撮像する本計測の直前に取得したナビゲーターエコーから体動の変位量を検出し、検出された変位量に対応するスライス位置のシフト量を前記テーブルから求め、続いて実行される本計測に求めたシフト量を適用する手段、
を備えたことを特徴とする磁気共鳴イメージング装置。 An imaging means for applying a high-frequency magnetic field pulse and a gradient magnetic field pulse to a subject according to a predetermined pulse sequence, measuring a nuclear magnetic resonance signal generated by the subject, and taking an image of the subject, and a control for controlling the imaging means A magnetic resonance imaging apparatus comprising:
The control means includes
Means for storing a table representing the relationship between the amount of displacement of the periodic body motion of the subject and the amount of shift of the slice position, and the amount of displacement of the body motion from the navigator echo acquired immediately before the main measurement for imaging the subject. Means for detecting and determining the shift amount of the slice position corresponding to the detected displacement amount from the table, and applying the obtained shift amount to the main measurement to be performed subsequently;
A magnetic resonance imaging apparatus comprising:
JP2004208754A 2004-07-15 2004-07-15 Magnetic resonance imaging system Expired - Fee Related JP4558397B2 (en)

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JP2006026076A5 true JP2006026076A5 (en) 2007-08-02
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JP4443079B2 (en) 2001-09-13 2010-03-31 株式会社日立メディコ Magnetic resonance imaging apparatus and RF receiving coil for magnetic resonance imaging apparatus
JP5063039B2 (en) * 2006-06-15 2012-10-31 株式会社日立メディコ Magnetic resonance imaging system
JP2008154887A (en) * 2006-12-26 2008-07-10 Ge Medical Systems Global Technology Co Llc Mri apparatus
JP5097406B2 (en) 2007-01-22 2012-12-12 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー MRI equipment
JP5032156B2 (en) * 2007-03-05 2012-09-26 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー Magnetic resonance imaging apparatus and magnetic resonance imaging method
JP5591545B2 (en) 2010-01-20 2014-09-17 株式会社東芝 Magnetic resonance imaging system
JP5502502B2 (en) * 2010-01-20 2014-05-28 株式会社東芝 Magnetic resonance imaging system
JP4960468B2 (en) * 2010-03-26 2012-06-27 株式会社東芝 Magnetic resonance imaging system
JP5908713B2 (en) * 2011-12-26 2016-04-26 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー Magnetic resonance apparatus and program
JP5555287B2 (en) * 2012-07-23 2014-07-23 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー MRI equipment
WO2014091374A2 (en) * 2012-12-12 2014-06-19 Koninklijke Philips N.V. Motion detection and correction method for magnetic resonance diffusion weighted imaging (dwi)
JP6109598B2 (en) * 2013-02-26 2017-04-05 東芝メディカルシステムズ株式会社 Magnetic resonance imaging system
JP7115847B2 (en) * 2017-12-26 2022-08-09 富士フイルムヘルスケア株式会社 Magnetic resonance imaging system

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JPH05154130A (en) * 1991-12-06 1993-06-22 Hitachi Ltd Body motion artifact eliminating method
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JP4250251B2 (en) * 1999-04-13 2009-04-08 株式会社日立メディコ Magnetic resonance imaging system
JP3967210B2 (en) * 2002-06-27 2007-08-29 株式会社日立メディコ Magnetic resonance imaging system
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