JP2006000265A5 - - Google Patents

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JP2006000265A5
JP2006000265A5 JP2004177904A JP2004177904A JP2006000265A5 JP 2006000265 A5 JP2006000265 A5 JP 2006000265A5 JP 2004177904 A JP2004177904 A JP 2004177904A JP 2004177904 A JP2004177904 A JP 2004177904A JP 2006000265 A5 JP2006000265 A5 JP 2006000265A5
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imaging apparatus
resonance imaging
magnetic resonance
magnetic field
measurement control
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JP2004177904A
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JP2006000265A (en
JP4651315B2 (en
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Claims (9)

静磁場空間に配置された被検体の複数のスライスをそれぞれ撮影するための撮影シーケンスを制御する計測制御手段と、前記撮影シーケンスに基づいて取得されたエコー信号を用いて前記被検体の画像を再構成する信号処理手段を備え、
前記撮影シーケンスは、前記被検体の脂肪組織からのエコー信号を抑制するための脂肪抑制パルスを生成する脂肪抑制ブロックと、前記被検体から画像用のエコー信号を取得する画像用信号取得ブロックと、を有して成る磁気共鳴イメージング装置において、
前記撮影シーケンスは、前記静磁場不均一分布を求めるためのエコー信号を取得する静磁場不均一用信号取得ブロックを有し、
前記信号処理手段は、前記静磁場不均一用信号取得ブロックで取得されたエコー信号を用いて前記静磁場不均一分布を求め、
前記計測制御手段は、前記信号処理手段で求められた前記静磁場不均一分布に対応して前記脂肪抑制パルスを制御することを特徴とする磁気共鳴イメージング装置。
A measurement control means for controlling an imaging sequence for imaging each of a plurality of slices of the subject arranged in the static magnetic field space, and an echo signal acquired based on the imaging sequence are used to reproduce the image of the subject. Comprising signal processing means to configure,
The imaging sequence includes a fat suppression block for generating a fat suppression pulse for suppressing an echo signal from the fat tissue of the subject, an image signal acquisition block for acquiring an echo signal for an image from the subject, In a magnetic resonance imaging apparatus comprising :
The imaging sequence has a static magnetic field inhomogeneous signal acquisition block for acquiring an echo signal for obtaining the static magnetic field inhomogeneous distribution ,
The signal processing means obtains the static magnetic field inhomogeneous distribution using the echo signal acquired by the static magnetic field inhomogeneous signal acquisition block,
The magnetic resonance imaging apparatus characterized in that the measurement control means controls the fat suppression pulse corresponding to the static magnetic field non-uniform distribution obtained by the signal processing means .
請求項１に記載の磁気共鳴イメージング装置において、
前記静磁場不均一用信号取得ブロックの読み出し傾斜磁場はスライス方向に印加されるものであり、
前記信号処理手段は、スライス位置毎の静磁場不均一分布を求め、
前記計測制御手段は、前記スライス位置毎の静磁場不均一分布に対応して、前記脂肪抑制パルスを制御することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 1.
The readout gradient magnetic field of the static magnetic field inhomogeneity signal acquisition block is applied in the slice direction,
The signal processing means obtains a static magnetic field inhomogeneous distribution for each slice position,
The magnetic resonance imaging apparatus , wherein the measurement control unit controls the fat suppression pulse corresponding to a static magnetic field inhomogeneous distribution for each slice position .
請求項２に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、前記スライス方向に印加する読み出し傾斜磁場の極性を反転させて、複数のエコー信号を取得し、
前記信号処理手段は、前記複数のエコー信号の各々のフーリエ変換後の位相差分に基づいて、前記スライス位置毎の静磁場不均一分布を求めることを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 2.
The measurement control means inverts the polarity of the readout gradient magnetic field applied in the slice direction to obtain a plurality of echo signals,
The magnetic resonance imaging apparatus characterized in that the signal processing means obtains a static magnetic field inhomogeneous distribution for each slice position based on a phase difference after Fourier transform of each of the plurality of echo signals .
請求項２又は３に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、スライス毎に前記脂肪抑制パルスを印加することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 2 or 3 ,
The magnetic resonance imaging apparatus , wherein the measurement control unit applies the fat suppression pulse for each slice .
請求項２又は３に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、２以上のスライスに一括して前記脂肪抑制パルスを印加することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 2 or 3,
The magnetic resonance imaging apparatus, wherein the measurement control unit applies the fat suppression pulse to two or more slices at once.
請求項５に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、前記脂肪抑制ブロックを、前記複数のスライスの数より少ない回数だけ実行することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 5.
The magnetic resonance imaging apparatus characterized in that the measurement control means executes the fat suppression block a number of times less than the number of the plurality of slices.
請求項１に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、前記静磁場不均一用信号取得ブロックを、前記複数のスライスの数より少ない回数だけ実行することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to claim 1.
The magnetic resonance imaging apparatus, wherein the measurement control unit executes the static magnetic field inhomogeneity signal acquisition block a number of times less than the number of the plurality of slices.
請求項１乃至７のいずれか一項に記載の磁気共鳴イメージング装置において、
前記計測制御手段は、前記脂肪抑制パルスが印加されるスライスにおける前記静磁場不均一に対応して、該脂肪抑制パルスの中心周波数を設定することを特徴とする磁気共鳴イメージング装置。
The magnetic resonance imaging apparatus according to any one of claims 1 to 7,
The measurement control means sets the center frequency of the fat saturation pulse corresponding to the static magnetic field inhomogeneity in the slice to which the fat saturation pulse is applied.
請求項１乃至８のいずれか一項に記載の磁気共鳴イメージング装置において、
前記被検体を載置して前記静磁場空間内で移動させる移動手段を備え、
前記計測制御手段は、前記被検体を複数の領域に分割して、前記移動手段の領域間のステップ移動と、前記撮影シーケンスを用いた領域毎の撮影と、を繰り返すことを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to any one of claims 1 to 8,
A moving means for placing the subject and moving it in the static magnetic field space;
The measurement control unit divides the subject into a plurality of regions and repeats step movement between the regions of the moving unit and imaging for each region using the imaging sequence. Imaging device.
JP2004177904A 2004-06-16 2004-06-16 Magnetic resonance imaging system Expired - Fee Related JP4651315B2 (en)

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JP2004177904A JP4651315B2 (en) 2004-06-16 2004-06-16 Magnetic resonance imaging system

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JP2004177904A JP4651315B2 (en) 2004-06-16 2004-06-16 Magnetic resonance imaging system

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JP2006000265A JP2006000265A (en) 2006-01-05
JP2006000265A5 true JP2006000265A5 (en) 2007-07-26
JP4651315B2 JP4651315B2 (en) 2011-03-16

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JP4685496B2 (en) * 2005-04-11 2011-05-18 株式会社日立メディコ Magnetic resonance imaging system
JP5075344B2 (en) * 2006-03-16 2012-11-21 株式会社東芝 MRI apparatus and image display apparatus
DE102006061177B4 (en) * 2006-12-22 2009-04-02 Siemens Ag 3D MR imaging with fat suppression
JP5366484B2 (en) * 2007-09-28 2013-12-11 株式会社東芝 Magnetic resonance imaging apparatus and analysis method of fat suppression effect in the magnetic resonance imaging apparatus
JP5212972B2 (en) * 2007-12-28 2013-06-19 学校法人慶應義塾 Measuring device and measuring method
JP6184050B2 (en) * 2010-07-02 2017-08-23 東芝メディカルシステムズ株式会社 Magnetic resonance imaging system
JP5433738B2 (en) * 2012-07-10 2014-03-05 株式会社東芝 Image display device
JP7237460B2 (en) * 2018-05-11 2023-03-13 キヤノンメディカルシステムズ株式会社 Magnetic resonance imaging apparatus and multi-slice imaging method
CN110215210B (en) * 2019-05-28 2023-08-22 上海联影医疗科技股份有限公司 Magnetic resonance imaging method, system, computer device and readable storage medium

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JP3175939B2 (en) * 1990-11-30 2001-06-11 株式会社東芝 Magnetic resonance imaging
US5633586A (en) * 1996-02-29 1997-05-27 Siemens Medical Systems, Inc. Rapid fat- or water-suppressed multislice MR pulse sequence including initial prepulse
JP4070300B2 (en) * 1998-04-30 2008-04-02 株式会社東芝 MRI equipment
JP2001095775A (en) * 1999-10-01 2001-04-10 Hitachi Medical Corp Nuclear magnetic resonance imaging apparatus and procedure
JP3987686B2 (en) * 2001-02-02 2007-10-10 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 Static magnetic field correction method and MRI apparatus
US6794869B2 (en) * 2001-03-30 2004-09-21 General Electric Company Moving table MRI with frequency-encoding in the z-direction
JP3878429B2 (en) * 2001-04-05 2007-02-07 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
JP3977067B2 (en) * 2001-12-06 2007-09-19 株式会社日立メディコ Magnetic resonance imaging system
CN1910471A (en) * 2004-01-14 2007-02-07 皇家飞利浦电子股份有限公司 Magnetic resonance imaging with real-time magnetic field mapping

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