JP2001238865A5 - - Google Patents

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JP2001238865A5
JP2001238865A5 JP2000054734A JP2000054734A JP2001238865A5 JP 2001238865 A5 JP2001238865 A5 JP 2001238865A5 JP 2000054734 A JP2000054734 A JP 2000054734A JP 2000054734 A JP2000054734 A JP 2000054734A JP 2001238865 A5 JP2001238865 A5 JP 2001238865A5
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JP
Japan
Prior art keywords
magnetic field
magnetic resonance
pulse sequence
measurement target
imaging apparatus
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JP2000054734A
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Japanese (ja)
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JP2001238865A (en
JP4229254B2 (en
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Priority claimed from JP2000054734A external-priority patent/JP4229254B2/en
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Description

【特許請求の範囲】
【請求項1】
静磁場を発生する静磁場発生手段、前記静磁場中に置かれた被検査体に対して、高周波磁場を印加する送信手段、前記静磁場に磁場勾配を与える傾斜磁場発生手段、前記被検査体から発生する核磁気共鳴信号を計測する受信手段、これら送信手段、傾斜磁場発生手段および受信手段を所定のパルスシーケンスに従い制御する制御手段、計測された核磁気共鳴信号に基づいて画像処理を行う画像処理手段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、記被検査体の計測対象領域における流体を画像化する第1のパルスシーケンスを有し、前記計測対象領域における流体の流速分布に対応して前記計測対象領域の域分割を行い、前記分割された領域毎に前記第1のパルスシーケンスを実行することを特徴とする磁気共鳴イメージング装置。

【請求項2】
請求項1記載の磁気共鳴イメージング装置において、
前記制御手段は、前記計測対象領域における流体の流速を計測する第2のパルスシーケンスを有して、該第2のパルスシーケンスを用いて取得した流速計測結果に対応して前記計測対象領域の領域分割を行うことを特徴とする磁気共鳴イメージング装置。

【請求項3】
請求項1又は2記載の磁気共鳴イメージング装置において、
前記制御手段は、スラブ方向にフローエンコードを印加して前記流速計測を行うことを特徴とする磁気共鳴イメージング装置。

【請求項4】
請求項1乃至3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、
前記制御手段は、前記流速が早い場合の領域分割の大きさを前記流速が遅い場合の領域分割の大きさよりも大きく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 that generates a static magnetic field, a transmitting means that applies a high-frequency magnetic field to the object to be inspected placed in the static magnetic field, a gradient magnetic field generating means that gives a magnetic field gradient to the static magnetic field, and the object to be inspected. A receiving means for measuring a nuclear magnetic resonance signal generated from, a controlling means for controlling these transmitting means, a gradient magnetic field generating means and a receiving means according to a predetermined pulse sequence, and an image for performing image processing based on the measured nuclear magnetic resonance signal. In a magnetic resonance imaging apparatus equipped with a processing means,
Wherein, prior SL has a first pulse sequence for imaging the fluid in the measurement target region of the inspection object, realm division of the measurement target area in response to the flow velocity distribution of the fluid in the measurement target region The magnetic resonance imaging apparatus, wherein the first pulse sequence is executed for each of the divided regions.

2.
In the magnetic resonance imaging apparatus according to claim 1,
The control means has a second pulse sequence for measuring the flow velocity of the fluid in the measurement target region, and the region of the measurement target region corresponds to the flow velocity measurement result acquired by using the second pulse sequence. A magnetic resonance imaging apparatus characterized by performing division.

3.
In the magnetic resonance imaging apparatus according to claim 1 or 2.
The control means is a magnetic resonance imaging apparatus characterized in that flow encoding is applied in the slab direction to measure the flow velocity.

4.
In the magnetic resonance imaging apparatus according to any one of claims 1 to 3.
The control means is a magnetic resonance imaging apparatus characterized in that the size of the region division when the flow velocity is high is made larger than the size of the region division when the flow velocity is slow.

即ち、本発明のMRI装置は、静磁場を発生する静磁場発生手段、前記静磁場中に置かれた被検査体に対して、高周波磁場を印加する送信手段、前記静磁場に磁場勾配を与える傾斜磁場発生手段、前記被検査体から発生する核磁気共鳴信号を計測する受信手段、これら送信手段、傾斜磁場発生手段および受信手段を所定のパルスシーケンスに従い制御する制御手段、計測された核磁気共鳴信号に基づいて画像処理を行う画像処理手段を備え、
前記制御手段は、記被検査体の計測対象領域における流体を画像化する第1のパルスシーケンスを有し、前記計測対象領域における流体の流速分布に対応して前記計測対象領域の域分割を行い、前記分割された領域毎に前記第1のパルスシーケンスを実行することを特徴とする。
That is, the MRI apparatus of the present invention applies a static magnetic field generating means for generating a static magnetic field, a transmitting means for applying a high-frequency magnetic field to an object to be inspected placed in the static magnetic field, and a magnetic field gradient to the static magnetic field. A gradient magnetic field generating means, a receiving means for measuring a nuclear magnetic resonance signal generated from the object to be inspected, a controlling means for controlling these transmitting means, a gradient magnetic field generating means and a receiving means according to a predetermined pulse sequence, and a measured nuclear magnetic resonance. Equipped with an image processing means that performs image processing based on a signal
Wherein, prior SL has a first pulse sequence for imaging the fluid in the measurement target region of the inspection object, realm division of the measurement target area in response to the flow velocity distribution of the fluid in the measurement target region Is performed, and the first pulse sequence is executed for each of the divided regions.

JP2000054734A 2000-02-29 2000-02-29 Magnetic resonance imaging system Expired - Fee Related JP4229254B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000054734A JP4229254B2 (en) 2000-02-29 2000-02-29 Magnetic resonance imaging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000054734A JP4229254B2 (en) 2000-02-29 2000-02-29 Magnetic resonance imaging system

Publications (3)

Publication Number Publication Date
JP2001238865A JP2001238865A (en) 2001-09-04
JP2001238865A5 true JP2001238865A5 (en) 2007-03-15
JP4229254B2 JP4229254B2 (en) 2009-02-25

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JP2000054734A Expired - Fee Related JP4229254B2 (en) 2000-02-29 2000-02-29 Magnetic resonance imaging system

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7613496B2 (en) * 2005-09-22 2009-11-03 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus and magnetic resonance imaging method
US9014781B2 (en) * 2012-04-19 2015-04-21 General Electric Company Systems and methods for magnetic resonance angiography

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