JP2005095694A - Mriシステム - Google Patents
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- JP2005095694A JP2005095694A JP2005000610A JP2005000610A JP2005095694A JP 2005095694 A JP2005095694 A JP 2005095694A JP 2005000610 A JP2005000610 A JP 2005000610A JP 2005000610 A JP2005000610 A JP 2005000610A JP 2005095694 A JP2005095694 A JP 2005095694A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
- G01R33/5619—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences by temporal sharing of data, e.g. keyhole, block regional interpolation scheme for k-Space [BRISK]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
- G01R33/5635—Angiography, e.g. contrast-enhanced angiography [CE-MRA] or time-of-flight angiography [TOF-MRA]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
- G01R33/56308—Characterization of motion or flow; Dynamic imaging
- G01R33/56325—Cine imaging
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- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
【解決手段】k空間の周辺領域のサンプリング速度よりも高速でk空間の中央領域をサンプリングすることにより、再構成された連続的な画像を増加させる。前記k空間の周辺領域から時間的に最近傍の複数のサンプルを用いて前記k空間の中央領域の各サンプリングにおいて複数の画像フレームを再構成する。
【選択図】図1
Description
AB AC AD AB AC AD AB AC AD...
AD AC AB AD AC AB AD AC AB...
108 CPUモジュール
118 バックプレーン
119 CPUモジュール
121 パルス発生器モジュール
127 傾斜増幅器システム
129 生理機能収集コントローラ
133 走査インターフェイス回路
139 傾斜コイル・アッセンブリ
Claims (8)
- 患者からデータを取得し,コントラスト強調画像を生成するMRIシステムであって,
選択された三次元k空間の中央領域をある時間速度でサンプリングし,
選択された三次元k空間の周辺領域をより低い時間速度でサンプリングし,
前記k空間の中央領域の複数のサンプルの各セットに対して,前記k空間の中央領域の複数のサンプルと,前記k空間の周辺領域の時間的に最隣接する2つのデータ・セット間で補間を行うことにより得られた複数のサンプルとを含む1つの三次元のデータ・セットを形成し,
各三次元のデータ・セットから1つの三次元フレーム画像を再構成することにより,コントラスト剤を投与された患者の動的検査の間,選択された三次元k空間から一連の三次元フレーム画像を生成する手段と,
1つの三次元差分画像を生成するために複数の前記三次元フレーム画像の2つの間で減算を実行する手段を含む,複数の前記三次元フレーム画像から1つのコントラスト強調画像を生成する手段と
を含むMRIシステム。 - 連続する三次元のデータ・セット間で補間を行うことにより付加的な三次元のデータ・セットが形成され,該付加的な三次元のデータ・セットから付加的な三次元フレーム画像が再構成される,請求項1に記載のMRIシステム。
- 前記k空間の中央領域は実質的に三次元k空間の円形の中央領域であり,前記k空間の周辺領域は三次元k空間の,前記中央領域を囲む環状周辺領域である,請求項1に記載のMRIシステム。
- 前記k空間の中央領域の連続するサンプル・データ間で補間を行うことにより付加的な三次元のデータ・セットを得る手段と,
前記付加的な三次元のデータ・セットから付加的な三次元のフレーム画像を得る手段とを含む請求項1に記載のMRIシステム。 - 前記付加的な三次元のデータ・セットを得る手段は,前記k空間の周辺領域の時間的に最近傍の二つのサンプル間で補間を行う手段を含む請求項4に記載のMRIシステム。
- 患者からデータを取得し,コントラスト強調画像を生成するMRIシステムであって,
選択された三次元k空間の実質的に円形の中央領域をある時間速度でサンプリングし,
選択された三次元k空間の,前記中央領域を囲む環状周辺領域をより低い時間速度でサンプリングし,
前記k空間の中央領域の複数のサンプルの各セットに対して,前記k空間の中央領域の複数のサンプルと,前記k空間の周辺領域の時間的に最隣接するデータ・セットから得られた複数のサンプルとを含む1つの三次元のデータ・セットを形成し,
各三次元のデータ・セットから1つの三次元フレーム画像を再構成することにより,コントラスト剤を投与された患者の動的検査の間,選択された三次元k空間から一連の三次元フレーム画像を生成する手段と,
1つの三次元差分画像を生成するために複数の前記三次元フレーム画像の2つの間で減算を実行する手段を含む,複数の前記三次元フレーム画像から1つのコントラスト強調画像を生成する手段と
を含むMRIシステム。 - 前記k空間の実質的に円形の中央領域の連続するサンプル・データ間で補間を行うことにより付加的な三次元のデータ・セットを得る手段と、
前記付加的な三次元のデータ・セットから付加的な三次元のフレーム画像を得る手段とを含む請求項6に記載のMRIシステム。 - 前記付加的な三次元のデータ・セットを得る手段は、前記k空間の周辺領域の時間的に最近傍の二つのサンプル間で補間を行う手段を含む請求項7に記載のMRIシステム。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/622,718 US5713358A (en) | 1996-03-26 | 1996-03-26 | Method for producing a time-resolved series of 3D magnetic resonance angiograms during the first passage of contrast agent |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9071923A Division JPH105191A (ja) | 1996-03-26 | 1997-03-25 | 三次元ディジタル減算磁気共鳴血管撮影法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007188314A Division JP2007260454A (ja) | 1996-03-26 | 2007-07-19 | Mriシステム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005095694A true JP2005095694A (ja) | 2005-04-14 |
JP4011585B2 JP4011585B2 (ja) | 2007-11-21 |
Family
ID=24495242
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9071923A Pending JPH105191A (ja) | 1996-03-26 | 1997-03-25 | 三次元ディジタル減算磁気共鳴血管撮影法 |
JP2005000610A Expired - Lifetime JP4011585B2 (ja) | 1996-03-26 | 2005-01-05 | Mriシステム |
JP2007188314A Pending JP2007260454A (ja) | 1996-03-26 | 2007-07-19 | Mriシステム |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9071923A Pending JPH105191A (ja) | 1996-03-26 | 1997-03-25 | 三次元ディジタル減算磁気共鳴血管撮影法 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007188314A Pending JP2007260454A (ja) | 1996-03-26 | 2007-07-19 | Mriシステム |
Country Status (4)
Country | Link |
---|---|
US (1) | US5713358A (ja) |
EP (1) | EP0798566B1 (ja) |
JP (3) | JPH105191A (ja) |
DE (1) | DE69709425T2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010523166A (ja) * | 2007-01-02 | 2010-07-15 | ウイスコンシン アラムナイ リサーチ フオンデーシヨン | 位相差合成画像を用いた高度に制約された逆投影再構成法を利用した造影mra |
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US5873825A (en) * | 1997-04-11 | 1999-02-23 | Wisconsin Alumni Research Foundation | Three dimensional digital subtraction magnetic resonance angiography with limited k-space mask |
US7048716B1 (en) | 1997-05-15 | 2006-05-23 | Stanford University | MR-compatible devices |
US6272370B1 (en) | 1998-08-07 | 2001-08-07 | The Regents Of University Of Minnesota | MR-visible medical device for neurological interventions using nonlinear magnetic stereotaxis and a method imaging |
US6026316A (en) * | 1997-05-15 | 2000-02-15 | Regents Of The University Of Minnesota | Method and apparatus for use with MR imaging |
US6031375A (en) * | 1997-11-26 | 2000-02-29 | The Johns Hopkins University | Method of magnetic resonance analysis employing cylindrical coordinates and an associated apparatus |
ATE504007T1 (de) * | 1997-12-12 | 2011-04-15 | Wisconsin Alumni Res Found | Schnelle magnetresonanzbildgebung unter verwendung radialer projektionen |
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JP2007260454A (ja) | 2007-10-11 |
JP4011585B2 (ja) | 2007-11-21 |
EP0798566A1 (en) | 1997-10-01 |
EP0798566B1 (en) | 2002-01-02 |
JPH105191A (ja) | 1998-01-13 |
US5713358A (en) | 1998-02-03 |
DE69709425T2 (de) | 2002-09-12 |
DE69709425D1 (de) | 2002-02-07 |
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