JP4011585B2 - Mriシステム - Google Patents
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- JP4011585B2 JP4011585B2 JP2005000610A JP2005000610A JP4011585B2 JP 4011585 B2 JP4011585 B2 JP 4011585B2 JP 2005000610 A JP2005000610 A JP 2005000610A JP 2005000610 A JP2005000610 A JP 2005000610A JP 4011585 B2 JP4011585 B2 JP 4011585B2
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Images
Classifications
-
- 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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- Physics & Mathematics (AREA)
- 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)
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 (7)
- 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
を含み,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,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3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5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6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 JP2005095694A (ja) | 2005-04-14 |
JP4011585B2 true 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) |
Families Citing this family (115)
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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 |
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US6031375A (en) * | 1997-11-26 | 2000-02-29 | The Johns Hopkins University | Method of magnetic resonance analysis employing cylindrical coordinates and an associated apparatus |
WO1999030179A2 (en) * | 1997-12-12 | 1999-06-17 | Wisconsin Alumni Research Foundation | Rapid acquisition magnetic resonance imaging using radial projections |
US6144200A (en) * | 1998-02-20 | 2000-11-07 | General Electric Company | Acquisition of segmented MRI cardiac data using an EPI pulse sequence |
US6381486B1 (en) | 1999-01-08 | 2002-04-30 | Wisconsin Alumni Research Foundation | Magnetic resonance angiography with vessel segmentation |
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DE69709425T2 (de) | 2002-09-12 |
EP0798566B1 (en) | 2002-01-02 |
JPH105191A (ja) | 1998-01-13 |
JP2007260454A (ja) | 2007-10-11 |
EP0798566A1 (en) | 1997-10-01 |
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