JP5484775B2 - 圧縮センシングと共にパラレルイメージングを用いるシステムおよび方法 - Google Patents
圧縮センシングと共にパラレルイメージングを用いるシステムおよび方法 Download PDFInfo
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- JP5484775B2 JP5484775B2 JP2009104622A JP2009104622A JP5484775B2 JP 5484775 B2 JP5484775 B2 JP 5484775B2 JP 2009104622 A JP2009104622 A JP 2009104622A JP 2009104622 A JP2009104622 A JP 2009104622A JP 5484775 B2 JP5484775 B2 JP 5484775B2
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- 238000003384 imaging method Methods 0.000 title claims description 63
- 238000000034 method Methods 0.000 title claims description 57
- 238000005070 sampling Methods 0.000 claims description 50
- 238000002595 magnetic resonance imaging Methods 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000004590 computer program Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
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Classifications
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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
- G01R33/5611—Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- 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]
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- Life Sciences & Earth Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Signal Processing (AREA)
- Medical Informatics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Biophysics (AREA)
- Pathology (AREA)
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- Heart & Thoracic Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
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- Magnetic Resonance Imaging Apparatus (AREA)
Description
12 オペレータコンソール
13 入力装置
14 制御パネル
16 表示画面、ディスプレイ
18 リンク
20 コンピュータシステム
20a バックプレーン
22 画像プロセッサモジュール
24 CPUモジュール
26 メモリモジュール
32 システム制御
32a バックプレーン
34 シリアルリンク
36 CPUモジュール
38 パルスジェネレータモジュール、パルスモジュール
40 シリアルリンク
42 傾斜増幅器、傾斜増幅器システム
44 生理学的取得制御装置
46 走査室インターフェース回路
48 患者位置決めシステム
50 傾斜コイル、傾斜コイルアセンブリ
52 磁石、磁石アセンブリ
54 分極磁石
56 全身RFコイル
58 RFトランシーバシステム
60 RF増幅器
62 送信/受信スイッチ、RFスイッチ
64 前置増幅器
66 メモリモジュール
68 アレイプロセッサ
105 k空間の中心領域、中心部分
110 データ点
115 周辺領域
117 吹き出し領域
129 データ点
130 k空間サンプリングパターン
139 データ点
140 ランダムなk空間サンプリングパターン
141 データ点
142 吹き出し部
150 クラスタ化された非干渉性のk空間サンプリングパターン
154 クラスタ
172 吹き出し部
160 合成された非干渉性のk空間サンプリングパターン
Claims (7)
- 磁石(52)の内径周りに配置された複数の傾斜コイル(50)、RFトランシーバシステム(58)、およびMR画像を取得するためにRF信号をRFコイルアセンブリに送信するように、パルスモジュール(38)によって制御されるRFスイッチ(62)を有する磁気共鳴撮像(MRI)システム(10)と、
k空間グリッドの全体に満たない複数のk空間位置に対してアンダーサンプリングしたMRデータを取得し(120)、
MRデータが取得されなかった一部のk空間位置に対してパラレルイメージング技法により未取得のMRデータを合成し(122)、かつ
前記アンダーサンプリングされて取得されたMRデータおよび前記合成された未取得のMRデータから、再構成された画像を生成するために、圧縮センシング再構成技法を適用する(124)ようにプログラムされたコンピュータ可読記憶媒体を備えるコンピュータと、
を備え、
前記アンダーサンプリングされて取得されたMRデータが、k空間内で、クラスタ化された非干渉性パターン(150)で取得される、
MRI装置。 - 前記コンピュータが、完全にサンプリングされたk空間の中心部分(105)を取得するようにさらにプログラムされることを特徴とする請求項1に記載の装置。
- 前記コンピュータが、前記圧縮センシング技法の前に、かつ前記圧縮センシング技法とは別個に、前記パラレルイメージング技法を適用するようにさらにプログラムされることを特徴とする請求項1に記載の装置。
- 前記パラレルイメージング技法が、SMASH(Simultaneous Acquisition of Spatial Harmonics)、AUTO−SMASH(Automatic Simultaneous Acquisition of Spatial Harmonics)、GRAPPA(Generalized Autocalibrating Partially Parallel Acquisition;オートキャリブレーションパラレル法)、PARS(Parallel Magnetic Resonance Imaging with Adaptive Radius in k−space)、ARC(Autocalibrating Reconstruction for Cartesian Sampling)、およびAPPEAR(Anti−aliasing Partially Parallel Encoded Acquisition Reconstruction)のうちの1つを含むことを特徴とする請求項1に記載の装置。
- 前記パラレルイメージング技法および前記圧縮センシング技法が、独立して最適化されることを特徴とする請求項1に記載の装置。
- 前記パラレルイメージング技法が、非逐次パラレルイメージング技法であることを特徴とする請求項1に記載の装置。
- 前記コンピュータが、MRデータの取得と並行して前記パラレルイメージング技法を適用するようにさらにプログラムされることを特徴とする請求項1に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/116,067 US7688068B2 (en) | 2008-05-06 | 2008-05-06 | System and method for using parallel imaging with compressed sensing |
US12/116,067 | 2008-05-06 |
Publications (3)
Publication Number | Publication Date |
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JP2009268901A JP2009268901A (ja) | 2009-11-19 |
JP2009268901A5 JP2009268901A5 (ja) | 2012-05-24 |
JP5484775B2 true JP5484775B2 (ja) | 2014-05-07 |
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JP2009104622A Active JP5484775B2 (ja) | 2008-05-06 | 2009-04-23 | 圧縮センシングと共にパラレルイメージングを用いるシステムおよび方法 |
Country Status (3)
Country | Link |
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US (1) | US7688068B2 (ja) |
JP (1) | JP5484775B2 (ja) |
DE (1) | DE102009025753A1 (ja) |
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