JP2007536018A - 磁気共鳴無線周波数コイルのための多電流素子 - Google Patents
磁気共鳴無線周波数コイルのための多電流素子 Download PDFInfo
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- G—PHYSICS
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- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
- G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
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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
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
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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
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
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Abstract
Description
本出願は、参照により本明細書に組み込まれている2004年5月7日に出願され、「MULTI−CURRENT ELEMENTS FOR MAGNETIC RESONANCE RADIO FREQUENCY COILS」と題された米国仮特許出願第60/568889号明細書の優先権を主張する。
本主題事項は、部局許諾番号MIND Institute and Kech Foundation、NIH−P41 RR08079、NIH−R01 CA94200、NIH−R01 EB00085、および、NIH R33 CA94318のもとで国立衛生研究所(NIH)によって部分的に支援されている。米国政府は、本発明に特定の権利を有することができる。
1つの例において、コイルは多数の電流経路を有する各電流ユニットを備えた複数の電流ユニットを含む。様々な例において、電流ユニットはボリュームの周囲に、または、面内に配置構成されている。本主題事項により配置構成された横方向電磁(TEM)コイルは複数の電流ユニットを含む。電流ユニットはボリューム・コイルの面内に少なくとも1つの開口を設けるように配列される。加えて、電流ユニットは、むくの、または末端開口を含む背面版を使用して組み立てられている。1つの例では、背面版は導電性である。
Claims (30)
- 無線周波数コイルのための電流ユニットであって、
誘電体に近接した第1の無線周波数電流経路と、
前記誘電体に近接した前記第1の無線周波数電流経路とは独立した第2の無線周波数電流経路と、を含み、
前記第1の無線周波数電流経路と前記第2の無線周波数電流経路は磁気共鳴画像形成のために配置構成されている電流ユニット。 - 前記誘電体に近接した第3の無線周波数電流経路をさらに含み、前記第3の無線周波数電流経路は前記第1の電流経路と前記第2の電流経路とは独立しており、前記第3の無線周波数電流経路は磁気共鳴画像形成のために配置構成されている請求項1に記載の電流ユニット。
- 前記第1の無線周波数電流経路、前記第2の無線周波数電流経路、前記無線周波数電流経路が、実質的に平面状であり、かつ、平行に整列している請求項2に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つは誘電体内に埋め込まれている請求項1に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つは複数の孔、スロット、穴、または、開口を含む請求項1に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つはZ軸に沿って符号化するように配置構成されている請求項1に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つはX軸とY軸の少なくとも1つに沿って符号化するように配置構成されている請求項1に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つは導電性ループを含む請求項1に記載の電流ユニット。
- 前記第1の電流経路と前記第2の電流経路の少なくとも1つは面に沿って先細りとなっている請求項1に記載の電流ユニット。
- 磁気共鳴無線周波数コイルであって、
互いに近接して配列され、かつ、各電流ユニットは少なくとも2つの電流経路を有する少なくとも2つの電流ユニットを含み、第1の電流経路は励起磁場を発生するように配置構成され、第2の電流経路は信号を検出するように配置構成されているコイル。 - 前記少なくとも2つの電流ユニットはボリュームの周囲に分布されている請求項10に記載のコイル。
- 前記少なくとも2つの電流ユニットは面の周辺に分布されている請求項10に記載のコイル。
- 前記コイルは1と12テスラの間の磁場強度を有する静磁場内で動作するために配置構成されている請求項10に記載のコイル。
- 磁気共鳴無線周波数コイルのための電流ユニットであって、
各電流素子が第1の電流経路、および前記第1の電流経路と平行の関係にある第2の電流経路を有する第1の電流素子と第2の電流素子であって、前記第1の電流素子は第1の平面内に存在し、前記第2の電流素子は第2の平面内に存在する電流素子を含み、
前記第1の平面は前記第2の平面とは異なっており、かつ、前記第1の平面と前記第2の平面は直円上で交差している電流ユニット。 - 前記第1の電流素子と前記第2の電流素子の少なくとも1つはループ導電体を含む請求項14に記載の電流ユニット。
- 前記第1の電流素子と前記第2の電流素子に近接して配置されている第3の電流素子をさらに含む請求項15に記載の電流ユニット。
- 各平面電流素子が実質的に平行に整列され、かつ、前記第1の電流素子と前記第2の電流素子に近接して配置されている複数の平面電流素子をさらに含む請求項15に記載の電流ユニット。
- 電流ユニットの第1の電流経路を使用して無線周波数磁気共鳴コイル内に第1の磁場を発生するステップと、
前記電流ユニットの第2の電流経路を使用して第2の磁場を発生するステップと、
前記電流ユニットを使用して信号を検出するステップと、を含む方法。 - 前記検出するステップは前記コイルのZ軸に沿った符号化を含む請求項18に記載の方法。
- 前記発生するステップは電流、周波数、位相角度、間隔、タイミングの少なくとも1つを変調するステップを含む請求項18に記載の方法。
- 前記発生するステップは前記電流ユニットに供給される電力を変調するステップを含む請求項18に記載の方法。
- 前記第1の電流経路を第1の特定の共鳴周波数に同調するステップをさらに含む請求項18に記載の方法。
- 前記第2の電流経路を第2の特定の共鳴周波数に同調するステップをさらに含み、前記第1の特定の共鳴周波数は前記第2の特定の共鳴周波数とは異なっている請求項22に記載の方法。
- 前記第1の電流経路と前記第2の電流経路をリアクタンス的に結合するステップをさらに含む請求項18に記載の方法。
- 前記第1の電流経路と前記第2の電流経路をリアクタンス的に結合解除するステップをさらに含む請求項18に記載の方法。
- 前記第1の電流経路を第1の空間領域に結合し、かつ、前記第2の電流経路を第2の空間領域に結合するステップをさらに含む請求項18に記載の方法。
- 互いに近接して配列され、かつ、各電流ユニットが少なくとも2つの電流経路を有する少なくとも2つの電流ユニットを含み、少なくとも1つの電流経路は磁場を発生するステップまたは信号を受信するステップの少なくとも1つのために配置構成されている磁気共鳴無線周波数コイル。
- 前記少なくとも2つの電流ユニットはボリュームの周囲に分布されている請求項27に記載のコイル。
- 前記少なくとも2つの電流ユニットは面の周囲に分布されている請求項27に記載のコイル。
- 前記コイルは1と12テスラの間の磁場強度を有する静磁場中で動作するために配置構成されている請求項27に記載のコイル。
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US56981004P | 2004-05-11 | 2004-05-11 | |
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PCT/US2005/016128 WO2005111645A2 (en) | 2004-05-07 | 2005-05-06 | Multi-current elements for magnetic resonance radio frequency coils |
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EP (1) | EP1751571B1 (ja) |
JP (2) | JP5583887B2 (ja) |
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CA2565248A1 (en) | 2005-11-24 |
US20080084210A1 (en) | 2008-04-10 |
JP5583887B2 (ja) | 2014-09-03 |
WO2005111645A3 (en) | 2006-05-18 |
AU2005242783A1 (en) | 2005-11-24 |
CA2565248C (en) | 2014-07-08 |
JP2013063334A (ja) | 2013-04-11 |
US20050264291A1 (en) | 2005-12-01 |
EP1751571B1 (en) | 2020-07-15 |
WO2005111645A2 (en) | 2005-11-24 |
US7710117B2 (en) | 2010-05-04 |
KR20070030208A (ko) | 2007-03-15 |
EP1751571A2 (en) | 2007-02-14 |
JP5498593B2 (ja) | 2014-05-21 |
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