JP2010512924A - Mrイメージングシステムに用いられるrfコイル - Google Patents
Mrイメージングシステムに用いられるrfコイル Download PDFInfo
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- JP2010512924A JP2010512924A JP2009542358A JP2009542358A JP2010512924A JP 2010512924 A JP2010512924 A JP 2010512924A JP 2009542358 A JP2009542358 A JP 2009542358A JP 2009542358 A JP2009542358 A JP 2009542358A JP 2010512924 A JP2010512924 A JP 2010512924A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 13
- 230000005284 excitation Effects 0.000 claims abstract description 31
- 239000004020 conductor Substances 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
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- 239000000758 substrate Substances 0.000 claims description 4
- 239000003989 dielectric material Substances 0.000 claims description 2
- 238000002595 magnetic resonance imaging Methods 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 description 24
- 238000009826 distribution Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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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
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
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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
- G01R33/42—Screening
- G01R33/422—Screening of the radio frequency field
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims (18)
- RF励起信号を送信する及び/又はMR緩和信号を受信する、MRイメージングシステムのためのRFコイルであって、磁気導体又は磁壁といったRF/MR周波数帯において作動するメタ物質と結合する、又はメタ物質を有する、RFコイル。
- 前記メタ物質が、AMC物質である、請求項1に記載のRFコイル。
- 前記メタ物質が、PECスクリーンを置き換えるよう配置され、及び/又はPECスクリーンの前に配置され、及び/又は前記RFコイルのPECスクリーンと組み合わされる、請求項1に記載のRFコイル。
- 前記メタ物質が、金属的な接地面上の誘電体、ワイヤ及び金属パッチから構築されるチューニングされた共振周期的構造体の形式で与えられる、請求項1に記載のRFコイル。
- 前記メタ物質が、少なくとも1つの磁場様式を生成するため表面電流が共振的に励起される共振表面を形成するよう、互いに容量結合されるパッチのアレイを有する、請求項4に記載のRFコイル。
- コンデンサを切替えることにより前記メタ物質の前記共振周波数が制御されることができるよう、前記切換可能なコンデンサを用いて、前記記パッチが互いに容量結合される、請求項5に記載のRFコイル。
- 方形フォームを持つ、及び/又は方形形状を持つパッチを有する、請求項4に記載のRFコイル。
- 円形フォームを持つ、及び/又はリングセクター形状を持つパッチを有する、請求項4に記載のRFコイル。
- 前記共振表面電流を励起させるため、導体が、前記パッチのアレイの上又は下に配置される、請求項4に記載のRFコイル。
- 前記導体が、ループの形で与えられる、請求項9に記載のRFコイル。
- 前記導体が、前記パッチのアレイと交差するストリップラインの形で与えられる、請求項9に記載のRFコイル。
- 方形のフォームを持ち、前記導体が、前記パッチのアレイにわたり対角に延在するラインの形で与えられる、請求項11に記載のRFコイル。
- 前記パッチが、柱を用いて接地面に接続される、請求項5に記載のRFコイル。
- 前記パッチのアレイが、平面又は曲面を形成する、請求項1に記載のRFコイル。
- 前記パッチのアレイが、誘電体基板の一方の側に配置され、前記基板の他方の側には接地面が設けられる、請求項1に記載のRFコイル。
- 実質的に同じ共振周波数での3つの直交する基礎磁場モードを励起させるため、前記パッチのサイズ及び/又は前記結合コンデンサの値を選択することによりチューニングされる、請求項1に記載のRFコイル。
- 請求項1乃至16のいずれかに記載の少なくとも1つのRFコイルを有する、MRイメージングシステムのためのRFアンテナ。
- RF励起信号を送信し、及び/又はMR緩和信号を受信するための、請求項1乃至17の少なくとも一項に記載のRF/MRコイル又はアンテナを有する、磁気共鳴イメージングシステム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP06126960.1 | 2006-12-22 | ||
EP06126960 | 2006-12-22 | ||
PCT/IB2007/055198 WO2008078284A2 (en) | 2006-12-22 | 2007-12-18 | Rf coil for use in an mr imaging system, in combination with a metamaterial |
Publications (2)
Publication Number | Publication Date |
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JP2010512924A true JP2010512924A (ja) | 2010-04-30 |
JP5238715B2 JP5238715B2 (ja) | 2013-07-17 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009542358A Active JP5238715B2 (ja) | 2006-12-22 | 2007-12-18 | Mrイメージングシステムに用いられるrfコイル |
Country Status (6)
Country | Link |
---|---|
US (1) | US8159223B2 (ja) |
EP (1) | EP2097763B1 (ja) |
JP (1) | JP5238715B2 (ja) |
CN (1) | CN101568849B (ja) |
RU (1) | RU2451946C2 (ja) |
WO (1) | WO2008078284A2 (ja) |
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- 2007-12-18 JP JP2009542358A patent/JP5238715B2/ja active Active
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Publication number | Publication date |
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WO2008078284A2 (en) | 2008-07-03 |
WO2008078284A3 (en) | 2008-08-21 |
EP2097763B1 (en) | 2014-02-26 |
US8159223B2 (en) | 2012-04-17 |
RU2009128239A (ru) | 2011-01-27 |
JP5238715B2 (ja) | 2013-07-17 |
CN101568849A (zh) | 2009-10-28 |
CN101568849B (zh) | 2013-07-24 |
EP2097763A2 (en) | 2009-09-09 |
US20100039111A1 (en) | 2010-02-18 |
RU2451946C2 (ru) | 2012-05-27 |
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