JP2007185250A - 磁気共鳴イメージング装置 - Google Patents
磁気共鳴イメージング装置 Download PDFInfo
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- JP2007185250A JP2007185250A JP2006004019A JP2006004019A JP2007185250A JP 2007185250 A JP2007185250 A JP 2007185250A JP 2006004019 A JP2006004019 A JP 2006004019A JP 2006004019 A JP2006004019 A JP 2006004019A JP 2007185250 A JP2007185250 A JP 2007185250A
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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
- G01R33/563—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
- G01R33/56375—Intentional motion of the sample during MR, e.g. moving table imaging
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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
- G01R33/563—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
- G01R33/56375—Intentional motion of the sample during MR, e.g. moving table imaging
- G01R33/56383—Intentional motion of the sample during MR, e.g. moving table imaging involving motion of the sample as a whole, e.g. multistation MR or MR with continuous table motion
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Abstract
【解決手段】再構成部103および制御部107は、被検体Pの横隔膜の静磁場中における位置を検出し、この検出された位置が許容範囲内にあるときに収集されたデータに基づいて画像を再構成する。さらに制御部107および寝台制御部5は、検出された位置の基準位置からの偏移量を補償するべく被検体Pを天板41により移動させるように寝台4を制御する。
【選択図】図1
Description
Claims (9)
- 静磁場中に載置された被検体を移動させる移動手段と、
前記被検体から放射される磁気共鳴信号を表すデータを収集する収集手段と、
前記被検体の位置検出用部位の前記静磁場中における位置を検出する検出手段と、
前記検出された位置が許容範囲内にあるときに収集された前記データに基づいて画像を再構成する再構成手段と、
前記検出された位置の基準位置からの偏移量を補償するように前記移動手段を制御する制御手段とを具備することを特徴とする磁気共鳴イメージング装置。 - 前記収集手段は、前記位置検出用部位の周辺から放射される磁気共鳴信号を表すデータを収集するための位置検出用のデータ収集をさらに行い、
前記検出手段は、前記位置検出用のデータ収集により収集された前記データに基づいて前記位置検出用部位の位置を検出することを特徴とする請求項1に記載の磁気共鳴イメージング装置。 - 前記収集手段は、周期的に前記データを収集し、
前記検出手段は、前記収集手段が前記データを収集する前に前記位置検出用部位の位置を検出し、
前記再構成手段は、前記許容範囲内に前記位置検出用部位の位置が検出された直後に前記収集手段により収集された前記データを前記再構成に採用することを特徴とする請求項1に記載の磁気共鳴イメージング装置。 - 前記制御手段は、前記再構成手段による前記データの採用率が規定値以下になったことに応じて前記移動手段を制御することを特徴とする請求項3に記載の磁気共鳴イメージング装置。
- 前記偏移量を認識可能とする情報を使用者に提示する手段をさらに備え、
前記制御手段は、前記使用者からの指示に応じて前記偏移量を補償するように前記移動手段を制御することを特徴とする請求項1に記載の磁気共鳴イメージング装置。 - 前記制御手段は、前記収集手段が前記データを収集していないときに前記移動手段を動作させることを特徴とする請求項1に記載の磁気共鳴イメージング装置。
- 静磁場中に載置された被検体から放射される磁気共鳴信号を表すデータを収集する収集手段と、
前記被検体の位置検出用部位の前記静磁場中における位置を検出する検出手段と、
単位期間内に前記検出手段により検出された位置のばらつきの大きさに応じて許容範囲の大きさを設定する設定手段と、
前記検出された位置が前記許容範囲内にあるときに収集された前記データに基づいて画像を再構成する再構成手段とを具備することを特徴とする磁気共鳴イメージング装置。 - 前記設定手段は、前記検出された位置の分散に応じて前記許容範囲の大きさを設定することを特徴とする請求項7に記載の磁気共鳴イメージング装置。
- 前記設定手段は、前記検出された位置が前記許容範囲内となった確率に応じて前記許容範囲の大きさを設定することを特徴とする請求項7に記載の磁気共鳴イメージング装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006004019A JP4896526B2 (ja) | 2006-01-11 | 2006-01-11 | 磁気共鳴イメージング装置 |
US11/648,542 US7570050B2 (en) | 2006-01-11 | 2007-01-03 | Magnetic resonance imaging apparatus and method |
CN2008101863845A CN101493507B (zh) | 2006-01-11 | 2007-01-11 | 磁共振成像装置和磁共振成像方法 |
CNB2007100016796A CN100522054C (zh) | 2006-01-11 | 2007-01-11 | 磁共振成像装置和磁共振成像方法 |
US12/458,003 US8143888B2 (en) | 2006-01-11 | 2009-06-29 | Magnetic resonance imaging apparatus and method |
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JP2006004019A JP4896526B2 (ja) | 2006-01-11 | 2006-01-11 | 磁気共鳴イメージング装置 |
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JP2011126577A Division JP5389103B2 (ja) | 2011-06-06 | 2011-06-06 | 磁気共鳴イメージング装置 |
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JP2007185250A true JP2007185250A (ja) | 2007-07-26 |
JP4896526B2 JP4896526B2 (ja) | 2012-03-14 |
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US (2) | US7570050B2 (ja) |
JP (1) | JP4896526B2 (ja) |
CN (2) | CN101493507B (ja) |
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Cited By (17)
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JP2007301295A (ja) * | 2006-05-15 | 2007-11-22 | Hitachi Medical Corp | 磁気共鳴イメージング装置 |
US8971992B2 (en) | 2007-05-07 | 2015-03-03 | Kabushiki Kaisha Toshiba | Magnetic resonance imaging apparatus and control method thereof |
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JP2010094238A (ja) * | 2008-10-15 | 2010-04-30 | Toshiba Corp | 磁気共鳴映像装置 |
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JP2013075199A (ja) * | 2013-01-28 | 2013-04-25 | Toshiba Corp | 磁気共鳴映像装置 |
JP2013198795A (ja) * | 2013-07-08 | 2013-10-03 | Toshiba Corp | 磁気共鳴映像装置 |
JP2013230386A (ja) * | 2013-07-08 | 2013-11-14 | Toshiba Corp | 磁気共鳴映像装置 |
JP2014237035A (ja) * | 2014-08-13 | 2014-12-18 | 株式会社東芝 | 磁気共鳴映像装置 |
JP2019092593A (ja) * | 2017-11-17 | 2019-06-20 | キヤノンメディカルシステムズ株式会社 | 磁気共鳴イメージング装置 |
JP7156789B2 (ja) | 2017-11-17 | 2022-10-19 | キヤノンメディカルシステムズ株式会社 | 磁気共鳴イメージング装置 |
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US8143888B2 (en) | 2012-03-27 |
US20070159172A1 (en) | 2007-07-12 |
US7570050B2 (en) | 2009-08-04 |
CN101493507B (zh) | 2012-11-28 |
CN101493507A (zh) | 2009-07-29 |
CN100998504A (zh) | 2007-07-18 |
CN100522054C (zh) | 2009-08-05 |
JP4896526B2 (ja) | 2012-03-14 |
US20100026295A1 (en) | 2010-02-04 |
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