CN104736050B - 磁共振成像装置以及sar的预测方法 - Google Patents
磁共振成像装置以及sar的预测方法 Download PDFInfo
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- CN104736050B CN104736050B CN201380054221.0A CN201380054221A CN104736050B CN 104736050 B CN104736050 B CN 104736050B CN 201380054221 A CN201380054221 A CN 201380054221A CN 104736050 B CN104736050 B CN 104736050B
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- sar
- magnetic field
- coil
- values
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
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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
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
-
- 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
- G01R33/34092—RF coils specially adapted for NMR spectrometers
-
- 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
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
-
- 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
- G01R33/5608—Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- General Health & Medical Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Signal Processing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Medical Informatics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012254112 | 2012-11-20 | ||
JP2012-254112 | 2012-11-20 | ||
PCT/JP2013/080373 WO2014080781A1 (ja) | 2012-11-20 | 2013-11-11 | 磁気共鳴イメージング装置、及び、sarの予測方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN104736050A CN104736050A (zh) | 2015-06-24 |
CN104736050B true CN104736050B (zh) | 2017-08-01 |
Family
ID=50775965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201380054221.0A Active CN104736050B (zh) | 2012-11-20 | 2013-11-11 | 磁共振成像装置以及sar的预测方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US10534048B2 (zh) |
JP (1) | JP6162142B2 (zh) |
CN (1) | CN104736050B (zh) |
WO (1) | WO2014080781A1 (zh) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012215255B3 (de) * | 2012-08-28 | 2014-02-27 | Siemens Aktiengesellschaft | Ansteuerung eines Magnetresonanzsystems unter Berücksichtigung aktueller komponentenbedingter B1-Feld-Maximalwerte |
US10156615B2 (en) | 2014-07-14 | 2018-12-18 | Hitachi, Ltd. | Magnetic resonance imaging apparatus, Q-value calculation method, and specific absorption rate management method |
JP6454157B2 (ja) * | 2015-01-20 | 2019-01-16 | 株式会社日立製作所 | 磁気共鳴イメージング装置及びq値算出方法 |
CN107280669B (zh) * | 2016-03-31 | 2020-10-16 | 上海联影医疗科技有限公司 | 磁共成像的sar值确定方法及磁共振成像装置 |
JP6721383B2 (ja) * | 2016-04-04 | 2020-07-15 | 株式会社日立製作所 | 磁気共鳴イメージング装置 |
CN105974208B (zh) * | 2016-05-10 | 2019-02-12 | 上海理工大学 | 核磁共振仪下比吸收率的测量系统 |
EP3454072A1 (de) * | 2017-09-06 | 2019-03-13 | Siemens Healthcare GmbH | Justierung einer mr-steuerungssequenz für eine magnetresonanzuntersuchung eines untersuchungsobjektes |
US10794969B2 (en) * | 2018-02-15 | 2020-10-06 | Canon Medical Systems Corporation | RF circuit, MRI apparatus, and method of monitoring RF pulse power |
JP7123767B2 (ja) * | 2018-11-20 | 2022-08-23 | キヤノンメディカルシステムズ株式会社 | 磁気共鳴撮像装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07246194A (ja) * | 1994-03-10 | 1995-09-26 | Ge Yokogawa Medical Syst Ltd | Mr装置 |
JPH11253416A (ja) * | 1998-03-09 | 1999-09-21 | Toshiba Corp | 磁気共鳴イメージング装置 |
US7078899B2 (en) * | 2003-05-15 | 2006-07-18 | Case Western Reserve University | Pareto-optimal magnetic resonance data acquisition |
US20060064002A1 (en) * | 2004-09-20 | 2006-03-23 | Grist Thomas M | Method for monitoring thermal heating during magnetic resonance imaging |
US7737690B2 (en) * | 2007-05-18 | 2010-06-15 | General Electric Company | System and method for amplitude reduction in RF pulse design |
US8717021B2 (en) | 2007-09-07 | 2014-05-06 | The Johns Hopkins University | SAR dosimeter for RF power deposition in MRI and methods and systems related thereto |
WO2010041706A1 (ja) * | 2008-10-08 | 2010-04-15 | 株式会社 日立メディコ | 磁気共鳴イメージング装置 |
US8653818B2 (en) * | 2011-04-08 | 2014-02-18 | Siemens Aktiengesellschaft | Parallel transmission RF pulse design with local SAR constraints |
JP5677908B2 (ja) * | 2011-07-28 | 2015-02-25 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | 磁気共鳴イメージング装置、検出方法、およびプログラム |
US20130063143A1 (en) * | 2011-09-01 | 2013-03-14 | Siemens Aktiengesellschaft | Local SAR Constrained Parallel Transmission RF Pulse in Magnetic Resonance Imaging |
US9500727B2 (en) * | 2012-04-20 | 2016-11-22 | Regents Of The University Of Minnesota | System and method for control of RF circuits for use with an MRI system |
CN104023627A (zh) * | 2012-08-29 | 2014-09-03 | 株式会社东芝 | 磁共振成像装置及其比吸收率的运算方法 |
DE112013005114T5 (de) * | 2012-10-23 | 2015-09-10 | Koninklijke Philips N.V. | Spezifische Apsorptionsraten - Steuerung für die Magnetresonanz - (SAR) Bildgebung |
US10156615B2 (en) * | 2014-07-14 | 2018-12-18 | Hitachi, Ltd. | Magnetic resonance imaging apparatus, Q-value calculation method, and specific absorption rate management method |
-
2013
- 2013-11-11 JP JP2014548514A patent/JP6162142B2/ja active Active
- 2013-11-11 WO PCT/JP2013/080373 patent/WO2014080781A1/ja active Application Filing
- 2013-11-11 CN CN201380054221.0A patent/CN104736050B/zh active Active
- 2013-11-11 US US14/439,819 patent/US10534048B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JPWO2014080781A1 (ja) | 2017-01-05 |
WO2014080781A1 (ja) | 2014-05-30 |
US10534048B2 (en) | 2020-01-14 |
JP6162142B2 (ja) | 2017-07-12 |
US20150293187A1 (en) | 2015-10-15 |
CN104736050A (zh) | 2015-06-24 |
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Date | Code | Title | Description |
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C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C41 | Transfer of patent application or patent right or utility model | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20160721 Address after: Tokyo, Japan, Japan Applicant after: Hitachi Ltd. Address before: Japan Tokyo Chiyoda District Kanda four chome 14 No. 1 Applicant before: Hitachi Medical Corporation |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20211116 Address after: Chiba County, Japan Patentee after: Fujifilm medical health Co., Ltd Address before: Tokyo, Japan Patentee before: Hitachi Manufacturing Co., Ltd |