Magnetic resonance method for reducing residual magnetization and adjusting the amplitude of gradient pulses

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United States of America Patent

PATENT NO 6483305
SERIAL NO

09597527

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Abstract

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In order to reduce residual magnetization caused by gradient pulses, for a gradient pulse having either a positive or negative polarity, a residual magnetization reducing pulse is applied after applying the gradient pulse, or for two or more successively applied gradient pulses having different polarities, the amplitude of the gradient pulse(s) is adjusted to reduce residual magnetization thereafter.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GE HEALTHCARE JAPAN CORPORATIONTOKYO51

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miyamoto, Shoei Tokyo, JP 9 45

Cited Art Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (3)
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* 6043656 Method for compensating an MRI system for residual magnetization 12 1998
 
Picker International, Inc. (2)
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SIEMENS HEALTHCARE GMBH (1)
* 6400151 Method and apparatus for the acquisition of data for magnetic resonance imaging 26 2000
 
GE HEALTHCARE JAPAN CORPORATION (3)
* 5729139 MRI apparatus 15 1996
* 6127825 Method of phase shift measurement, method of phase correction, and MRI apparatus 15 1997
* 6218834 Method of shift measurement, method of phase shift correction, and MRI apparatus 16 2000
 
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC (1)
* 2002/0050,816 MR imaging method, phase error measuring method, and MRI apparatus 4 2001
* Cited By Examiner

Patent Citation Ranking

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TOSHIBA MEDICAL SYSTEMS CORPORATION (6)
* 7110805 Magnetic resonance imaging for a plurality of selective regions set to object continuously moved 7 2001
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* 2006/0184,004 Magnetic resonance imaging for a plurality of selective regions set to object continuously moved 3 2006
* 8487614 Magnetic resonance imaging apparatus/method counter-actively suppressing remnant eddy current magnetic fields generated from gradients applied before controlling contrast pre-pulses and MRI image data acquisition 4 2009
* 2010/0148,774 MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD 6 2009
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (2)
* 7046003 Reduced-time variable rate excitation pulses for rapid MRI 7 2004
* 2006/0061,358 REDUCED-TIME VARIABLE RATE EXCITATION PULSES FOR RAPID MRI 1 2004
 
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC (3)
* 6628116 Process and apparatus to remove stimulated echo artifacts caused by interactions of a preparation sequence with a gradient echo sequence in MR imaging 5 2001
* 6696835 Second-order static magnetic field correcting method and MRI apparatus 2 2001
* 2008/0136,411 MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD 4 2007
 
HITACHI, LTD. (3)
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* Cited By Examiner