Magnetic resonance imaging apparatus and imaging method

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United States of America Patent

PATENT NO 6169398
SERIAL NO

09115720

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The MRI apparatus of the present invention performs a pulse sequence for applying successively 180.degree. pulses 102, 103 . . . after application of a 90.degree. pulse 101 at constant intervals and applying readout magnetic fields 111 during the interval between pairs of 180.degree. pulses while the polarity of the magnetic field 111 is inverted several times to collect a plurality of gradient echo signals that are phase encoded differently. Here, the application of the readout gradient magnetic field is controlled such that generation of the gradient echo signals does ot coincide with generation of the spin echo signal. The image reconstruction is performed by using only T2* weighted gradient echo signals to obtain images reflecting difference in magnetic susceptibility and inhomogeneities in local magnetic fields.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI MEDICAL CORPORATIONTOKYO210

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Takahashi, Tetsuhiko Souka, JP 86 903
Watanabe, Shigeru Ibaraki-ken, JP 133 1233

Cited Art Landscape

Patent Info (Count) # Cites Year
 
KABUSHIKI KAISHA TOSHIBA (1)
* 5779636 Method of echo volume imaging and MRI system using the same 17 1995
* Cited By Examiner

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (12)
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* 2002/0103,429 Methods for physiological monitoring, training, exercise and regulation 93 2002
* 2005/0033,154 Methods for measurement of magnetic resonance signal perturbations 46 2004
7567693 Methods for physiological monitoring training, exercise and regulation 9 2005
* 2006/0078,183 Methods for physiological monitoring training, exercise and regulation 11 2005
* 2008/0001,600 METHODS FOR MEASUREMENT OF MAGNETIC RESONANCE SIGNAL PERTURBATIONS 69 2007
* 2009/0163,982 APPLICATIONS OF THE STIMULATION OF NEURAL TISSUE USING LIGHT 68 2008
* 2009/0179,642 METHODS FOR MEASUREMENT OF MAGNETIC RESONANCE SIGNAL PERTURBATIONS 14 2009
* 2009/0299,169 METHODS FOR PHYSIOLOGICAL MONITORING, TRAINING, EXERCISE AND REGULATION 0 2009
* 2009/0318,794 METHODS FOR MEASUREMENT AND ANALYSIS OF BRAIN ACTIVITY 11 2009
* 2011/0301,448 Methods for measurement of magnetic resonance signal perturbations 3 2011
* 2012/0021,394 METHODS FOR PHYSIOLOGICAL MONITORING, TRAINING, EXERCISE AND REGULATION 4 2011
 
SIEMENS HEALTHCARE GMBH (1)
* 7501821 Method for determination of the transverse relaxation time T2* in MR data 0 2006
 
THE GENERAL HOSPITAL CORPORATION (2)
* 8981776 Method for magnetic resonance imaging with controlled aliasing 2 2012
* 2013/0099,784 Method for Magnetic Resonance Imaging with Controlled Aliasing 4 2012
 
KONINKLIJKE PHILIPS ELECTRONICS N.V. (1)
* 2005/0240,095 Variable flip angle, sar-reduced state free precession mri acquisition 3 2004
 
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC (4)
6703834 Systems and methods for correcting phase errors 3 2002
6940280 Systems and methods for manipulating changes in phase encodes 2 2002
* 2002/0149,366 Data collection method and MRI system 0 2002
6771069 Systems and methods for achieving a recovery of spins of nuclei 2 2002
 
HITACHI, LTD. (4)
7877129 Magnetic resonance imaging apparatus and RF reception coil apparatus 1 2002
* 2005/0033,150 Medicinal composition 35 2004
8466679 Magnetic resonance imaging apparatus and method configured for susceptibility-emphasized imaging with improved signal-to-noise ratio 1 2008
* 2010/0277,172 MAGNETIC RESONANCE IMAGING APPARATUS AND SUSCEPTIBILITY-EMPHASIZED IMAGING METHOD 5 2008
 
DeCharms, R. Christopher (1)
* 2011/0015,515 Methods For Physiological Monitoring, Training, Exercise And Regulation 0 2010
* Cited By Examiner