Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1987-09-14
1989-08-15
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324312, G01R 3320
Patent
active
048578479
ABSTRACT:
The magnetic resonance (MR) imaging system, in which magnetic resonance is caused on the spin of a specific nucleus using a gradient field and a excitation pulse, and, through observation of an MR signal, an image representing the density distribution of that nucleus in a target region of a body is attained, provides at least one of a density distribution image of protons in water of the body and that of protons in the body's fat. First image data comprising complex image data representing the distribution of the spin in a water phantom and second image data comprising complex image data representing the spin distribution in the body are obtained. The first and second image data are acquired in the excitation sequence in which the phase of the MR signal for the water protons is opposite to that of the fat protons. By comparing the first and second image data, it is discriminated which one of the densities of water and fat protons in the second image data is dominant. Based on the discrimination result, the distortion component of the static field in the second image data is compensated for.
REFERENCES:
patent: 4716368 (1987-12-01), Haacke
patent: 4720679 (1988-01-01), Patrick et al.
patent: 4739265 (1988-04-01), Yamamoto et al.
"Simple Proton Spectroscopic Imaging.sup.1 ", W. Thomas Dixon, Ph.D., Radiology, 1984; 153: pp. 189-194.
Kabushiki Kaisha Toshiba
Levy Stewart J.
O'Shea Kevin D.
LandOfFree
Method and system for magnetic resonance imaging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for magnetic resonance imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for magnetic resonance imaging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-124211