Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1996-01-16
1998-05-26
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01N 2450
Patent
active
057571880
ABSTRACT:
A magnetic resonance imaging apparatus includes a static magnetic field forming magnet, an RF coil and a transmitter/receiver adapted to transmit a 90.degree. rf pulse and a 180.degree. rf pulse in turn to a human body under examination and receive an echo signal from the human body, gradient magnetic field forming coils and gradient magnetic field power supplies adapted to form a first slice selection gradient magnetic field simultaneously with the 90.degree. rf pulse and a second slice selection gradient magnetic field simultaneously with the 180.degree. rf pulse, a computer system adapted to reconstruct a magnetic resonance image from the echo signal, and a display unit adapted to visualize the reconstructed magnetic resonance image. The frequency bandwidth of the 90.degree. rf pulse is adjusted so that a region in which proton spins in water are excited and a region in which proton spins in fat are excited will not overlap each other. The first and second slice selection magnetic fields are made opposite in polarity to each other. Water proton spins that have been subjected to the 90.degree. rf pulse will also be subjected to the 180.degree. rf pulse, thereby producing a magnetic resonance signal. Fat proton spins that have been subjected to the 90.degree. rf pulse will not be subjected to the 180.degree. rf pulse. The fat proton spins will not produce a magnetic resonance signal.
REFERENCES:
patent: 4902973 (1990-02-01), Keren
patent: 5189371 (1993-02-01), Conolly et al.
patent: 5225781 (1993-07-01), Glover et al.
patent: 5510713 (1996-04-01), Bernstein
patent: 5528145 (1996-06-01), Hirata et al.
Eisenberg Michael
Kabushiki Kaisha Toshiba
O'Shea Sandra L.
LandOfFree
Magnetic resonance imaging apparatus with fat signal suppression does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic resonance imaging apparatus with fat signal suppression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic resonance imaging apparatus with fat signal suppression will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1965817