Selective excitation method of nuclear spins in magnetic resonan

Details Selective excitation method of nuclear spins in magnetic resonan Selective excitation method of nuclear spins in magnetic resonan

1994-03-14

1995-01-31

Wieder, Kenneth A.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

1286532, G01R 3320

Patent

active

053861906

ABSTRACT:
A slice selective excitation method of nuclear spins in an MRI apparatus comprising applying a first gradient magnetic field (B+G.sub.s1) to a patient in a predetermined direction, exciting nuclear spins in a first slice selection region of the patient by a first radio frequency pulse, applying then a second gradient magnetic field (B+G.sub.s2) different from the first gradient magnetic field (B+G.sub.s1) in the predetermined direction, exciting a second slice selection region overlapping at least partially with the first slice selection region by irradiating thereto a second radio frequency pulse so as to excite once again the nuclear spin excited by the first radio frequency pulse, and generating NMR signals effective for image reconstruction from only the overlapping portion of the slice selection regions.

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