Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1998-03-09
2000-11-07
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324313, 324307, G01V 300
Patent
active
06144202&
ABSTRACT:
A pair of gradient field pulses of the same applied time and the same intensity are applied before and after a radio-frequency (RF) refocusing pulse (180.degree. pulse) as additional gradient field pulses to enhance the phase shift of a transverse magnetization spin, caused by the diffusion of a molecule including a target nuclide. To compensate for image deterioration caused by an unnecessary field distribution which is produced by the additional gradient field pulses, a compensation gradient field pulse dGcp and a compensation offset gradient field dGoffset are applied and a center frequency at the time of receiving and detecting an echo signal is shifted by df.sub.0.
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Stejsakl EO, Tanner JE. Spin Diffusion measurements: spin echoes in the presence of a time dependent field gradient, J. of Chem. Phys 1965, 42:288-292 H.K. Feb. 9, 1998.
Kanazawa Hitoshi
Takai Hiroshi
Fetzner Tiffany A.
Kabushiki Kaisha Toshiba
Oda Christine K.
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