RF pulse applying method and MRI apparatus

Details RF pulse applying method and MRI apparatus RF pulse applying method and MRI apparatus

2008-07-29

2008-07-29

Arana, Louis M (Department: 2831)

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

C324S309000

Reexamination Certificate

active

11470821

ABSTRACT:
The effects of prior pulses are to be enhanced. A pulse string which monotonically decreases the flip angle is inserted between the prior pulse in one round and the imaging pulse in the previous round, and a pulse string which monotonically increases the flip angle is inserted between the prior pulse and the imaging pulse in one round. A return from the steady state to the equilibrium state can be achieved not only for on-resonance magnetization but also for off-resonance magnetization before the prior pulse is applied. Therefore, the effects of the prior pulse P can be fully attained. Further, not only on-resonance magnetization but also off-resonance magnetization can be brought close to the steady state before the imaging pulse is applied.

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Klaus Scheffler, et al.; Magnetization Preparation During the Steady State: FAT-Saturated 3D TrueFISP; Magnetic Resonance in Medicine 45:1075-1080 (2001).

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