Method for operating a magnetic resonance imaging apparatus

Details Method for operating a magnetic resonance imaging apparatus Method for operating a magnetic resonance imaging apparatus

1995-08-02

1996-07-30

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3348

Patent

active

055415148

ABSTRACT:
In a steady-state pulse sequence having a repetition time and a flip angle .alpha. with alternating polarity for operating a magnetic resonance imaging apparatus, the excursion of the magnetization in the steady-state condition moves between a first value +.alpha./2 and a second value -.alpha./2. Before the beginning of the pulse sequence, a radiofrequency pulse having a flip angle .alpha./2 is emitted before the first excitation pulse. The steady-state condition is thus reached earlier and a spin preparation can be implemented which is still effective when imaging data are acquired.

REFERENCES:
patent: 4769603 (1988-09-01), Oppelt et al.
patent: 4825159 (1989-04-01), Oppelt et al.
patent: 5019784 (1991-05-01), Garwood et al.
patent: 5034692 (1991-07-01), Laub et al.
patent: 5270654 (1993-12-01), Feinberg et al.
patent: 5345175 (1994-09-01), Kasuboski et al.

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