Method and magnetic resonance tomography apparatus for...

Details Method and magnetic resonance tomography apparatus for... Method and magnetic resonance tomography apparatus for...

2006-05-02

2006-05-02

Arana, Louis (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

C324S309000

Reexamination Certificate

active

07038453

ABSTRACT:
In a method and magnetic resonance tomography apparatus for spatially resolved measurement of the magnetic high frequency field distribution in the apparatus, a double echo high frequency pulse sequence with a first excitation pulse following by at least two refocusing pulses are emitted for generation of a first echo and a following second echo. At least the excitation pulse is slice selective. In an excitation layer defined by the slice selective excitation pulse a first echo image and second echo image are spatially resolved by using suitable gradient pulses for phase or frequency encoding Using the relationships of the amplitudes of the first and second echo image in the various locations the flip angles representing the field strength at the relevant locations in the relevant slice are determined.

REFERENCES:
patent: 5001428 (1991-03-01), Maier et al.
patent: 5416412 (1995-05-01), Slayman et al.
patent: 5914599 (1999-06-01), Sharp
patent: 6268728 (2001-07-01), Morrell
patent: 6289232 (2001-09-01), Jakob et al.

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