Method and apparatus for phase calibration of an MRI pulse

Details Method and apparatus for phase calibration of an MRI pulse Method and apparatus for phase calibration of an MRI pulse

2007-08-06

2009-02-17

Shrivastav, Brij B (Department: 2831)

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

C324S307000

Reexamination Certificate

active

07492155

ABSTRACT:
The present invention concerns a method and an apparatus for phase-calibrating an MRI pulse sequence which is used to calculate a linear phase and a constant phase to perform phase calibration on the scanned data, wherein a corresponding pre-scan without a phase encoding gradient is performed before a diagnostic scan. A reference echo is selected from the echoes obtained in the pre-scan. On the basis of the reference echo the constant phase is calculated to be used in performing the phase calibration in the scan. The constant phase that is obtained is correct and not affected by phase jumping. A further image reconstruction performed on the phase-calibrated data produces clear and artifact-free images.

REFERENCES:
patent: 5537039 (1996-07-01), Le Roux et al.
patent: 6289232 (2001-09-01), Jakob et al.
patent: 6469505 (2002-10-01), Maier et al.
patent: 6528998 (2003-03-01), Zhou et al.

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