Method and apparatus for MR imaging

Details Method and apparatus for MR imaging Method and apparatus for MR imaging

1986-08-14

1990-02-27

Smith, Ruth S.

Surgery

Truss

Pad

128696, A61B 505

Patent

active

049037048

ABSTRACT:
An MR imaging method and apparatus especially adapted for invivo cardiac MR imaging, rejects data acquired during periods of arrhythmia while maintaining the magnetic fields and pulsing of the RF coils during such periods. Data acquisition is resumed after M cycles of regular period, and after remeasuring the data acquired during N cycles prior to the occurrence of the arrhythmia, where M and N are integers preferably from 1 to 5. The average timing can periodically be recalculated in order to compensate for slow changes in cardiac rate.

REFERENCES:
patent: 4245647 (1981-01-01), Randall
patent: 4602641 (1986-07-01), Feinberg
patent: 4649930 (1987-03-01), Groch et al.
McRobbie et al, "Cardiac Response to Pulsed Magnetic Fields with Regard to Safety in NMR Imaging", Phy. Med. Biol 1985 vol. 30, No. 7 pp. 695-702.
Runge et al, "Respiratory Gating in Magnetic Resonance Imaging, at 0.5 Tesla", Radiology 1984 vol. 151 pp. 521-523.

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