High temporal resolution black blood cine imaging

Details High temporal resolution black blood cine imaging High temporal resolution black blood cine imaging

1992-03-27

1995-09-05

Zele, Krista M.

Surgery

Truss

Pad

1286533, A61B 5055

Patent

active

054471559

ABSTRACT:
During a cardiac cine examination, a multiplicity of imaging sequences, each about 20 msec long, are applied following the R-wave. Each imaging sequence includes a saturation portion in which a bi-modal pre-saturation pulse (38) and a spoiler gradient (56) are applied. The bi-modal RF pulse has a relatively low tip angle, about 50.degree., but is repeated sufficiently often that blood in regions (30a, 30b) parallel to a selected slice (32) are driven toward saturation. Each imaging sequence further includes a gradient echo or other conventional imaging sequence during an imaging portion to generate magnetic resonance data (60). Each imaging sequence is repeated twice for each temporal interval with the same phase encoding, but once with the relative phase of the signal in the slice and the relative phase of the signals from within the pair of regions (30a, 30b) reversed. These two signals are combined such that the signals from within the slice add and the signals from with the pair of regions subtract. Signals corresponding to the same temporal interval after the R-wave with each of a multiplicity of phase encodings are reconstructed (82) into an image representations (84) for display on a video monitor (96).

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