Flow imaging method by means of an MRI apparatus and apparatus f

Details Flow imaging method by means of an MRI apparatus and apparatus f Flow imaging method by means of an MRI apparatus and apparatus f

1991-01-29

1993-03-23

Cohen, Lee S.

Surgery

Truss

Pad

324306, 324309, A61B 5055

Patent

active

051955245

ABSTRACT:
An MRI flow imaging method and apparatus wherein a width of a relevant region in a direction is set, in which fluid in a subject body flows, and a first 90.degree. radio frequency pulse is applied thereto to excite selectively a relevant region; a gradient magnetic field is applied thereto in a direction, in which it is desired to project the fluid, after an application of a first 90.degree. radio frequency pulse so that a magnetization signal in a projection direction is zero, a second radio frequency pulse is applied to a relevant region to excite the relevant region selectively, after new fluid has poured in the relevant region, an echo signal is measured by applying an encoding gradient magnetic field and a reading out gradient magnetic field in a form of a flow sensitive pulse capable of detecting an echo signal from the fluid, and an echo signal is processed to obtain a two-dimensional image of the fluid.

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patent: 4949042 (1990-08-01), Kuhara et al.
Nishimura et al., "MR Angiography by Selective Inversion Recovery", Magnetic Resonance in Medicine, vol. 4, pp. 193-202, 1987.

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