MR examining apparatus of heart beat synchronous type

Details MR examining apparatus of heart beat synchronous type MR examining apparatus of heart beat synchronous type

1988-12-02

1990-09-25

Howell, Lyle L.

Surgery

Truss

Pad

324309, 324322, 128696, A61B 505

Patent

active

049586378

ABSTRACT:
A magnetic resonance examining apparatus of heart beat synchronous type in which one heart beat period is substantially equally divided to provide a plurality of phases, and at least some of those phases are selected as imaging phases so as to obtain nuclear magnetic resonance images. In the apparatus, spin excitation is effected at all the phases including those where nuclear magnetic resonance images are obtained and those where nuclear magnetic resonance images are not obtained, so that all the phases have the same longitudinal relaxation time after spin excitation. Therefore, nuclear magnetic resonance signals free from variations of the longitudinal relaxation time can be obtained to provide clear nuclear magnetic resonance images at anyone of the plurality of phases.

REFERENCES:
patent: 4567893 (1986-02-01), Charles et al.
patent: 4602641 (1986-07-01), Feinberg
patent: 4709212 (1987-11-01), MacFall et al.
patent: 4714081 (1987-12-01), Dumoulin et al.
patent: 4716368 (1987-12-01), Haake
patent: 4717879 (1988-01-01), Riederer et al.
patent: 4727882 (1988-03-01), Schneider et al.

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