Methods for NMR angiography

Details Methods for NMR angiography Methods for NMR angiography

1986-03-03

1987-12-22

Kamm, William E.

Surgery

Truss

Pad

324306, 324309, A61B 505

Patent

active

047140810

ABSTRACT:
Magnetic field gradient and radio-frequency (RF) pulse signal sequences permitting moving nuclear spins to be selectively detected and then displayed as projected angiographic data in a nuclear magnetic resonance (NMR) image, without the use of contrast agents. The method allows the intensity of an image pixel to be determined by the macroscopic detected spin velocity and can provide essentially complete suppression of non-moving spins. Resulting images have high signal-intensity dynamic range for detected vessels. The selected detection of moving flows is not dependent upon pulsatile flow so that venous and arterial structures are equally as well visualized in high-resolution NMR angiographic images.

REFERENCES:
patent: 4521733 (1985-06-01), Bottomley et al.
patent: 4528985 (1985-07-01), Macouski
patent: 4532473 (1985-07-01), Wehrli
patent: 4587489 (1986-05-01), Wenrli
patent: 4595879 (1986-06-01), Lent et al.
patent: 4602641 (1986-07-01), Feinberg
patent: 4609872 (1986-09-01), O'Donnell

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