Magnetic resonance imaging method

Details Magnetic resonance imaging method Magnetic resonance imaging method

1988-03-04

1990-09-04

Smith, Ruth S.

Surgery

Truss

Pad

A61B 5055

Patent

active

049535544

ABSTRACT:
A magnetic resonance imaging (MRI) method imposes void planes on tissue to be imaged, which may form a grid pattern of lines which, when later imaged, produces a reference void in the image. This is especially useful in studies of the heart where the contraction and relaxation of the heart can thus be measured. Also for static tissue the method is useful for radiation therapy port planning. The grid reference or void planes are formed by a simple use of an RF pulse in conjunction with the use of a slice select gradient which provides sufficient power so that those protons in the grid are saturated so that in the later imaging step there will be significant spin echo signal difference between the grid imposed areas and the remaining regions of the tissue.

REFERENCES:
patent: 4382184 (1983-05-01), Wernikoff
patent: 4520828 (1985-06-01), Burl et al.
patent: 4528985 (1985-07-01), Macovski
patent: 4532473 (1985-07-01), Wehrli
patent: 4574239 (1986-03-01), Singer
patent: 4625169 (1986-11-01), Wedeen et al.
patent: 4782839 (1988-11-01), Hennig et al.

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