Magnetic resonance imaging apparatus and method for forming an i

Details Magnetic resonance imaging apparatus and method for forming an i Magnetic resonance imaging apparatus and method for forming an i

1993-02-23

1994-09-20

Smith, Ruth S.

Surgery

Truss

Pad

324306, A61B 5055

Patent

active

053480120

ABSTRACT:
A gradient field is applied in a coronal scheme such that a slice region along the flowing direction of a blood vessel, i.e., along the body axis is set as an imaging area. Of regions adjacent to the imaging region in the body axis direction, a region including a blood vessel as a target of imaging (in this case, an artery) through which the blood flows toward the imaging region is not excited, but only the imaging region is selectively excited. Then, since a spin in the artery is supplied to the imaging region in a fresh state, the image of this spin is formed with a signal level higher than that of a stationary spin remaining in the imaging region. Since the presaturated blood in the artery in the imaging region is returned at its peripheral portion to flow through the vein, the spin in the vein is already saturated, its signal level is lower than that of the spin in the artery, and the image of this spin is not formed. As a result, the image of the state of the artery can be formed within a short period of time.

REFERENCES:
patent: 4947837 (1990-08-01), Sano et al.

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