Apparatus and method for reducing X-ray grid line artifacts

Details Apparatus and method for reducing X-ray grid line artifacts Apparatus and method for reducing X-ray grid line artifacts

1993-09-30

1994-10-18

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Antiscatter grid

378154, G21K 100

Patent

active

053575547

ABSTRACT:
A X-ray imaging system has a moveable grid which rejects X-rays that were scattered by a body being imaged. During an X-ray exposure the grid is reciprocated to blur the shadow of the grid in the image. Upon commencement of an X-ray exposure, the grid is moved at decreasing rate in a first direction toward an end point of travel. When the grid is near the end point, the movement rate increases and continues at this faster rate before and after the grid reverses direction at the end point. A given distance after the direction reversal, the rate decreases to a slow constant rate.

REFERENCES:
patent: 4970398 (1990-11-01), Scheid
patent: 5040202 (1991-08-01), Scheid
patent: 5212719 (1993-05-01), Verta et al.

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