Scan-type X-ray imaging with fixed converter

Details Scan-type X-ray imaging with fixed converter Scan-type X-ray imaging with fixed converter

1995-12-08

1997-04-01

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Scanner

378 983, G21K 510

Patent

active

056174659

ABSTRACT:
A scan-type X-ray imaging system and method are disclosed. Image detection is effected by use of a fixed phosphor converter screen covering the entire field of view so that X-rays passed through an object, or a body portion, positioned at a scan area, are received at the converter screen and light signals, proportional to the received X-rays, are coupled through a movable coupler, having an input portion movably engaging the converter screen, to a movable sensor that converts received light signals to electrical output signals indicative of the object, or body portion, then at the scan area. The input face of the coupler, preferably a fiber optic coupler, is held in positive engagement with the converter screen throughout movement of the coupler relative to the converter screen by a force, such as by an air cushion between the object, or body portion, positioner and the converter screen, by establishing a vacuum between the input face of the coupler and the converter screen, and/or by springs biasing the coupler face plate toward engagement with the converter screen.

REFERENCES:
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patent: 5142557 (1992-08-01), Toker et al.
patent: 5216250 (1993-06-01), Pellegrino et al.
patent: 5289520 (1994-02-01), Pellegrino et al.

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