Automatic grid oscillation control for radiographic imaging syst

Details Automatic grid oscillation control for radiographic imaging syst Automatic grid oscillation control for radiographic imaging syst

1993-08-09

1995-01-03

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Antiscatter grid

378154, G21K 100

Patent

active

053793358

ABSTRACT:
A radiographic imaging system is comprised of a radiation source 12, a radiation adsorbing grid assembly 18, an image producing element 22 a controller 34, an exposure sequence start means 28 and a grid assembly oscillation means 20. The radiation source and grid define a subject receiving gap, wherein an object under examination is disposed, and through which the source propagates a beam of radiation onto the face of the image producing element. The controller recognizes when the exposure sequence start means is activated and starts the exposure sequence. The exposure sequence is comprised of an exposure preparation interval and an exposure interval. The exposure preparation interval is comprised of a radiation source preparation time and a point-in-time when the grid assembly oscillation commences oscillating the grid assembly. The point-in-time when the grid assembly oscillation commences occurs relative to the start of the exposure preparation interval to minimize the formation of gird lines on the image producing element.

REFERENCES:
patent: 2486089 (1949-10-01), Zavales
patent: 2767323 (1956-10-01), Stava et al.
patent: 4380086 (1983-04-01), Vagi
patent: 4803716 (1989-02-01), Ammann et al.

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