X-ray generator with a limiting device
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United States of America Patent
Stats
-
Apr 15, 2003
Grant Date -
N/A
app pub date -
Sep 26, 2000
filing date -
Oct 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An X-ray tube (3) is rotated about its focal point along a plane perpendicular to a body axis of a patient by an X-ray tube rotation driver and thus the X-ray irradiation field moves. When the side of the X-ray irradiation field reaches an edge detector (6a) in the edge part of the flat panel detector, the edge detector detects X-ray and provides a signal to a controller. The controller controls the X-ray limiting device (4a) to move shield blades thereof to limit the range of the X-ray irradiation field. The above structure makes it possible to move the center of the X-ray irradiation field without moving the patient and also to prevent the X-ray irradiation field from going outside of the flat panel detector.
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