X-Ray focal spot movement compensation system

Details X-Ray focal spot movement compensation system X-Ray focal spot movement compensation system

1994-11-22

1996-08-27

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, G01N 2300

Patent

active

055508863

ABSTRACT:
An apparatus for compensating for drift of the focal spot of an X-ray radiation source used in a tomography system is disclosed so as to maintain a primary collimated beam of radiation emanating from the focal spot aligned with target detectors of the tomography system. A second collimated beam of radiation is produced from the same focal spot and directed along a different axis from the first beam. An array of detectors track the movement of the second collimated beam and produce signals which are used to reposition the collimator used to collimate the primary beam so as to maintain the primary beam substantially aligned with the target detectors.

REFERENCES:
patent: 3778614 (1973-12-01), Hounsfield
patent: 4145610 (1979-03-01), Perilhou
patent: 4547893 (1985-10-01), Gordon
patent: 4769827 (1988-09-01), Uno et al.
patent: 4991189 (1991-02-01), Boomgaarden et al.
patent: 5228069 (1993-07-01), Arenson et al.

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