Collimator for reducing patient x-ray dose

Details Collimator for reducing patient x-ray dose Collimator for reducing patient x-ray dose

1995-12-21

1997-07-01

Wong, Don

X-ray or gamma ray systems or devices

Beam control

Collimator

378 4, 378145, G21K 102

Patent

active

056446144

ABSTRACT:
The present invention, in one form, is a pre-patient collimator for reducing patient x-ray dose during a scan with a computed tomography system. The collimator has a contoured aperture for emitting a generally rectangular shaped x-ray fan beam. The fan beam approximates the rectangular shape of x-ray detectors which gather data for producing an image.

REFERENCES:
patent: 4975933 (1990-12-01), Hampel
patent: 4991189 (1991-02-01), Boomgaarden et al.
patent: 5054041 (1991-10-01), Hampel
patent: 5231654 (1993-07-01), Kwasnick et al.
patent: 5231655 (1993-07-01), Wei et al.
patent: 5293417 (1994-03-01), Wei et al.
patent: 5377252 (1994-12-01), Liebetruth
patent: 5493599 (1996-02-01), Mattson
Crawford et al., "Computed tomography scanning with simultaneous patient translation", Medical Physics, vol. 17, No. 6, Nov./Dec. 1990, pp. 967-982 .

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