Scanning mammography system with improved skin line viewing

Details Scanning mammography system with improved skin line viewing Scanning mammography system with improved skin line viewing

1991-05-22

1992-11-17

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Scanner

378 37, 378152, G21K 510

Patent

active

051649764

ABSTRACT:
A method and apparatus for improving skin line viewing in a medical X-ray diagnostic system having an X-ray source for generating a scanning X-ray beam to image a target. In one form, the apparatus includes a first collimator positioned in the X-ray beam and having a rectangular shaped slit for passing the beam. A second collimator is positioned adjacent the first collimator and includes a plurality of spaced attenuation plates which can be moved over the slit in the first collimator. The attenuation plates are angles and tapered with respect to the slit. Control means is provided for locating the target within the slit and continuously driving the second collimator attenuation plates so as to intersect the edge of the target aligned with the slit.

REFERENCES:
patent: 4691335 (1987-09-01), Telorack
patent: 4868843 (1989-09-01), Nunan
patent: 4947416 (1990-08-01), McFaul et al.

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