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A time‐delay integration charge‐coupled device camera for slot‐scanned digital radiography
Author(s) -
Holdsworth D. W.,
Gerson R. K.,
Fenster A.
Publication year - 1990
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596578
Subject(s) - time delay and integration , image intensifier , charge coupled device , optics , digital radiography , image resolution , dynamic range , detective quantum efficiency , physics , image sensor , digital camera , professional video camera , computed radiography , digital mammography , image quality , computer science , radiography , mammography , computer vision , image (mathematics) , medicine , telecommunications , high definition television , cancer , breast cancer , nuclear physics
We have developed a low‐noise digital camera based on a 512×96 element CCD operating in the time‐delay integration mode. This camera has been combined with an x‐ray image intensifier to record radiographic images produced by a scanning slot beam of radiation. This results in the rejection of a large fraction of scattered radiation, without a significant increase in x‐ray tube heat loading or image acquisition time. Here we describe the design of our CCD camera and the results of our investigations of camera resolution, linearity, noise, and quantum efficiency. We have found that both the resolution limit (50 mm −1 ) and the dynamic range (2100) of this novel camera are greater than reported values for conventional video cameras. Applications of this system in digital angiography and mammography are discussed.