14 September 1993 High-accuracy x-ray imaging: screen, lens, and CCD
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Abstract
A liquid nitrogen cooled CCD TV camera from Astromed, Ltd. has been used for quantitative X-ray medical imaging. The CCD camera is coupled to a Kodak Lanex Regular X-ray intensifying screen with a 5:1 macro lens for bone mineral densitometry of the femur of a rat for a study of the development of osteoporosis. As a feasibility study of the use of the CCD for mammography, a 2:1 macro lens has been used to couple the CCD to a clear CsI(Tl) crystal, 100 mm in diameter and 3 mm thick. The spatial resolution and quantum efficiency of the system is significantly improved by replacing the Lanex Regular screen with the CsI(Tl) crystal.
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Herbert D. Zeman, Frank A. DiBianca, Donald B. Thomason, Jeno I. Sebes, Gunnar Lovhoiden, D.-Z. Liao, Dona Kambeyanda, "High-accuracy x-ray imaging: screen, lens, and CCD", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154594; https://doi.org/10.1117/12.154594
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