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Proceedings Paper

Basic investigation of dual-energy x-ray absorptiometry for bone densitometry using computed radiography
Author(s): Kazuo Shimura; Nobuyoshi Nakajima; Hiroshi Tanaka; Masamitsu Ishida; Hisatoyo Kato
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Paper Abstract

Dual-energy X-ray absorptiometry (DXA) is one of the bone densitometry techniques to diagnose osteoporosis, and has been gradually getting popular due to its high degree of precision. However, DXA involves a time-consuming examination because of its pencil-beam scan, and the equipment is expensive. In this study, we examined a new bone densitometry technique (CR-DXA) utilizing an X-ray imaging system and Computed Radiography (CR) used for medical X-ray image diagnosis. High level of measurement precision and accuracy could be achieved by X-ray rube voltage/filter optimization and various nonuniformity corrections based on simulation and experiment. The phantom study using a bone mineral block showed precision of 0.83% c.v. (coefficient of variation), and accuracy of 0.01 g/cm2, suggesting that a practically equivalent degree of measurement precision and accuracy to that of the DXA approach is achieved. CR-DXA is considered to provide bone mineral densitometry to facilitate simple, quick and precise bone mineral density measurement.

Paper Details

Date Published: 14 September 1993
PDF: 9 pages
Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154582
Show Author Affiliations
Kazuo Shimura, Fuji Photo Film Co., Ltd. (Japan)
Nobuyoshi Nakajima, Fuji Photo Film Co., Ltd. (Japan)
Hiroshi Tanaka, Fuji Photo Film Co., Ltd. (Japan)
Masamitsu Ishida, Fuji Photo Film Co., Ltd. (Japan)
Hisatoyo Kato, Fuji Photo Film Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 1896:
Medical Imaging 1993: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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