Basic investigation of dual-energy x-ray absorptiometry for bone densitometry using computed radiography

Kazuo Shimura; Nobuyoshi Nakajima; Hiroshi Tanaka; Masamitsu Ishida; Hisatoyo Kato

doi:10.1117/12.154582

14 September 1993 Basic investigation of dual-energy x-ray absorptiometry for bone densitometry using computed radiography

Kazuo Shimura, Nobuyoshi Nakajima, Hiroshi Tanaka, Masamitsu Ishida, Hisatoyo Kato

Author Affiliations +

Proceedings Volume 1896, Medical Imaging 1993: Physics of Medical Imaging; (1993) https://doi.org/10.1117/12.154582
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

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.

Citation Download Citation

Kazuo Shimura, Nobuyoshi Nakajima, Hiroshi Tanaka, Masamitsu Ishida, and Hisatoyo Kato "Basic investigation of dual-energy x-ray absorptiometry for bone densitometry using computed radiography", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); https://doi.org/10.1117/12.154582

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