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Proceedings Paper

Improvement of detection in computed radiography by new single-exposure dual-energy subtraction
Author(s): Wataru Itoh; Kazuo Shimura; Nobuyoshi Nakajima; Masamitsu Ishida; Hisatoyo Kato
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Paper Abstract

It is reported that the use of the dual-energy subtraction method enhances the abnormal shadow detection capability. However, as the subtracted image is significantly inferior to the original in signal-to-noise ratio (SNR), the x ray dosage normally used for chest x rays has not yielded subtracted images with adequate SNRs. Under these circumstances, we have concentrated on the fact that there is a correlation between the noise contents of bone and soft- tissue subtracted images although there is no correlation between the signal contents of these images. We now propose an algorithm that improves SNRs of subtraction images by reducing the noise only.

Paper Details

Date Published: 1 June 1992
PDF: 11 pages
Proc. SPIE 1652, Medical Imaging VI: Image Processing, (1 June 1992); doi: 10.1117/12.59448
Show Author Affiliations
Wataru Itoh, Fuji Photo Film Co., Ltd. (Japan)
Kazuo Shimura, Fuji Photo Film Co., Ltd. (Japan)
Nobuyoshi Nakajima, 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. 1652:
Medical Imaging VI: Image Processing
Murray H. Loew, Editor(s)

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