Improvement of detection in computed radiography by new single-exposure dual-energy subtraction

Wataru Itoh; Kazuo Shimura; Nobuyoshi Nakajima; Masamitsu Ishida; Hisatoyo Kato

doi:10.1117/12.59448

1 June 1992 Improvement of detection in computed radiography by new single-exposure dual-energy subtraction

Wataru Itoh, Kazuo Shimura, Nobuyoshi Nakajima, Masamitsu Ishida, Hisatoyo Kato

Proceedings Volume 1652, Medical Imaging VI: Image Processing; (1992) https://doi.org/10.1117/12.59448
Event: Medical Imaging VI, 1992, Newport Beach, CA, United States

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.

Citation Download Citation

Wataru Itoh, Kazuo Shimura, Nobuyoshi Nakajima, Masamitsu Ishida, and Hisatoyo Kato "Improvement of detection in computed radiography by new single-exposure dual-energy subtraction", Proc. SPIE 1652, Medical Imaging VI: Image Processing, (1 June 1992); https://doi.org/10.1117/12.59448

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