title: Improvement of detection in computed radiography by new single-exposure dual-energy subtraction.
abstract: It is reported that the use of the dual-energy subtraction method enhances the abnormal shadow detection capability. However, because 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 focus 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 propose an algorithm that improves SNRs of subtraction images by reducing the noise only.
authors.affiliation: Miyanodai Technology Development Center, Fuji Photo Film Company, Ltd, Kanagawa, Japan.
authors.forename: W
authors.initials: W
authors.lastname: Ito
authors.forename: K
authors.initials: K
authors.lastname: Shimura
authors.forename: N
authors.initials: N
authors.lastname: Nakajima
authors.forename: M
authors.initials: M
authors.lastname: Ishida
authors.forename: H
authors.initials: H
authors.lastname: Kato
mesh_terms: D000465:Algorithms; D006801:Humans; D008961:Models, Structural; D015900:Radiography, Dual-Energy Scanned Projection; D013902:Radiography, Thoracic / Q000379:methods*