title: [Optimization of the chest exposure condition with a contrast-detail phantom: evaluation of the flat-panel versus computed radiography systems].
abstract: In this study, we evaluated the performance of a digital chest imaging system using a contrast-detail (C-D) phantom. In the initial step, 76 sample images of the C-D phantom were produced by changing the doses from 0.5, 0.75, 1.0, 1.25, 1.5, to 2.0 times the dose for a screen-film (S/F) system. The sample images were analyzed by five radiological technologists and two medical physicists, and the image quality figure (IQF) was determined. The quality of each image was examined, and appropriate doses were determined from the calculated IQF to obtain the same image quality for other digital chest imaging systems. The method of determining IQF from C-D phantom analysis was very useful for comparing image quality and determining radiographic techniques.
authors.affiliation: Department of Radiological Technology, Kyushu University Hospital.
authors.forename: Emi
authors.initials: E
authors.lastname: Kinoshita
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Umezu
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Ogawa
authors.forename: Toyoyuki
authors.initials: T
authors.lastname: Katou
authors.forename: Hisao
authors.initials: H
authors.lastname: Arimura
authors.forename: Hideki
authors.initials: H
authors.lastname: Yoshikawa
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Higashida
authors.forename: Masafumi
authors.initials: M
authors.lastname: Ooki
authors.forename: Fukai
authors.initials: F
authors.lastname: Toyofuku
mesh_terms: D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D013902:Radiography, Thoracic / Q000295:instrumentation* / Q000379:methods*