title: [Are high-intensifying film-screen combinations suitable for the detection of fine interstitial lung changes? The results of a ROC study with an anthropomorphic thorax phantom].
abstract: Exposures of an anthropomorphic thorax phantom in posteroanterior projection were made using a focus-film distance of 200 cm and 125 kV with film-screen combinations in class 200 (Curix RP 1L/MR 200) and class 400 (Curix ST-L/Regular). Pathomorphological structures of the lung parenchyma of fine nodular, linear and reticular types were simulated by suitable materials. A ROC analysis including a t-test showed no significant difference in the evaluation of these structural details (p > 0.05). In order to describe image quality for the two film-screen systems, density curves, sigma D-curves and modulation transfer function (MTF) were determined. The only demonstrable difference was reduced MTF of 10-15% for the higher intensification film-screen combination with a resulting poorer resolution of 3.7 l/mm (for the 400 system) compared with 4.3 l/mm for the 200 system.
authors.affiliation: Röntgendiagnostisches Zentralinstitut des Universitätsklinikums-GHS-Essen.
authors.forename: R D
authors.initials: RD
authors.lastname: Müller
authors.forename: V
authors.initials: V
authors.lastname: John
authors.forename: M
authors.initials: M
authors.lastname: Voss
authors.forename: B
authors.initials: B
authors.lastname: Buddenbrock
authors.forename: C
authors.initials: C
authors.lastname: Blendl
authors.forename: H
authors.initials: H
authors.lastname: Hirche
authors.forename: K
authors.initials: K
authors.lastname: Ewen
authors.forename: E
authors.initials: E
authors.lastname: Löhr
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008961:Models, Structural; D012372:ROC Curve; D011859:Radiography; D012680:Sensitivity and Specificity; D014963:X-Ray Intensifying Screens / Q000706:statistics & numerical data
vernacular_title: Sind hochverstärkende Film-Folien-Kombinationen zur Detektion feiner interstitieller Lungenveränderungen geeignet? Ergebnisse einer ROC-Studie am anthropomorphen Thoraxphantom.