[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].
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.
Müller
R D
RD
Röntgendiagnostisches Zentralinstitut des Universitätsklinikums-GHS-Essen.
John
V
V
Voss
M
M
Buddenbrock
B
B
Blendl
C
C
Hirche
H
H
Ewen
K
K
Löhr
E
E
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
Sind hochverstärkende Film-Folien-Kombinationen zur Detektion feiner interstitieller Lungenveränderungen geeignet? Ergebnisse einer ROC-Studie am anthropomorphen Thoraxphantom.