Müller R D, John V, Voss M, Buddenbrock B, Blendl C, Hirche H, Ewen K, Löhr E
Röntgendiagnostisches Zentralinstitut des Universitätsklinikums-GHS-Essen.
Rofo. 1993 Jul;159(1):54-9. doi: 10.1055/s-2008-1032721.
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.
使用200厘米的焦-片距和125千伏电压，对一个仿真人体胸部模型进行后前位投照，使用200类（Curix RP 1L/MR 200）和400类（Curix ST-L/Regular）的增感屏-胶片组合。通过合适的材料模拟细结节状、线状和网状肺实质的病理形态结构。包括t检验的ROC分析表明，在评估这些结构细节方面没有显著差异（p>0.05）。为了描述这两种增感屏-胶片系统的图像质量，测定了密度曲线、西格玛D曲线和调制传递函数（MTF）。唯一可证明的差异是，与200系统的4.3线对/毫米相比，更高增感的增感屏-胶片组合的MTF降低了10-15%，导致分辨率较差，为3.7线对/毫米（对于400系统）。
