胸部専用スクリーン/フィルムシステムの視覚的評価 : 腫瘤性病変の検出

概要

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It is thought that noise property and the shape of H-D curve of AD system (HGM/URI) are more suited for chest radiographs compared with conventional system (HR4/super HRS). Therefore, we studied the visual detectability of low contrast simulated nodules using chest radiographs taken by AD and HR4/super HRS systems. Film base was used as a simulated nodule. Fifty-six radiographs, with and without a nodule each, were employed for ovserber performance test. Reciever operating characteristic analysis (the method for continuously-distributed test results) was used for observer performance data. As a result, the total detectability of AD system was slightly superior to that of HR4/super HRS system. In the mediastinum area, however, AD system was greatly superior compared to HR4/super HRS system, and in the lung field both were almost equal.
1995-12-01