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Comparison of a digital flat-panel versus screen–film, photofluorography and storage-phosphor systems by detection of simulated lung adenocarcinoma lesions using hard copy images

¹ Oita Prefectural Hospital, 476 Bunyo Oita City 870-8511, ² Shin Beppu Hospital, 3898 Turumi Beppu City 874-0833, ³ National Institute of Radiological Sciences, 4-9-1 Anakawa, Inageku, Chiba City 263-8555 and ⁴ Oita University of Nursing and Health Sciences, 2944-9 Megusuno, Oita 870-1201, Japan

View larger version (49K): [in a new window]   Figure 1. A cross-sectional drawing of the spherical simulation of small adenocarcinoma. The core corresponds to foci of structural collapse of alveoli and active fibroblastic foci.

View larger version (51K): [in a new window]   Figure 2. Simulated small adenocarcinomas.

View larger version (52K): [in a new window]   Figure 3. A schematic diagram showing the location of the spherical simulation of a small adenocarcinoma on radiography.

View larger version (6K): [in a new window]   Figure 4. Relation between dose and the detection rate of simulated lesions of lung adenocarcinomas for Type B, phantom No. 1 (•: analogue system, : digital system). Each error bar shows the standard deviation of the detection rate of simulated lesions among observers (four radiologists and two general thoracic surgeons).