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Metastases of Colorectal Carcinoma: Comparison of Soft- and Hard-Copy Helical CT Interpretation¹

¹ From the Departments of Radiology (M.E.J.P., M.N.J.M.W., E.C.J., J.L.B.) and Surgery (C.J.H.v.d.V.), Leiden University Medical Center, Albinusdreef 2, C3-Q, 2333 ZA Leiden, the Netherlands. Received February 1, 2002; revision requested March 18; final revision received September 17; accepted September 30. Address correspondence to M.E.J.P. (e-mail: m.e.j.pijl@lumc.nl).

View larger version (35K): [in a new window]   Figure 1. ROC curves for nonenhanced CT. FPF = false-positive fraction, TPF = true-positive fraction. Thin solid line = observer 1 interpretation of hard copies, thin dotted line = observer 2 interpretation of hard copies, thick solid line = observer 1 interpretation of soft-copy readouts, thick dotted line = observer 2 interpretation of soft-copy readouts.

View larger version (29K): [in a new window]   Figure 2. ROC curves for contrast-enhanced CT. FPF = false-positive fraction, TPF = true-positive fraction. Thin solid line = observer 1 interpretation of hard copies, thin dotted line = observer 2 interpretation of hard copies, thick solid line = observer 1 interpretation of soft-copy readouts, thick dotted line = observer 2 interpretation of soft-copy readouts.