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Fig. 2. —Bar graph shows diagnostic efficacy of multidetector high-resolution CT (HRCT). In one case (5%) with helical 1.25-mm high-speed mode and four cases (18%) with helical 2.5-mm high-speed mode, diagnostic efficacy of multidetector HRCT was slightly worse than that on single-detector HRCT. Total number of readings was 22. Area of striped lines, level 1 = sufficient for diagnosis; gray area, level 2 = insufficient for diagnosis.