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Comparison of apparent trabecular structure measures (BV/TV (a), Tb.N (b), Tb.Sp (c), Tb.Th (d)) derived using protocol A (120 kVp and 200 mA) vs. protocol B (135 kVp and 400 mA) as assessed with the 64-slice (black dots) and the 320-slice (red dots) MDCT device. Coefficient of determination R 2 is given
