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