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Fig 2. Reproducibility of the HU values. The HU values obtained in 14 examinations performed on different days were plotted against various tube currents. The tube voltages were (A) 135 kVp, (B) 120 kVp, (C) 100 kVp, and (D) 80 kVp. The section thickness was fixed at 5 mm for all the measurements.
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