Fig. 3From: Impact of iodine concentration and scan parameters on image quality, contrast enhancement and radiation dose in thoracic CTMean contrast-to-noise values measured for the specific HU between 0 and 600 HU at tube potentials between 70–140 kVp when using dose modulation (a, b and c) and a constant volume computed tomography dose index (CTDIvol) (d, e and f) for the three different phantom sizes. The horizontal line displays the diagnostic contrast enhancement level ≥ 200 HUBack to article page