Fig. 1.

Standard dose contrast enhanced-chest CT in 48-year-old woman (BMI: 23 kg/m²) with lung cancer in left upper lobe.

A-C. Transverse CT images with (A) full radiation dose FBP in B70f kernel and 5 mm slice thickness, (B) full radiation dose IRIS in I70f kernel and 5 mm slice thickness, and (C) half radiation dose IRIS in I70f kernel and 5 mm slice thickness. Objective noise measured in saline bag was 66.1 HU, 37.5 HU and 53.8 HU, respectively (not shown). BMI = body mass index, HU = Hounsfield unit, FBP = filtered back projection, IRIS = iterative reconstruction in image space