Fig. 3.

2.5 mm thick transverse chest CT performed by weight-adapted automatic exposure control technique in lung (A) and mediastinal (B) windows in 76-year-old female (weight 43 kg, objective noise 8.1, and CTDIvol 12.8 mGy). Chest CT examination with non-weight-adjusted automatic exposure control technique in 43-year-old female (weight 45 kg, objective noise 8.9, CTDIvol 18.0 mGy) in lung (C) and mediastinal (D) windows. At lower radiation dose, weight-adjusted automatic exposure control protocol provides acceptable image noise and diagnostic acceptability.