Figure 3.

Example of false positive pulmonary nodule identification on ultra-low-dose computed tomography chest. A: Selected axial slice of a standard dose computed tomography (CT) chest presented in lung windows with a small focus of peripheral atelectasis in the posterior segment of the right upper lobe (arrow); B: Selected axial slice of an ultra-low dose CT chest with model-based iterative reconstruction presented in lung windows at the same level in the same patient with the focus of soft tissue attenuation in the posterior segment of the right upper lobe incorrectly identified as a solid pulmonary nodule (arrow). The incidence of false positive solid nodule identification was minimal and did not reach statistical significance.