Fig. 4
From: 75% radiation dose reduction using deep learning reconstruction on low-dose chest CT
A man received low-dose chest CT for the follow-up evaluation of a spiculated lung nodule. (A-C) Conventional low-dose chest CT images were reconstructed with iterative reconstruction, and (D-F) the images generated using a quarter dose of radiation were reconstructed with commercial deep-learning software. (A, D) Soft-tissue structures including calcified mediastinal lymph nodes were visualized with a lower noise level in the mediastinal-window setting on both images. (C, F) A spiculated nodule in the left upper lobe was well visualized with a sharp margin on both images (arrow)