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. 2014 Jul 18;46(4):393–402. doi: 10.4143/crt.2013.132

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Copyright © 2014 by the Korean Cancer Association

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Representative cases for infectious pneumonia. (A) Transverse ultra-low-dose computed tomography (ULDCT) scan in a patient with Aspergillus infection shows a nodule surrounded by a halo of ground-glass opacity in the left lower lobe (arrow). All three observers reached a consensus as an excellent image quality level. (B) Transverse ULDCT scans in a patient with Pneumocystis pneumonia show bilateral patchy areas of ground-glass opacity (arrows). All three observers reached a consensus as an acceptable image quality level. (C) Transverse and coronal ULDCT scans in a patient with streptococcal pneumonia show consolidation involving the posterior basal segment of the right lower lobe (arrows). All three observers reached a consensus as an acceptable image quality level. (D) Transverse ULDCT scans in a patient with coronavirus infection show multiple centrilobular nodules (arrowheads) and bilateral areas of lobular consolidation of peribronchial distributions (arrows). All three observers reached a consensus as an unacceptable image quality level.