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. 2022 Sep 9;42(7):1925–1939. doi: 10.1148/rg.220073

Figure 5.

Suboptimal inspiration in an 87-year-old woman who underwent CT for evaluation of a lung nodule. (A, B) Axial CT images show ground-glass abnormalities (arrowheads) in subpleural and central areas of the lung zone. Anterior bulging of the posterior membranous portion of the trachea (arrow in A) and tortuosity of the vessels (circle) suggest suboptimal inspiration. (C, D) Follow-up axial CT images show that the ground-glass abnormality has disappeared, and the normal round shape of the trachea is seen (arrow in C). Tortuosity of the vessels (circle) is no longer seen, and the lung volume, as compared with that in A and B, has improved.

Suboptimal inspiration in an 87-year-old woman who underwent CT for evaluation of a lung nodule. (A, B) Axial CT images show ground-glass abnormalities (arrowheads) in subpleural and central areas of the lung zone. Anterior bulging of the posterior membranous portion of the trachea (arrow in A) and tortuosity of the vessels (circle) suggest suboptimal inspiration. (C, D) Follow-up axial CT images show that the ground-glass abnormality has disappeared, and the normal round shape of the trachea is seen (arrow in C). Tortuosity of the vessels (circle) is no longer seen, and the lung volume, as compared with that in A and B, has improved.