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. 2012 Mar 7;13(2):210–226. doi: 10.3348/kjr.2012.13.2.210

Fig. 24.

Fig. 24

Use of intravenous contrast to differentiate mass lesion from collapsed lung.

A. Contrast-enhanced CT scan of 71-year-old woman showed collapsed left upper lobe and less enhancing lesion (arrow) in posterior part of collapsed lung. B. Needle was advanced through collapsed lung into lesion. Without contrast, it was difficult to differentiate mass from adjacent collapsed lung.