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312 18 Pleura

(b)

(a)

Figure 18.9 Lateral (a) and ventrodorsal (b) images of a cat with a severe pneumothorax. The pleural space is widened and
radiolucent. The right and left cranial lung lobes and right middle lobe are completely collapsed, and visualized as soft tissue nodular
structures (small arrows). The caudal lobes are more inflated, but are still partially collapsed and surrounded by radiolucent pleural air
(large arrow). A gap is present between the heart and sternum on the lateral image. Tenting of the diaphragm (caused by pulling of the
diaphragm against its costal attachment) is noted on the ventrodorsal view (white arrow).

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