Computed Tomography
Computed tomography (CT) is very sensitive for identification of pulmonary contusion, and may allow differentiation from areas of atelectasis or aspiration. CT also allows for 3-dimensional assessment and calculation of the size of contusions. However, most contusions that are visible only on a CT scan are not clinically relevant, in that they are not large enough to impair gas exchange and do not worsen outcome. Nevertheless, CT will accurately reflect the extent of lung injury when pulmonary contusion is present.