Fig. 16From: Multidetector computed tomography of chest trauma: indications, technique and interpretationComparison between contusion and atelectasis. Contusion (arrow) is an inhomogenous, ill-demarcated, relatively hypodense parenchymal condensation with preservation of air in the bronchi (air bronchogram). Atelectasis (arrowhead) appears like homogenously enhancing well-demarcated parenchymal condensation without an air bronchogramBack to article page