CT ANGIOGRAM SIGN IN OBSTRUCTIVE PNEUMONITIS AND PNEUMONIA

Objective: The ''CT angiogram sign'' in dynamic pulmonary CT consists of enhanced branching pulmonary vessels in a homogeneous hypoattenuati ng consolidation of lung parenchyma and is reportedly useful for diagn osing lobar bronchioloalveolar cell carcinomas. Materials and Methods: To identify cases exhibiting the CT angiogram sign, we retrospectivel y reviewed the reports of 5,500 dynamic incremental CT examinations of the chest. Results: We identified the CT angiogram sign in five patie nts with obstructive pneumonitis due to lung tumors and four patients with pneumonias. Conclusion: The CT angiogram sign can be observed in pulmonary consolidation of varying etiologies.