6­-year-­old male neutered large mixed breed dog that presented with a history of acute lethargy and labored breathing. Thoracocentesis revealed hemothorax. Image protocol: The patient was imaged in dorsal recumbency. A survey and post­-i.v. contrast CT was performed of the chest. The contrast dose was 1 ml/lb BW of Iohexol (300mg/ml iodine) contrast media; given as a bolus prior to image initiation.