Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominence of the right mediastinum likely reflects patient rotation and a tortuous thoracic aorta . There is mild enlargement of the cardiac silhouette . The hila are suboptimally assessed given rotation , but grossly within normal limits . There is no pulmonary vascular congestion or pulmonary edema . Right lower lobe opacity may reflect atelectasis , however pneumonia can not be excluded in the appropriate clinical setting . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lobe opacity may reflect atelectasis , however pneumonia can not be excluded in the appropriate clinical setting . Tortuous thoracic aorta . Mild cardiomegaly .