Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At the base of the right hemithorax have been present since ___ . It may be necessary to obtain lateral radiographs or even Chest CT 2 distinguish between these possibilities . Heart is normal size . Thoracic aorta is generally large and somewhat calcified but not clearly focally aneurysmal . Left PIC line ends at the origin of the SVC . Heart is not enlarged . There is no pneumothorax . Large and small bowel in the upper abdomen are distended but not fully evaluated by this study . There is no evidence of pneumoperitoneum . ______________________________________________________________________________ FINAL REPORT
    OUTPUT:
    
New U density opacification at the base of the left lung could be explained by moderate left pleural effusion and / or left lower lobe atelectasis . Similar abnormalities at the base of the right hemithorax have been present since ___ . It may be necessary to obtain lateral radiographs or even Chest CT in order to distinguish between these possibilities . Heart is normal size . Thoracic aorta is generally large and heavily calcified but not clearly focally aneurysmal . There is no pneumothorax . Large and small bowel in the upper abdomen are distended but not fully evaluated by this study . There is no evidence of pneumoperitoneum . Left PIC line ends at the origin of the SVC .