Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate size left pleural effusion has increased since the previous radiograph . Left basilar opacity likely reflects compressive atelectasis . Heart size is difficult to ascertain given the presence of the left pleural effusion . The mediastinal contours are similar with diffuse atherosclerotic calcification of the aorta again noted . Pulmonary vasculature is normal . No pneumothorax is detected . A trace right pleural effusion is similar compared to the prior study . There is minimal atelectasis in the right lung base . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Increased size of moderate left pleural effusion with left basilar compressive atelectasis . Unchanged small right pleural effusion and minimal right basilar atelectasis .