Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , lung volumes have improved , as well as left pleural effusion and bibasilar atelectasis . No appreciable effusion on the right . Moderate cardiomegaly is unchanged . There is no central vascular congestion or overt pulmonary edema . No focal consolidation . No pneumothorax . Significant dilatation of the descending thoracic aorta is consistent with known thoracic aortic aneurysm , better assessed on prior CT .
    OUTPUT:
    
1 . Significantly improved left pleural effusion and bibasilar atelectasis . 2 . Stable moderate cardiomegaly . 3 . Stable appearance of dilated descending thoracic aorta , consistent with known thoracic aortic aneurysm , better characterized on prior CT .