Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is similar compared to the prior study . The aorta remains tortuous . Mediastinal and hilar contours are otherwise unchanged . Previously noted mild pulmonary vascular engorgement has improved without overt pulmonary edema . Streaky atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Moderate degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Interval improvement in mild pulmonary vascular engorgement without overt pulmonary edema . Bibasilar atelectasis .