Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion or pneumothorax . Linear atelectasis is again noted in the lingula was present ___ ___ . However , increased subpleural atelectasis at the left lung base posteriorly , noted on the concurrent CT , is new from ___ and may be related to an interval infection which has resolved . Heart size is upper limits of normal . Mediastinal silhouette and hilar contours are normal . Enlargement of the aortic root is better seen on the prior CT .
    OUTPUT:
    
No pneumonia , edema or pleural effusion .