Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate clear well expanded lungs , with minimal scarring at the left base , unchanged from ___ years prior . There is new atelectasis and small effusion on the right . There is no pleural effusion , or pneumothorax . The cardiac silhouette is top normal , and unchanged from ___ . The mediastinal contours are normal .
    OUTPUT:
    
No acute chest abnormality , with interval appearance of right basal atelectasis and small effusion .