Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest demonstrates slightly low lung volumes , with linear bands of atelectasis in the left lung base and at least a small left effusion . Otherwise , the cardiomediastinal silhouette is unremarkable . There is no large right pleural effusion , pneumothorax , or overt pulmonary edema .
    OUTPUT:
    
Low lung volumes and left basilar atelectasis and effusion .