Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . Atelectasis is noted at the right lung base and within the left retrocardiac space . Otherwise , there is no evidence for lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits , allowing for technique and lung volumes .
    OUTPUT:
    
Low lung volumes with bibasilar and left retrocardiac atelectasis .