Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes cause bronchovascular crowding and bibasilar atelectasis , particularly in the medial right lung base , similar to prior studies . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Low lung volumes causing bibasilar atelectasis , no evidence of acute cardiopulmonary process .