Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes exaggerate the size of the cardiac silhouette which appears mild to moderately enlarged . A moderate size hiatal hernia is again demonstrated . Mediastinal and hilar contours are similar , with crowding of bronchovascular structures . No overt pulmonary edema is demonstrated . Streaky opacities in the lung bases likely reflect areas of atelectasis , with no focal consolidation identified . No pleural effusion or pneumothorax is present . Compression deformities of several vertebral bodies at the thoracolumbar junction remain unchanged .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis . Moderate size hiatal hernia .