Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged . The aorta is tortuous mediastinal and hilar contours are otherwise unremarkable . Low lung volumes results in crowding of bronchovascular markings . No overt pulmonary edema is present . Eventration of the right hemidiaphragm is seen . There is no focal consolidation , pleural effusion , or pneumothorax . Streaky opacities in the lung bases likely reflect atelectasis . No acute osseous abnormalities detected .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary abnormality .