Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower compared to the previous exam . This accentuates the size of the cardiac silhouette which is mildly enlarged . Mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures . Patchy opacities within the lung bases may reflect areas of atelectasis though infection can not be excluded . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases may reflect areas of atelectasis in the setting of low lung volumes , but infection is not completely excluded . Consider repeat PA and lateral views when the patient is able to take a deeper inspiration to better assess the lung bases .