Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which appears borderline enlarged . Mediastinal and hilar contours are unremarkable . There is crowding of bronchovascular structures without overt pulmonary edema . Minimal streaky opacities in the lung bases likely reflect areas of atelectasis . No pneumothorax or pleural effusion is visualized . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases likely reflect atelectasis .