Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unremarkable . Lung volumes are low with crowding of bronchovascular structures . No overt pulmonary edema is present . Patchy right infrahilar opacity likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with patchy right basilar opacity , likely atelectasis .