Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size appears mildly enlarged but similar . Mediastinal and hilar contours are unremarkable . Lung volumes are low which result in crowding of bronchovascular structures . No overt pulmonary edema is present . Patchy opacities in the lung bases ___ reflect areas of atelectasis . No pleural effusion or pneumothorax is apparent . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with patchy opacities in the lung bases likely reflective of atelectasis .