Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable . Patchy opacities within the lung bases likely reflects atelectasis in the setting of low lung volumes . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with patchy bibasilar opacities , likely atelectasis . Infection is not excluded in the correct clinical setting .