Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinal and hilar contours are unremarkable . Mildly enlarged cardiac silhouette may reflect technique as configuration appears largely unchanged compared to prior studies . Minimal linear bibasilar opacifications likely due to atelectasis or scarring . Bronchovascular crowding noted in the lung bases . No focal opacification concerning for pneumonia . No overt pulmonary edema . No pleural effusion or pneumothorax is present . No displaced rib fracture identified .
    OUTPUT:
    
Bronchovascular crowding and atelectasis . No acute cardiopulmonary process .