Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size appears mildly enlarged . The mediastinal and hilar contours are unremarkable . There is mild pulmonary vascular congestion , with patchy bibasilar atelectasis , more pronounced on the right . No pleural effusion or pneumothorax is present . No acute osseous abnormalities identified . Degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Mild pulmonary edema and bibasilar atelectasis .