Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart remains moderately enlarged . Aortic knob is calcified , and there is mild unfolding of the thoracic aorta . Mild pulmonary vascular congestion is noted , with streaky right basilar opacity , possibly reflecting asymmetric pulmonary edema or atelectasis though infection is difficult to exclude . There is no pleural effusion or pneumothorax . No acute osseous abnormalities present .
    OUTPUT:
    
Mild pulmonary vascular congestion . Streaky right basilar opacity could reflect asymmetric pulmonary edema or atelectasis , but infection can not be excluded .