Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Moderate cardiomegaly is stable . A left subclavian central venous line ends in the upper right atrium . There is no definite focal pulmonary vascular congestion and possible mild interstitial edema . Retrocardiac opacity may represent atelectasis or pneumonia . No pneumothorax .
    OUTPUT:
    
Moderate cardiomegaly and pulmonary vascular congestion , likely mild interstitial pulmonary edema . Retrocardiac opacity may represent atelectasis , aspiration or pneumonia .