Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged , unchanged from prior study . Retrocardiac opacity in the left lung base could reflect atelectasis alone , however infection is not excluded in the appropriate clinical setting . Right basilar atelectasis again seen . Mediastinal and hilar contours are unchanged , with persistent prominence of the right hilum . There is interval progression of vascular congestion and pulmonary edema can currently be seen
    OUTPUT:
    
Left basilar opacity , possibly atelectasis , however infection is not excluded . Clinical correlation is recommended . Stable mild cardiomegaly and right basilar atelectasis .