Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly with unfolding of the thoracic aortic arch is unchanged . Mediastinal contours are unremarkable . Central pulmonary vascular congestion with perihilar interstitial opacities primarily at the lung bases is appears similar to the prior exam compatible with mild pulmonary edema . No pleural effusion or pneumothorax .
    OUTPUT:
    
Essentially unchanged examination compared to ___ with re - demonstration of moderate cardiomegaly , vascular congestion and mild interstitial pulmonary edema .