Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . There is prominence of interstitial markings and a possible retrocardiac opacification . The heart is mildly enlarged and there is no pleural effusion or pneumothorax . The bones and soft tissues are unremarkable .
    OUTPUT:
    
Possible retrocardiac opacity could be prominent vessels but consolidation is not excluded and could represent pneumonia in the appropriate clincal setting . Mild enlargement of the cardiac silhouette and prominence of the interstitial markings reflects normal physiological changes in this pregnant patient .