Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright PA and lateral radiographs of the chest . Since the next most recent study of ___ , there is streaky atelectasis at the right base and new blunting of the right costophrenic sulcus which may represent atelectasis or consolidation . Also , there is left retrocardiac opacity on the AP view with increased density projecting over the spine at the lung base on the lateral view . The cardiomediastinal silhouette and hilar contours are normal without cardiomegaly . There is no pneumothorax .
    OUTPUT:
    
Atalectasis at the right base and left retrocardiac opacity raises concern for pneumonia . Results called to Dr . ___ by ___ at 3 : 40 pm , ___ .