Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior examination from ___ , there is an unchanged heterogeneous opacity in the right lower lung , which likely represents a conglomeration of vessels and atelectasis . There is no focal consolidation concerning for pneumonia . Heart size is mildly enlarged but stable . Hilar mediastinal contours are unchanged . No pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . Unchanged right infrahilar opacity is likely a conglomeration of vessels and atelectasis .