Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate persistent retrocardiac opacification consistent with pneumonia , which is best seen on the lateral view . Cardiomediastinal and hilar contours are unremarkable . No pneumothorax or pleural effusion . Left - sided PICC line ends in the distal SVC .
    OUTPUT:
    
Persistent retrocardiac opacity consistent with pneumonia , best seen on the lateral view .