Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is normal . The hila and pleura are unremarkable . On lateral view there is increased opacification in the retrocardiac region not appreciated on frontal view which could likely represent crowding secondary to low lung volumes on the right clinical setting pneumonia can not be excluded . There are no pleural effusions or pulmonary edema . . There is mild right basilar atelectasis .
    OUTPUT:
    
Retrocardiac opacification on lateral view that may represent vascular crowding versus pneumonia .