Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal , hilar , and cardiac contours . Faint asymmetric increased opacification of the right lower and mid lobes compared to the left may be positional , though early infectious process can not be excluded . No pneumothorax . No pleural effusion .
    OUTPUT:
    
Faint increased opacification of right mid and lower lungs may be artifactual though can not exclude early infectious process in the appropriate clinical setting .