Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is no free air below the right hemidiaphragm . Contrast is noted in the upper abdominal large bowel loops . A subtle nodular density is new at the left lung base seen only on the frontal projection may represent a nipple shadow or possibly early focus of pneumonia . Please note this nodular focus was not seen on the CT of the lung bases from earlier today . Aside from this , no abnormalities are seen within the chest . Heart and mediastinal contour is normal . Bony structures are intact .
    OUTPUT:
    
No free air below the right hemidiaphragm . Subtle nodular opacity at the left lung base , new from prior CT from earlier today , question nipple shadow or early focus of pneumonia . Consider repeat with optimized inspiration and nipple markers .