Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . Right lung is clear . There is subtle opacity in the left mid and lower lung , corresponding to overlapping osseous structures . Please note , the opacity ___ in part likely reflecting overlapping osseous structures appears new from the prior exam and the possibility of subtle pneumonia can not be excluded . Recommend oblique views to clarify . No large effusions or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm . Degenerative osteophytes along the anterior mid T - spine noted .
    OUTPUT:
    
Subtle opacity in the left mid - to - lower lung may represent overlapping osseous structures , although possibility of pneumonia impossible to exclude . Recommend oblique views to clarify .