Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . There is subtle opacity in the expected region of the inferior lingula , which could represent an early or resolving pneumonia . The remainder of the lungs appears clear . No pleural effusion or pneumothorax . Heart size appears normal . The aorta is slightly unfolded . Bony structures are intact .
    OUTPUT:
    
Subtle opacity in the inferior lingula could represent an early or resolving pneumonia .