Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate persistent though improved left lower lung opacification , consistent with resolving pneumonia . No new opacifications or pulmonary nodules identified . Cardiomediastinal and hilar contours are unremarkable . Stable position of posterior cervicothoracic spinal fusion and interbody spacer device .
    OUTPUT:
    
Resolving left lower lobe pneumonia .