Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate persistent left lower lobe opacity , unchanged from multiple priors . The lungs are otherwise clear . No pulmonary edema is seen . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Persistent left lower lobe opacity , chronic from multiple priors , possibly representing scarring with atelectasis , though non-urgent CT - Chest recommended for definitive evaluation .