Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrate minimal emphysematous changes . There is no focal opacity convincing for pneumonia . Heart size is normal . There is no evidence of pulmonary edema . Oblong opacity projecting over the left hemi thorax is without a correlate on the lateral view , present on examination dated ___ , probably benign possibly representing pleural calcification . There is no pleural effusion or pneumothorax . No displaced rib fracture is identified .
    OUTPUT:
    
No displaced rib fractures identified . If clinical concern persists for a rib fracture , recommend dedicated rib films with radiopaque markers .