Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are within normal limits . Comparison is made with prior study dated ___ . Again identified within the right lung apex is a persistent streaky density most compatible with parenchymal scarring . Bi-apical pleural thickening as well as subtle streaky densities and subsegmental atelectasis is again identified . There is no pleural effusion . There is no pneumothorax . Osseous structures demonstrate no acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .