Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There is no focal consolidation , effusion , or pneumothorax . A stable linear density projecting posteriorly on the lateral view is unchanged from multiple prior exams and likely represents a focus of scarring . Cardiomediastinal silhouette appears normal . No pneumothorax or pleural effusion . Bony structures are intact .
    OUTPUT:
    
No acute intrathoracic process .