Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A horizontally oriented linear opacity is again seen in the right lower lung , which likely represents the scar given its stability over time . There is left basilar atelectasis . The lungs are otherwise clear . Moderate cardiomegaly and elevated right hemidiaphragm are unchanged . The hilar and mediastinal contours are normal . The pulmonary vascular markings are normal . There is no pneumothorax or pleural effusion . Also noted is stable calcification of the tracheobronchial tree as well as a tortuous aorta .
    OUTPUT:
    
No evidence of pneumonia or CHF exacerbation .