Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Midline sternotomy wires as well as a prosthetic mitral valve noted . There is extensive scarring within the right lung with similar overall pattern compared with the prior imaging studies and a small loculated right pleural effusion is again seen . Otherwise , the lungs remain clear without evidence of pneumonia or CHF . No left effusion . No pneumothorax . Overall , cardiomediastinal silhouette appears stable . Bony structures are intact .
    OUTPUT:
    
Stable appearance of the chest with extensive scarring in the right lung due to radiation fibrosis better assessed on prior CT with small right pleural effusion , loculated appearing stable .