Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable moderate - to - severe cardiac enlargement . The lung volumes are low . The right hemidiaphragm is elevated and unchanged . Retrocardiac atelectasis is stable . There are no new consolidations . There are no definite pleural effusions . There is no pneumothorax .
    OUTPUT:
    
1 . Stable retrocardiac atelectasis . 2 . Moderate - to - severe cardiomegaly . 3 . Elevated right hemidiaphragm .