Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lower lobe airspace opacity is not appreciably changed since ___ . The patient has had prior median sternotomy with valve replacement . There is no pleural effusion . Moderate cardiomegaly is stable . There is no pneumothorax . Generalized osteopenia and multilevel spinal degenerative changes are also stable .
    OUTPUT:
    
Stable right lower lobe pneumonia . Stable moderate cardiomegaly .