Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded . Opacity in the right lower lobe obscures the right heart border . Right chest wall defibrillator with intact atrial and ventricular leads is unchanged from ___ . Postoperative mediastinum and cardiomegaly are stable from ___ . There is no pneumothorax or right pleural effusion . The left hemidiaphragm is incompletely visualized .
    OUTPUT:
    
Possible right middle lobe pneumonia . A lateral view would be helpful .