Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrates a right middle lobe opacity obscuring the right heart border on the frontal view . This corresponds to an opacity overlying the heart on the lateral view . The lungs are otherwise clear and the hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion and the pulmonary vascularity is normal .
    OUTPUT:
    
Right middle lobe pneumonia .