Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate low lung volumes . There is an airspace opacity involving the right lung base , which is also seen projecting over spine on the lateral view . No pleural effusion or pneumothorax is seen . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Right lower lobe pneumonia .