Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the lateral view , at the right lung base posteriorly , there is a vague opacity that may represent pneumonia . This is not entirely well seen on the frontal view . There is no pleural effusion or pneumothorax . The cardiomediastinal and hilar contours are normal .
    OUTPUT:
    
Vague opacity posteriorly in the right lower lobe may represent pneumonia . Steep oblique views can be done for more definitive assessment .