Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there is a opacity in the right lower lung , which is not substantially changed from previous radiographs , however may represent pneumonia in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are normal .
    OUTPUT:
    
Right lower lung opacity is not substantially changed from priors , however may represent pneumonia in the appropriate clinical setting . If further confirmation of pneumonia is desired , obtain oblique radiographs for further evaluation .