Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The posterior costophrenic angles are sharp bilaterally . On the PA view , the right costophrenic sulcus is less well defined than on the most recent study but relatively similar to an older radiograph . Minimal peripheral parenchymal scarring is seen in this region of the lung , suggesting this may reflect focal parenchymal and pleural scarring . Lungs and pleural surfaces are otherwise clear . Heart size , mediastinal and hilar contours are within normal limits and without change . No acute skeletal findings .
    OUTPUT:
    
No evidence of a pleural effusion . Focal right basilar scarring .