Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right ventricular pacemaker lead is in a rather high position in the right ventricle . The right atrial lead appears to be in appropriate position . No evidence of pneumonia or pneumothorax . The elevated left hemidiaphragm , pleural thickening , and blunting of the left costophrenic angle is chronic and unchanged . The cardiac , mediastinal , and hilar contours are normal . Right lung is clear .
    OUTPUT:
    
No evidence of pneumonia . No radiographic findings to explain patient 's symptoms .