Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stimulator devices in bilateral chest with the leads coursing cranially are present , unchanged in position since prior studies . Apart from the lungs obscured by the stimulator devices , appear clear . No opacities concerning for pneumonia . There is no pleural effusion . Old healed rib fractures are seen on the right side . Heart size , mediastinal and hilar contours are normal .
    OUTPUT:
    
No acute intrathoracic process . No pneumonia .