Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube is in stable position . Right - sided central venous catheter is noted with distal tip in the right atrium . Relatively low lung volumes are again noted . There is right basilar opacity , most likely atelectasis . Elsewhere , the lungs are clear without consolidation or edema . There is no large effusion . Left shoulder arthroplasty changes are noted .
    OUTPUT:
    
No acute cardiopulmonary process .