Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal portable chest radiograph demonstrates persistent elevation of the right hemidiaphragm . Right lower lung opacification relatively stable and likely represents atelectasis . No focal opacification concerning for pneumonia identified . Cardiomediastinal and hilar contours are unremarkable . No pleural effusions or pneumothorax evident . Right - sided Port - A - Cath terminates at the cavoatrial junction and is currently accessed .
    OUTPUT:
    
No acute intrathoracic process .