Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates stable right lower lobe opacity consistent with small pleural effusion or pleural thickening and adjacent atelectasis . The left lung is clear . The cardiomediastinal and hilar contours are unchanged . A chest tube projects over the right hemi thorax . There is no pneumothorax .
    OUTPUT:
    
Stable small right pleural effusion or pleural thickening with adjacent atelectasis .