Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single semi upright portable chest radiograph demonstrates a left chest pacer device , its leads which appear intact and in unchanged position relative to prior examination . Relative to prior examination performed ___ , the appearance of the chest is not significantly changed with dilatation of the esophagus . Loops of bowel are identified projecting over the left upper quadrant with elevation of the left hemidiaphragm . Borders of the heart are largely obscured . Opacification of the right hemithorax is stable . While there is obscuration of the left costophrenic angle , the right costophrenic angle is clear . No evidence of a large pleural effusion . Degree of pulmonary vascular congestion appears improved relative to prior study . Osseous structures are without an acute abnormality .
    OUTPUT:
    
Opacification of the right hemithorax is similar in appearance to prior examination possibly secondary to progressed lymphadenopathy although pulmonary mass or consolidation can not be excluded . Degree of pulmonary vascular congestion is improved .