Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding similar study ___ ___ . The heart size is normal . No configurational abnormalities identified . Thoracic aorta and mediastinal structures are unremarkable . The pulmonary vasculature is normal . No signs of acute or chronic parenchymal infiltrates are present and the lateral and posterior pleural sinuses are free . No pneumothorax in apical area . Skeletal structures of the thorax grossly within normal limits . In comparison with the next previous study of ___ , no significant interval change can be identified .
    OUTPUT:
    
Stable normal chest findings , no evidence of cardiovascular or pulmonary abnormalities .