Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . The heart size is unchanged and remains within normal limits . Unremarkable appearance of thoracic aorta . Pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present and the lateral and posterior pleural sinuses remain free . No pneumothorax in apical area . Skeletal structures of the thorax grossly within normal limits .
    OUTPUT:
    
Normal chest findings , no significant interval change since the next preceding study of ___ .