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 chest examination dated ___ . The heart size is normal . No configurational abnormality is identified . Thoracic aorta and mediastinal structures are unremarkable . A right - sided lobus venae azygos is identified and unchanged in appearance . 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 . When comparison is made with the previous examination , no significant interval change is identified .
    OUTPUT:
    
Persistent normal chest findings , thus no evidence of any acute infiltrates .