Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . The heart size is within normal limits . No typical configurational abnormality is seen . Unremarkable appearance of thoracic aorta and mediastinal structures are normal . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present , and the lateral and posterior pleural sinuses are free . Skeletal structures of the thorax are grossly unremarkable . There exists no prior chest examination in our records available for comparison .
    OUTPUT:
    
Chest findings within normal limits .