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 of ___ . Heart size and mediastinal structures are unremarkable . Normal appearance of thoracic aorta . 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 . No pneumothorax in the apical area . In comparison with the next previous study at that time questioned pulmonary parenchymal density overlying the left side sixth rib can not be identified anymore .
    OUTPUT:
    
Chest findings within normal limits . No suspicious nodular lesion .