Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views are obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Heart size remains normal . Unchanged appearance of thoracic aorta . No mediastinal abnormalities . The pulmonary vasculature is not congested . No signs of active new pulmonary parenchymal infiltrates and no signs of pleural effusion . Previously described minimal peripheral pleural scar formation and bilateral apical pleural thickenings and linear densities are completely unchanged .
    OUTPUT:
    
Stable chest findings . No evidence of new acute infiltrates . Unchanged minimal scar formations .