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 remains unchanged and is within normal limits . No typical configurational abnormalities identified . Thoracic aorta moderately widened and elongated as before with extensive calcium deposits in the wall at the level of the arch . The pulmonary vasculature is not congested . No signs of acute or chronic pulmonary parenchymal abnormalities are seen , and the lateral and posterior pleural sinuses are free .
    OUTPUT:
    
Stable chest findings , no cardiac enlargement or pulmonary congestion . No evidence of acute pulmonary infiltrates . Stable appearance of somewhat low - positioned and flattened diaphragms , which could suggest the possibility of COPD , but again acute processes can not be identified .