Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient upright position . Comparison is made with the next preceding similar study ___ ___ . Moderate cardiac enlargement as before . No typical configurational abnormality . Unchanged appearance of thoracic aorta which is of normal ___ but shows some calcium deposits in the wall . The pulmonary vasculature is not congested . No signs of new acute parenchymal infiltrates are present . The lateral and posterior pleural sinuses are free . As on previous examination , there is an increased interstitial pattern on the lung bases but all these findings appear to be stable .
    OUTPUT:
    
Moderate cardiomegaly but no evidence of CHF , increased interstitial pattern on the bases probably related to patient 's COPD . Comparison with next previous examination four months ago does not disclose evidence of new acute infiltrates .