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 ___ ___ . Mild cardiac enlargement as before with no interval change . The same holds for the moderately widened and elongated thoracic aorta which is without evidence of local contour abnormalities . 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 grossly unchanged .
    OUTPUT:
    
Stable chest findings . No evidence of acute pulmonary infiltrates and no signs of significant chronic pulmonary congestion .