Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged with a left ventricular configuration . The aortic arch is calcified . Allowing for differences in technique , the mediastinal and hilar contours appear unchanged . There is probably slight congestion with a mild interstitial abnormality including peribronchial cuffing although this is probably a background finding for which differential considerations include slight chronic pulmonary congestion or airway inflammation . Otherwise , the lungs appear clear aside from patchy posterior basilar opacity partly obscuring the left hemidiaphragm , suggesting minor atelectasis . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Stable appearance of the chest .