Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A mild baseline interstitial abnormality is much improved from previous radiographs ; the lungs are clear of any acute abnormality . The cardiac , hilar and mediastinal contours are stable , with mild hilar prominence likely mild central adenopathy since at least ___ . No pleural abnormality is seen .
    OUTPUT:
    
No acute cardiopulmonary process .