Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours appear unchanged . The heart is again mildly enlarged . The aortic arch is calcified . Postoperative changes with volume loss , relative elevation of the left hemidiaphragm , and thickening of the pleural surfaces , potentially with pleural effusion , appear unchanged in the left hemithorax . Surgical clips also project along the left mid chest . Wedging of a lower thoracic vertebral body anteriorly appears unchanged . Moderate degenerative changes are similar throughout the thoracic spine more generally , and bony demineralization is suspected . There is also mild rightward convex curvature of the thoracic spine , as before .
    OUTPUT:
    
Stable appearance of the chest .