Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . The aortic knob is calcified . The mediastinal and hilar contours are relatively unchanged , though there is mild pulmonary vascular congestion , which is worse compared to the prior study . No large effusion or pneumothorax is seen . There is minimal patchy opacity in the retrocardiac region likely reflecting atelectasis . No acute osseous abnormalities are seen .
    OUTPUT:
    
Mild pulmonary vascular congestion , slightly worse than prior .