Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Dense mitral annular calcifications are re- demonstrated . Cardiac silhouette size is mildly enlarged , unchanged . Mediastinal and hilar contours are similar . There is mild pulmonary vascular congestion without overt pulmonary edema . Lung volumes are low . As seen previously , there is residual patchy opacity in the right mid lung field with adjacent focal right lateral pleural thickening , likely the residua of prior pneumonia . There is a moderate size right pleural effusion , not substantially changed in the interval , with adjacent atelectasis . Left lung remains clear . There is likely a trace left pleural effusion . No pneumothorax is seen . No acute osseous abnormality is visualized .
    OUTPUT:
    
No substantial interval change from the prior study . Continued residual patchy opacity in the right mid lung field with adjacent focal pleural thickening , likely the residua of previous pneumonia . Moderate size right pleural effusion is similar with perhaps a possible trace left pleural effusion .