Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged . Calcifications noted of the aortic knob . Mediastinal silhouette and hilar contours unchanged compared with ___ . Upper zone redistribution , without other evidence of CHF . No pulmonary edema . No focal infiltrate identified . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Cardiomegaly and upper zone redistribution . Otherwise , doubt acute pulmonary process .