Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the previous radiograph , no relevant change is noted . Normal lung volumes . Borderline size of the cardiac silhouette without pulmonary edema . No pleural effusions . No parenchymal opacities suggesting pneumonia . Normal hilar and mediastinal contours .
    OUTPUT:
    
Unchanged radiographic , no pneumonia .