Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . The lungs appear clear . The right lower mediastinum has a bulging contour which may be associated with an abnormality of the right atrium .
    OUTPUT:
    
1 . No evidence of acute disease . 2 . Bulging right atrial contour ; this appearance is not necessarily abnormal but follow - up echocardiogram should be considered in addition to correlation with clinical history .