Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal portable chest radiograph in semi-erect position demonstrates an NG tube in place , the tip is within the stomach . There is unchanged minimal bibasilar atelectasis . There is no effusion or pneumothorax . The heart size is top normal . The mediastinal contours are normal . Calcification is noted of the aortic knob . There is severe degenerative change at both glenohumeral joints .
    OUTPUT:
    
1 . NG tube tip located in the stomach . 2 . No acute chest abnormality , unchanged from ___ .