颌下腺体内及输出导管起始部涎石在下颌横断咬哈片、须下晚例位平片上有时不能清楚地显示。近几年，我们采用一种新的投照方法，即：下压颌下晚使腺体向下移位再拍颌下腺侧位争片的方法对7例疑诊为此类延石病的患者进行了X线诊断．其中5例显示了诞石影像，诊断为颌下腺诞石病； Submandibular gland and the beginning of the output catheter salivary bite in the mandibular transection Ha films, the next case to be flat film sometimes can not be clearly displayed. In recent years, we use a new method of projection, that is: the next submandibular gland downward shift and then the method of submandibular gland flaring films on the 7 cases of patients suspected of such promontosis X-ray diagnosis was performed. 5 cases showed the birthstone image, diagnosis of submandibular gonadal disease;