患者，女，６６岁。诊断为颅内鞍旁肿瘤。因尾骨严重摔伤，不能按立体定向治疗要求平卧，为了不影响患者治疗，我们采用头部可重复摆位头环和面膜固定。在做头膜面罩时先让患者侧卧床面，然后慢慢转动身体，同时头部随身体一起转动至头部达到立体定向（ＳＲＴ）治疗的要求并在 Patient, female, 66 years old. The diagnosis was intracranial parasellar tumor. Due to a severe fall of the coccyx, supra-stereotherapy may not be required to lie supine. In order not to affect the patient’s treatment, we use a head repeatable headband and mask. When the head mask is worn, the patient is allowed to lie on the bedside first, then slowly rotate the body while the head rotates with the body to the head to achieve the requirements of stereotactic (SRT) treatment and