【摘要】 目的：本文研究了我院Ｘ－刀治疗颅内肿瘤过程中ＣＴ定位的精度及ＣＴ扫描方法。方法：应用人体头颅模型内特定标记物测定ＣＴ定位的精度，在临床工作中应用不同的扫描方法对颅内肿瘤进行ＣＴ定位，观察其效果。结果：利用头颅模型测定的ＢＲＷ头环ＣＴ定位精度为０．６５ｍｍ，最大误差为１．０９ｍｍ。对３５例颅内肿瘤病人进行Ｘ－刀ＣＴ定位，选择了直接强化、延迟３分钟和５分钟强化的方法，分别扫描脑膜瘤、听神经瘤、转移瘤、胶质瘤和垂体瘤，多数患者肿瘤强化明显，肿瘤边界显示清晰，效果满意。结论：我院Ｘ－刀治疗ＣＴ定位精度高，对颅内肿瘤患者的肿瘤定位效果较好，符合Ｘ－刀定位的要求。更多还原

【Abstract】 Purpose:This article study the accuracy and method of CT scanning in localization of intracranial tumor in X knife treatment.Method:Measure the CT localization acuracy using special markers in skullphantom and clinical use of different CT scanning method inlocalization of intracranial tumor during X knife treatment.Results:The accuracy of CT localization of BRW headring using skull phantom is 065mm averagely,maximum error is 109mm During X knife treatment,the method of CT scanning for localization of intracranial tumor is:immediat enhancement for meningiomas,acoustic neurofibromas and metastatic tumors,delayed 3 minutes enhancement for gliomas and delayed 5 minutes enhancement for pituitary tumors.Most of tumurs of 35 patients have been obviously enhanced,and show clear rims,all obtain satisfactory results for X knife treating.Conclusion:The accuracy and results of CT localization of intracranial tumor is suitable and dependentable for X knife treatment in our hospital.更多还原