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目的:探讨CT扫描下面罩固定和标记定位技术在脑肿瘤放疗设野中的价值。方法:利用面罩固定和标记定位技术,对15例脑肿瘤患者作了带面罩CT扫描后颅内病灶颅表定位设野放疗。结果:常规定位法的“肿瘤靶区”A与面罩固定标记定位法的“肿瘤靶区”B相比,靶区边界差异范围在0 cm～3 cm之间,其中边界改动0 cm～1 cm者有2例,边界改动1 cm～2 cm者有8例,边界改动2 cm～3 cm者有5例。以改动大于1 cm为“校正”的标准,证实面罩固定标记法对设野的校正率为87 %。结论:面罩固定和标记定位技术能提高脑肿瘤放疗中颅表定位设野的精确性和重复性。
OBJECTIVE: To investigate the value of mask fixation and marker localization in brain tumor radiotherapy under CT scan. Methods: Fifteen cases of brain tumor patients were treated with mastectomy and scrotal skull surface radiotherapy with mask fixation and marking technique. Results: Compared with the “tumor target zone” B of the mask fixation marker localization method, the difference of the target zone boundaries was between 0 cm and 3 cm in the conventional tumor targeting method and the boundary was changed between 0 cm and 1 cm There are 2 cases, 8 cases of border change 1 cm ~ 2 cm, 5 cases of border change 2 cm ~ 3 cm. To change more than 1 cm for the “calibration” standard, confirmed mask fixed mark on the field of correction rate of 87%. Conclusion: The mask fixation and the marker localization technique can improve the accuracy and repeatability of skull positioning in brain tumors during radiotherapy.