Conclusions The mean target center method is feasible for small lesion of lung carcinoma treated with 3d CRT.
结论靶区中心的平均位置法应用于肺部小肿瘤的三维适形放射治疗是可行的。
Objective To study the feasibility of mean target in three dimensional conformal radiotherapy (3d CRT) for small lesion of lung carcinoma.
目的探讨靶区中心的平均位置应用于肺部小肿瘤三维适形放射治疗的可行性。
Results Taget dose uniformity:The dose uniformity in target for two IMRT techniques, 3D CRT and Field in Field technique were improved in trend compared with conventional technique.
结果五种技术靶区剂量均匀度的优劣：3D和调强技术比常规技术有改善趋势。
Methods To do quality control experiments to simulate the process of 3D-CRT by means of Topsland system, radiation treatment -planning system, laser light, bow form ruler, head model.
方法采用拓能系统的固定装置、计划系统、激光灯、弓形尺、头部模型（简称头模）模拟3D CRT的实施过程进行质量控制分组实验。
The LSD to normal tissues of patients receiving IMRT was about 1.5 times that of 3D-CRT patients.
IMRT病人射野外正常组织所受散射线和漏射线剂量约为3D-CRT病人的1.5倍。
Objective: To compare dosimetry of 3D-CRT and IMRT plan for para-aortic lymph node tumor metastasis.
目的：比较腹主动脉旁淋巴结肿瘤转移的3D-CRT和IMRT放射治疗计划的剂量学差异。
Conclusions the treatment of 3d-crt and radiation therapy is effective for single metastatic brain tumor.
结论3d -CRT合并全脑放射治疗肺癌单发脑转移是种行之有效的治疗方法。
Objective To evaluate the effect of 3-dimensional conformal radiation therapy (3d-crt) and radiation therapy for single metastatic brain tumor on lung cancer.
目的探讨应用3d - CRT联合全脑照射治疗肺癌单发脑转移的临床作用。
The 3D structure of the tissue can be realistically displayed on computer CRT by 3D ultrasonic reconstruction system, which processes traditional two-dimensional (2D) ultrasonic images.
将传统的二维断层图像用三维超声重建系统进行处理，能在计算机屏幕上形象逼真地显示人体器官和组织的立体视图。
Sandwich treatment of interventional chemotherapy , 3D-CRT and interventional chemotherapy was given .
目的探讨三明治法对晚期肺癌的近期疗效。
We studied the effects and side effects of the three dimensional conformal radiation therapy (3D-CRT) for the children with medulloblastoma, and summarized the reasons of failure of the therapy.
本研究探讨髓母细胞瘤行三维适形放射治疗的疗效、毒副作用及其失败的原因。
We studied the effects and side effects of the three dimensional conformal radiation therapy (3D-CRT) for the children with medulloblastoma, and summarized the reasons of failure of the therapy.
本研究探讨髓母细胞瘤行三维适形放射治疗的疗效、毒副作用及其失败的原因。
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