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目前临床确诊的恶性肿瘤多为Ⅱ~Ⅲ期, 而手术切除率也不超过30%[1], 如肺癌、肝癌和直肠癌; 如伴有淋巴结转移, 单纯手术治疗的一年生存率很低。近80年来, 采用手术、放疗、化疗等手段进行综合性治疗肿瘤取得了较大的进展。目前, 多采用术前或术后远距离外照射治疗, 但该法常致患者器官功能明显下降, 正常组织受到不同程度的损伤, 生活质量降低; 术中放疗只能一次大剂量照射, 疗效欠佳, 不良反应大, 且手术配合复杂, 设备昂贵。125I粒子植入疗法是根据计算机三维治疗计划系统(treatment planning system, TPS), 将125I粒子植入到肿瘤部位, 通过125I粒子释放低剂量的γ射线, 达到持续放射治疗的目的。此方法简单, 对正常组织损伤小、疗效好。
术中125I粒子植入治疗肿瘤的临床应用
The clinical application of 125I radionuclide implantation in tumor therapy
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摘要:
目的 探讨在手术中永久性植入125I粒子治疗脑瘤、肝癌、胆管癌、肺癌、直肠癌、前列腺癌及恶性畸胎瘤临床应用的安全性及疗效。 方法 回顾性分析38例经穿刺活检、组织学或细胞学检查确诊的肿瘤患者,采用治疗计划系统(TPS)重建肿瘤的三维图像,计算出粒子植入的数量和剂量分布曲线,125I粒子治疗肿瘤处方剂量为60~120 Gy,每例植入粒子6~40颗,中位粒子数为23颗。 结果 随访12个月,肿瘤完全缓解9例,部分缓解24例,无变化5例。12个月总有效率为86.8%。 结论 术中植入125I粒子治疗肿瘤是一种安全、有效的方法。 -
关键词:
- 碘放射性同位素 /
- 近距离放射疗法 /
- 肿瘤 /
- 放射治疗计划, 计算机辅助
Abstract:Objective To investigate the safety and clinical efficacy of permanent implantation of 125I radioactive particle in the surgery of malignancies such as brain tumors, liver cancer, cholangiocarcinoma, lung cancer, prostate cancer and malignant teratoma. Methods Thirty eight patients proved by puncture biopsy, his-tology or cytology were retrospectively analyzed.Three-D images of the tumor were reconstructed using treat-ment planning system(TPS), the number and the dose rate distribution of 125I seeds were calculated.The matched peripheral dose of 125I seeds implantation was 60~120Gy, the number of 125I seeds implanted ranged from 6~40 per lesion, and the median amount of implanted 125I seeds were 23. Results Twelve months followup after the therapy showed 9 cases of complete relief, 24 cases of partial relief and 5 cases of no change.The overall effective rate(complete relief+partial relief)of 12 months was 86.8%. Conclusion Permanent implantation of 125Iradioactive particle in the surgery of malignancies treatment is a safe, effective treatment fortumors. -
[1] Pang LJ. Radiation oncology update. Hawaii Med J, 2003, 62(5): 109-110. [2] 王洪武. 现代肿瘤靶向治疗技术. 北京: 中国医药科技出版社, 2005: 342-357.
[3] 王俊杰, 修典荣, 冉维强. 放射性粒子组织间近距离治疗肿瘤. 2版, 北京: 北京大学医学出版社, 2004: 49-62.
[4] Hakenberg OW, Wirth MP, Hermann T, et al. Recommendations for the treatment of locaiized prostate cancer by permanent interstitial brachytherepy. Urol Int, 2003, 70(1): 15-20. doi: 10.1159/000067699 [5] Cumberlin RL, Coleman CN. New directions in brachytherapy. Int J Radial Oncol Biol Plys, 2002, 53(1): 6-11. doi: 10.1016/S0360-3016(02)02718-9 [6] 匡安仁, 谭天秩. 射性核素治疗的发展与思考. 中华核医学杂志, 2003, 23(6): 325-326.
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