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医科达Versa HD直线加速器Agility治疗机头光学系统故障维修2例
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作者 张征 刘帅蓬 +1 位作者 郑光召 郭跃信 《医疗卫生装备》 CAS 2024年第7期118-120,共3页
简要介绍了医科达Versa HD直线加速器Agility治疗机头光学系统的工作原理,分析了该系统在日常使用中出现的2例故障的原因并给出了故障排除方法,为临床工程师排除类似故障提供了参考。
关键词 医科达Versa HD直线加速器 Agility治疗机头 光学系统 故障维修
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点扫描质子束治疗机头的蒙特卡罗模拟和验证 被引量:4
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作者 盛尹祥子 Kambiz Shanazi +5 位作者 王巍伟 黄志杰 Nickii Schlegel 张俊昱 孙家耀 赵静芳 《中华放射医学与防护杂志》 CAS CSCD 北大核心 2019年第8期635-640,共6页
目的利用蒙特卡罗程序模拟点扫描质子束治疗机头,建立精准的质子束流蒙特卡罗模拟计算模型。方法利用蒙特卡罗程序FLUKA,结合上海市质子重离子医院治疗机头几何结构,建立点扫描质子束治疗机头的蒙特卡罗模型。通过对不同能量下水中积分... 目的利用蒙特卡罗程序模拟点扫描质子束治疗机头,建立精准的质子束流蒙特卡罗模拟计算模型。方法利用蒙特卡罗程序FLUKA,结合上海市质子重离子医院治疗机头几何结构,建立点扫描质子束治疗机头的蒙特卡罗模型。通过对不同能量下水中积分深度剂量分布,等中心点处空气中束斑大小的测量和模拟,建立精准的模拟模型。利用该模型模拟质子束扩展布拉格峰,并与对应治疗计划系统(treatment planning system,TPS)计算结果进行比较分析。结果对于射程末端90%积分深度剂量值,各能量下模拟和测量的偏差均不高于0.5 mm。而对于80%至20%末端跌落,各能量质子的模拟和测量的偏差在0.1 mm以内。质子束流束斑大小的模拟与测量结果偏差最大为0.45 mm。对扩展布拉格峰的剂量验证的模拟与TPS计算结果进行对比,γ分析通过率高于90%(2 mm,2%标准)。结论利用蒙特卡罗程序FLUKA可以建立点扫描质子治疗机头模型,该模型满足临床要求,可以精确地模拟点扫描质子束的输运。该模型通过测量验证,可以作为剂量验证工具,评估临床治疗计划,能够减少剂量验证所需的束流时间,从而增加患者治疗数量。 展开更多
关键词 蒙特卡罗 质子治疗 治疗机头 点扫描
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Effect of electro-scalp acupuncture on acute ischemic stroke: a randomized, single blind, trial 被引量:7
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作者 Liu Xiaoxi Zhang Xuezhu +5 位作者 Nie Kun Jia Yujie Li Jing Ling Zhenzhen Wang Yao Chang Shichen 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2018年第1期95-100,共6页
OBJECTIVE: To determine the clinical efficacy and safety of electro-scalp acupuncture in the treatment of patients with acute ischemic stroke. METHODS: Totally 74 patients with acute ischemic stroke were enrolled an... OBJECTIVE: To determine the clinical efficacy and safety of electro-scalp acupuncture in the treatment of patients with acute ischemic stroke. METHODS: Totally 74 patients with acute ischemic stroke were enrolled and divided into either body acupuncture (Control) or electro-scalp acupuncture (ESA) groups according to randomized controlled principle. The patients in the control group were given body acupuncture treatment once daily for 28 d, whereas except for the body acupuncture, electro-scalp acupuncture was additional treatment given to the ESA group. Neurological deficits, everyday motor function and muscle strength were evaluated at baseline and the 28th d by NIH Stroke Scale (NIHSS), FugI-Meyer Assessment (FMA) and Modified Barthel Index Score (MBI), respectively. RESULTS: There were not obvious between-group differences in the baseline efficacy parameters (NI- HSS, FMA and MBI) (all P 〉 0.05), whereas signifi- cant between-group differences were found in post-treatment NIHSS, FMA-UE and MBI scores (all P 〈 0.05). After acupuncture treatment, systematic within-group improvements were found in the two groups for any of the efficacy parameters assessed (all P 〈 0.01), and the ESA group showed higher significant improvements in NIHSS, FMA-UE and MBI scores (all P 〈 0.05). CONCLUSION: Electro-scalp acupuncture was efficacious in the treatment of acute ischemic stroke, which resulted in meaningful improvements in neurologic function, motor function and activities of daily living of patients. 展开更多
关键词 STROKE Scalp acupuncture Neurologic manifestations Motor disorders Activities of daily living
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