螺旋断层放射治疗系统TOMO升级
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带你认识 TomoTherapy螺旋断层调强放射治疗系统1TomoTherapy是什么?TomoTherapy中文称螺旋断层调强放射治疗系统,一般简称为“拓姆刀”,它是目前世界上很先进的一种为治疗癌症的医疗设备。
tomotherapy设备构造比较复杂,但运作机理比较简单,它把6MV加速器集聚在CT机中,根据CT机出的图像来调强放射治疗。
tomotherapy能够360度无死角照射人体,通过一次照射可以放射出数以万千计的子野项目,并且可根据IGRT实时影像作出引导,是目前世界上最先进的放射治疗设备之一。
tomotherapy有非常广泛的临床应用前景和范围,它不仅可以应用于精确治疗的小肿瘤病症,而且也可以用在人体全身大范围的肿瘤治疗中(如全身骨骼调强放射治疗)。
它的适用范围几乎涉及所有放射治疗病症,尤其是调强放射治疗疾病。
2TomoTherapy相比于传统治疗的优势TomoTherapy螺旋断层调强放射治疗系统对比于传统治疗拥有以下几大特点:它调强肿瘤的剂量契合度更高、它调节肿瘤附近的正常组织群的剂量更加精细。
它调节对于肿瘤剂量的强度非常准确。
具体可表现为:2.1 360度无死角照射式旋转,全方位扫描tomotherapy通过6MV加速器集聚在CT机中,根据CT机在线呈现的图像可精确肿瘤的位置,之后可以放射出数以千计的粒子通过螺旋地方式对肿瘤进行精准照射,最后可以精准的把处方肿瘤剂量送到“目的地”,同时也避免或减轻了对于附近其他敏感器官的伤害。
2.2高效优异的图像处理引导功能tomotherapy的螺旋断层调强放射治疗系统的图像和治疗方式均采用同一种放射源——兆伏级射线,在对病人进行放射治疗时使用CT来采集图像数据,它能够使螺旋CT技术和螺旋断层调强放射治疗完美地结合使用。
2.3治疗肿瘤病症范围广,治疗肿瘤的环节少,治疗肿瘤的自动化程度极高tomotherapy螺旋断层调强放射治疗系统集兆伏级CT扫描、精准定位、验证、剂量的计算、完整的治疗计划于一体,因此治疗肿瘤的环节少,所耗时间短,且自动化程度极高。
螺旋断层放射治疗系统(TOMO)辐射环境影响分析摘要:螺旋断层放射治疗系统(TOMO)是采用螺旋CT扫描方式治疗癌症的放射治疗设备,很多医院都购置了此设备以扫描和治疗癌症患者。
本文对某医院配置的螺旋断层放射治疗系统(TOMO)防护能力进行介绍,并对设备周围进行辐射剂量率监测,分析此设备的运行对周围辐射环境的影响。
关键词:螺旋断层;放射治疗;辐射环境一、前言螺旋断层放射治疗系统(TOMO)是采用螺旋CT扫描方式治疗癌症的放射治疗设备,其将6MV的小型加速器安装在螺旋CT机的滑环机架上,该加速器可以产生3.5MVX射线来扫描患者,也可以产生6MV的X射线,用调强后的射线来治疗癌症患者。
螺旋断层放射治疗系统(TOMO)将螺旋CT和医用直线加速器相结合,同时具有影像扫描和放疗的功能,是集3D-CRT、DGRT、IGRT、IMRT、ART功能为一体的放射治疗设备,其特点是将高能X射线束360度旋转聚焦注射肿瘤,靶区适形性佳,剂量分布均匀,使正常组织及器官得到最大限度的保护;同时具有图像引导功能,每次治疗前在治疗机上进行MVCT成像,确认治疗体位在三维空间上与治疗计划一致后再进行放疗,从而保证了治疗的精确性。
本文以某医院为例,对其螺旋断层放射治疗系统(TOMO)开机运行时对周围辐射环境影响进行分析。
二、螺旋断层放射治疗系统(TOMO)概况该医院的螺旋断层放射治疗系统(TOMO)机房位于负二层,南侧为基土层,北侧、西侧和东侧为负二层地下车库,下方为基土层,上方为封闭式空房间。
螺旋断层放射治疗系统(TOMO)技术参数见表1,机房防护能力见表2。
表1 螺旋断层放射治疗系统(TOMO)技术参数表2 螺旋断层放射治疗系统(TOMO)机房屏蔽情况一览表三、辐射环境监测与分析3.1 监测方法与仪器现场监测依据《环境γ辐射剂量率测量技术规范》(HJ 1157-2021)中规定的方法和要求。
监测仪器选用校准有效期内的德国Thermo公司生产的辐射剂量率仪,仪器型号为FH40G,选用FHZ672E-10型探头,能量响应范围40keV~4.4MeV,量程1nSv/h~100µSv/h。
学术论著*基金项目:国家卫生健康委国际交流与合作中心大型医用设备全寿命管理研究项目(2017-S-50-4-4)“螺旋断层放疗系统(TomoTherapy)在我国公立医院应用评估研究”①国家卫生健康委卫生发展研究中心 北京 100044作者简介:邱英鹏,男,(1987- ),硕士,助理研究员,研究方向:卫生政策评价及卫生技术评估。
[文章编号] 1672-8270(2020)12-0001-04 [中图分类号] R812 [文献标识码] ACost-effectiveness analysis of TOMO system/QIU Ying-peng, SUN Tan-lin, ZHAO Yu-xi, et al//China Medical Equipment,2020,17(12):1-4.[Abstract] Objective: T o assess the cost-effectiveness of using tomotherapy (TOMO) equipment of hospital so as to provide references for further configuration and management of equipment. Methods: The relevant information of radiotherapy of 258 patients with nasopharynx cancer, cervical cancer and lung cancer in 3 hospitals (A, B and C) of North China and South China were collected. They were divided into TOMO group (119 cases) and linear accelerator group (139 cases) according to different therapeutic method. The bootstrapping was adopted to calculate incremental cost-effectiveness ratio of cost and effectiveness in treatments of two groups. Results: Compared with linear accelerator, the dose distribution, the reduced radiation dose in part of important organ and the adverse reaction and other short-term effect in TOMO radiotherapy had advantages. Among of them, those of patients with nasopharynx cancer were optimal. And the differences of the received radiation doses on spinal cord and bilateral parotid glands between two groups were significant (t =5.156, t =5.261, P <0.05). But the treatment cost of TOMO group was more expensive, and TOMO group need pay more expenditure which was CNY 765 when reduced 1 Gy radiation dose on important organs of patients with nasopharynx cancer, and TOMO group need pay more CNY 2341 when reduced 1% of poisonousness injure of middle and high level on organ. The differences of average total cost of patients with nasopharynx cancer, patients with lung cancer and patients with cervical cancer in C hospital between two groups were significant (t =5.269, t =4.378, t =3.350, P <0.05). Conclusion: TOMO indicates short-period cost effect in the treatment of the part of indication, but the evidence of long-term cost effect of TOMO is not sufficient, and the long-term effect need further research. [Key words] T omotherapy (TOMO); Cost-effectiveness; Medical expense; Configuration management [First-author’s address] China National Health Development Research Center, Beijing 100191, China.[摘要] 目的:评估医院在用螺旋断层放射治疗设备(TOMO)的成本效果,为设备配置和管理提供参考;方法:收集华北和华南地区3所医院(分别为医院A、医院B和医院C)的258例鼻咽癌、宫颈癌和肺癌3类患者放射治疗相关信息,按照治疗方法的不同,将其分为TOMO组(119例)和直线加速器组(139例);对两组患者治疗中的成本和效果采用自助法(bootstrapping)计算增量成本效果比。
TomoTherapy HI-ART加速器剂量输出稳定性检测与评价管秋;杨波;王欣海;李文博;李楠;邱杰【摘要】目的对TomoTherapy HI-ART加速器剂量输出的稳定性进行检测和评价.方法利用A1SL电离室、矩形固体水模体与圆柱形固体水模体,参照美国医学物理学会TG-148号报告,对TomoTherapy HI-ART加速器质控规程中静态剂量输出、动态剂量输出、射线质稳定性进行检测,并对结果进行分析.结果静态剂量输出结果偏差平均值为(-0.6±1.1)%,有89.1%的数据在±2%的允许偏差范围之内,数据分布无明显规律.动态剂量输出结果偏差平均值为(1.0±1.1)%,有87.1%的数据在±2%的允许偏差范围之内.射线质较为稳定,偏差平均值为(-0.01±1.26)%,80%的结果在±1%的偏差范围之内,96%的结果在±2%的允许偏差范围之内.结论TomoTherapy HI-ART加速器剂量输出稳定性略低于常规加速器,剂量输出易发生波动,因此每日对其输出量进行系统检测十分重要.【期刊名称】《协和医学杂志》【年(卷),期】2013(004)004【总页数】4页(P404-407)【关键词】螺旋断层调强放疗;剂量输出;质量控制【作者】管秋;杨波;王欣海;李文博;李楠;邱杰【作者单位】中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730;中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730;中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730;中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730;中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730;中国医学科学院北京协和医学院北京协和医院放射治疗科,北京100730【正文语种】中文【中图分类】R73-33螺旋断层调强放疗(helical tomotherapy, HT)系统是一种全新的调强实现方式,它是将6 MV的直线加速器安装在螺旋CT滑环机架上,射线经二元多叶准直器调制输出,从而实现360度HT;直线加速器同时可形成3.5 MV的扇形束X射线,患者螺旋扫描后数据由其对侧的探测器(Xe气体成像探测器阵列)收集并经工作站重建,实现图像引导放射治疗[1];在剂量学上具有高适形度及靶区边缘剂量跌落快的特点,能够实现对肿瘤靶区高剂量照射的同时,最大限度地减少周围正常组织受高剂量照射的可能性。
ZHONGGUO YIXUEZHUANGBEI 55综 述①中国医学装备协会 北京 100044②北京国卫嘉和医学装备技术服务有限公司 北京 100044Evaluation of application of TOMO devices/LIU Xiao-zheng, YANG Jian-long// ChinaMedical Equipment,2012,9(9):55-57.[Abstract] Objective: T o comprehensively analyze the configuration and clinical applicationof TOMO devices in China and evaluate their technical features and clinical efficacy to provide reference for reasonable use and scientific development of radiotherapy technology in our country. Methods: The opinions of physicians and technicians were obtained with questionnaire, experts symposium and on-spot inspection. Results: The overall configuration and application of TOMO devices in China was preliminarily investigated. Meanwhile, the advantage of their clinical features and therapeutic efficacy were summarized to determinethe suitable range for their application. Then we put forward the plan and suggestion for their configuration and development. Conclusion: The TOMO devices can be configured based on the clinical indications and principle of orderly development. They should be firstly configured in grade-III hospitals in big cities.[Key words] TOMO; T echnical feature; Clinical application; Evaluation[First-author’s address] China Association of Medical Equipment, Beijing 100044, China.[摘要] 目的:综合分析我国螺旋断层放射治疗(TOMO)设备的配置和临床应用情况,评价TOMO 的技术特点和临床疗效,为推动放射治疗装备技术合理利用和科学发展提供参考。
学术论著*基金项目:国家卫生健康委国际交流与合作中心大型医用设备全寿命管理研究项目(2017-S-50-4-4)“螺旋断层放疗系统(TomoTherapy)在我国公立医院应用评估研究”①国家卫生健康委卫生发展研究中心 北京 100044②中国药科大学国际医药商学院 江苏 南京 211198作者简介:肖月,女,(1978- ),博士,研究员,研究方向:大型医用设备及高值医用耗材卫生技术评估方法学研究及实践,大型医用设备配置应用绩效评价指标体系研究,国家儿童药品临床综合评价方法及工具研发。
[文章编号] 1672-8270(2020)12-0008-05 [中图分类号] R812 [文献标识码] AAnalysis on the application status of TOMO system in public hospital of China/XIAO Yue, QIU Ying-peng, SHI Li-wei, et al//China Medical Equipment,,2020,17(12):8-12.[Abstract] Objective: T o conduct surveys on status and problems of tomotherapy (TOMO) systems which were configurated and applied in 5 public hospitals of 4 provinces or city so as to provide references for formulating policy of supervision and administration of medical equipment of class A and class B. Methods: The information data of configuration and maintenance, application management, pricing and payment were collected through hospital information system database, the symposium and interview. Results: The cost of configuration and maintenance of equipment of hospital was high, and hospital conscientiously chose disease with indication of TOMO preponderance to develop treatment and to control the average daily amount of patients. There were differences in service conditions of TOMO system in the organizations of different regions due to the influences of the situation of patients, charge pricing and internal management system. The largest difference of the amount of treated patients in each year among different organizations was 1.64 times. There was difference in the selection of disease group among different organizations. Conclusion: The corresponding management department of hospital should strengthen the planning management of equipment configuration, and promote the depth of centralized procurement, and enhance force of bringing down price by negotiation, and promote the constructions of standard management and quality control system, and modulate the police of pricing and charge, and guide technique to achieve biggest effect.[Key words] T omotherapy (TOMO); Configuration and planning; Supervision and managemen; Status analysis [First-author’s address] China National Health Development Research Center, Beijing 100191, China.[摘要] 目的:调研分析北京、广东、云南、山东等4省市5家公立医院配置应用螺旋断层放射治疗(TOMO)系统的现况与问题,为甲乙类医用设备监督管理政策制定提供参考。
TOMO高剂量少分次放疗治疗消化道肿瘤继发腹膜后转移瘤的临床效果分析计划及调整剂量分布。
随访获取放疗后疗效及毒副反应。
结果:共计27例患者,男女比例16:11,中位年龄52岁,消化道肿瘤继发腹膜后淋巴结肿瘤病灶3.69cm³-1353.5cm³。
放射治疗剂量模式主要采取的病灶靶区总剂量60Gy-70Gy 15,20,25次,中位剂量值66.6Gy,病灶BED10范围37.5Gy-100.8Gy,中位等效生物剂量值为76.8Gy,重复治疗,5次/周。
所有的患者全部按计划完成治疗。
继发腹膜后淋巴结肿瘤的完全缓解率(CR)为40.74%(11/27),部分缓解率44.44%(12/27),稳定率(SD)11.11%(3/27),局部进展率(PD)3.70%(1/27),至放疗结束总缓解率为96.30%。
治疗过程中放射反应作用较轻,其中发生≥2级以上急性反应:食欲不振29.62%(8/27),恶心呕吐33.33%(9/27),疲劳乏力25.93%(7/27),胃肠炎7.40%(3/27)。
27例病人在治疗后3-6个月复查B超或CT,继发腹膜病灶消失16例(59.26%),缩小10例(37.04%),变化不大1例(7.40%),总有效率为96.30%。
分析显示肿瘤缓解率与原发肿瘤大小无关。
而与肿瘤放射治疗剂量、肿瘤和肠管间距离相关。
结论:采用TOMO设备按照高剂量少分次的模式治疗消化道肿瘤继发腹膜后淋巴结肿瘤方法可行,不良反应可耐受。
螺旋断层放射治疗系统;继发腹膜后转移瘤; 放射治疗R743 A 1004-7484(20__)03-0231-011 资料与方法回顾性分析20__年12月至20__年1月在空军特色医学中心(原空军总医院)肿瘤放疗科治疗的27例消化道肿瘤继发腹膜后淋巴结转移瘤。
根据病史,CT、B超、MRI、或PET-CT 等影像学检查,27例病例确診为消化道肿瘤继发淋腹膜后淋巴结转移瘤。