A Quality Assurance Approach for Linear Accelerator Mechanical Isocenters with Portal Images

来源 :医学物理学、临床工程、放射肿瘤学(英文) | 被引量 : 0次 | 上传用户:wlliser3d
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Purpose: With usually a millimeter-level PTV margin, stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT) pose a stringent requirement on the isocentricity of the Linac. This requirement is partly fulfilled by routine isocenter q
其他文献
Image noise analysis of a large ring PET scanner “macro PET” performed using two different phantoms, namely a Jaszczak SPECT phantom and a uniform cylindrical
Objective: To investigate the effect of onboard image (OBI) system-based image guided radiotherapy (IGRT) on the precision of fractionated intensity modulated r
Relative biological effectiveness (RBE) is an important quantity in planning particle beam cancer therapy. In general, the RBE describes the biological effectiv
主流媒体是以主流群体为核心受众,通过理性报道传播社会主流价值观,产品链符合媒介融合趋势,在公众中具有巨大公信力和影响力的权威性媒体。主流媒体是一种高利润、高回报、具有
“链接”这个词来自于网络。在网上,与一条消息相关的东西,只要找得到“地址”,链接起来十分方便。在报纸时事报道中,人们发现,做“相关链接”既显得必要,也十分方便。
优秀的媒体人尊崇媒体的社会价值和作用,并以自身的职业表现为之添誉增彩。他们知道,传播一旦缺失了公信力,媒体就什么也没有了。
跟骨关节内移位骨折(DIACFS)属于常见疾病之一,主要是由交通事故或高处坠落等高能量致伤力导致,治疗方式主要有单纯保守治疗(非手术治疗)与手术治疗两大类.目前行单纯保守治疗的d
Introduction: To compare the measured dose distributions to calculated ones in dose-to-water (Dw) and dose-to-medium (Dm) reporting modes for simple plans and p
对市区熟肉制品细菌污染状况进行抽样调查。213份取样中,符合国家卫生标准的仅117份,其中国营,集体和个体单位的合格率分别为71.43%,67.92%和43.22%。调查表明,总体的卫生合格率偏低,尤以个体单位为低。
Background: Treatment of Cervical cancer includes a combination of external beam radiotherapy (EBRT) with intracavitary brachytherapy (ICBT). ICBT helps to boos