The calculating mode of main physical modules is outlined. Finally, three modules estimation, measuring results of examples of wind field, atmospheric dispersion and dose are presented. 文中简述了主要物理模块的计算模式,最后介绍了风场预测、大气扩散与剂量估算三个模块及例题的测试结果。
In view of the cylinder source and the static irradiation from, the dose rate of irradiation field and the dose distribution and uniformity in product box were measured in order to control sterilization quality. 针对柱状钴源结构和静态辐照方式的特点,为控制灭菌质量,进行了辐照场和产品箱内剂量分布和剂量均匀度等测量。
Objective: to study the dosimetric error in wedge field dose calculation. 目的:研究楔形野剂量计算中的误差,并探讨解决方法。
According to the shape of irradiation field, we advance two kinds of dose calculation models separately for high-energy X-ray regular and irregular field, thus achieving the compromise precision and speed. 文中根据照射野形状,将高能X射线分成规则野和不规则野两种类型,通过建立相应的剂量计算模型以取得折衷的计算精度和速度。
The field γ Radiation dose rate in the east and northeast areas were abnormal low, while in the west area and the Thanks of mid-Huangpu River were rather high. 上海市环境辐射场的特点是:原野γ辐射剂量率,东部和东北部较低,西部和黄浦江中游两岸稍高;
Conclusions: The width of narrow strip field and energy had significant influence on the effective therapeutic depth, and that must be taken into account in field design, energy choice and dose calculation. 结论:窄条野的窄边宽度和射线的能量,对有效治疗深度有一定影响,临床在进行射野设计、能量选择和剂量计算时应予以考虑。
The optimization factor designed for rotation speed and quasi conformal field was used to improve the dose distribution. 在剂量计算中,设计了一个用于合理调节射束旋转速率的优化因子,并用半适形野取代单一野,以利于改善剂量分布。
The discussion of irregular field prescription dose calculating method for low and middle energy X-rays 中低能X射线不规则野的处方剂量计算方法探讨
Study on the Numerical Simulation of Radiation Nuclide Mass Field and Radiation Dose for Marine Biota in Daya Bay 大亚湾放射性物质场数值模拟和海洋生物辐射剂量的研究
We suggest the measurement of wedge field depth dose for the accurate dosimetry. 为精确治疗,我们建议应测量楔形野的剂量数据。
The dosimetric properties of a gamma radiation field can be measured by a dose rate meter or by a gamma spectrometer with spectrum dose conversion. 辐射场剂量特性的测量可以通过剂量率仪或谱剂量转换的方法来实现。
At last, some problems, such as the translating technique from flux field to dose field, the calculation of multi-seed, and the calculation of no-standard seed are discussed in chapter four. 在第4章,作者讨论了通量场向剂量场转换中所存在的一些问题,讨论了单源剂量场与多源剂量场之间的关系,也根据实际需要讨论了非标准源所存在的一些问题。
Patients with brain lesions of 1-3 received WBRT at a dose of 40 Gy and then small field to a total dose of 60 Gy. 脑转移灶1~3个者,全脑放疗40Gy后,缩野放疗至总量60Gy;
Analysis and correction of dosimetric error in wedge field dose calculation 楔形野剂量计算中的误差分析和修正
The Influences of the Leaked Current from the Field Oxide Induced by the Total Dose Radiation on the Performances of CMOS Amplifiers 辐射感生场氧漏电流对CMOS运算放大器特性的影响
Research on Quality Assurance Methods of Proton Dose Field Based on Dose Film Analysis 基于胶片分析的质子剂量场质量控制方法研究
However when electrons are injected into the storage ring, the radiation field becomes a fast changing field with a very high dose level. 注入阶段,辐射场是一个占空因子很小、辐射水平很高的瞬发辐射场;
Analysis of field and dose distribution measurement. 辐射场分析及剂量分布测量等。
However, the apoptosis cells were observed in the peripheral tumor field, which received the lower dose of radiation. 肿瘤的周边区域可观察到早期凋亡细胞。
Treatment relevant factors such as the width and length of anterior irradiation field and posterior oblique field, total dose, total treatment time, immediate response were prognostic factors for the survival. 治疗相关因素如前垂直野宽、野长、后斜野宽、野长、总剂量、总疗程时间、即时疗效和近期疗效对生存也有显著影响。
Influence of field size on electron beam central axis dose on a radiotherapy linear accelerator 电子束照射野面积对中心轴剂量和输出因子的影响
And the influence factors such as gantry angle, field size and acquisition mode on the dose response curves were investigated through obtaining a set of dose response curves for different gantry angle, field size and acquisition mode. 通过在不同机架角、射野大小及获取模式条件下测量一系列剂量响应曲线并加以分析比较,研究了EPID的剂量响应与各种影响因素之间的关系。
The experiment gives the optical flow field vector diagram and dose volume histogram of the parotid. 通过实验给出光流场向量图和腮腺剂量体积直方图。
Many radiation accidents are due to the lack of high sensitivity field radiation dose monitoring instruments. 许多辐射事故的发生都是由于现场缺少高灵敏度的辐射剂量监测仪器而引起的。
To insure the accuracy of intensity modulated radiotherapy, the Field shape and dose of radiotherapy was verified with special hardware and device. 为确保调强放射治疗的精确,本论文利用自制和专用设备对每个射野的位置、形状和野内剂量分布进行了验证。