Object: Using computer to calculate average energy lost by photons at every points in each body, in order to determine the dose distribution of photon radiation in the water phantom.
目的:用电脑计算在每个物体中每点处点源释放出的原始光子和平均能量损失,以获得光子线在水模体中的剂量分布情况。
Conclusions: the beam Angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volume target with the increment of beam number.
结论:照射野方向和照射野的数目对剂量分布有影响,增加照射野的数目可以改善体积较大的病灶的剂量分布。
Dose distribution in water is calculated for normal incidence of proton beams.
计算了质子束垂直入射于水中的剂量分布。
One of the major disadvantages of MRI is its image distortion, which affects the accuracy of the localization of SRT and the veracity of the dose distribution.
对MRI而言,由于存在着影像扭曲的问题,因此影响了SRT定位的精确性,并进一步影响了剂量分布的准确性。
For obtaining the distribution of absorbed dose in tumor and surrounding tissues after implant of seeds, the software, Interstitial Treatment Planning System of seeds (ITPSS 1.0) was programmed.
为获悉种籽源植入后在肿瘤及其周边组织中吸收剂量分布。本文编制了“种籽源治疗计划系统”ITPSS 1.0。
Purpose: Simulating calculation the dose distribution of the total body irradiation (TBI) with three dimension treatment planning system (3d-tps).
目的:采用三维治疗计划系统(3d - TPS)模拟计算全身照射(TBI)的剂量分布。
The effect of adsorbent dose on distribution coefficient implied the surface of adsorbent was heterogeneous.
吸附剂量对分配系数的影响表明吸附剂表面是不均匀的。
We firstly obtained the depth distribution of total dose inside satellite.
取得了卫星内部的总剂量深度分布结果。
The results showed that the dose distribution in the irradiation field was uniform. The demands of scientific research and radiation processing were met satisfactorily.
结果表明,辐射场的剂量分布比较均匀,可以满足科研和辐照加工的需要。
Objective To measure and evaluate the distribution feature of radiation dose at the conventional puncture plane in invasive diagnosis and treatment area, and depict the corresponding isodose curve.
目的测量和评价介入诊疗区域内常规穿刺平面辐射剂量的分布特点,绘制相应的等剂量曲线示意图。
The depth profile distribution of Ag closes to Gauss Distribution, and its peak moves to the surface of the film with the increase of Ag doped dose.
注入的银离子在薄膜中呈近高斯分布,分布峰随注入剂量的增加而向表层移动。
The distribution of titanium on the surfaces of lead and lead-antimony alloy is related to the dose of implanted titanium.
钛在铅和铅锑合金表面上的分布与钛的注入剂量有关。
Because heavy ion has the characters of high-LET value and sharp Bragg peak for dose distribution.
因为重离子具有高传能线密度(LET)及剂量分布呈尖布喇格峰的特点。
This method can obtain the real 3-d dose distribution in radiotherapy because of the use of human real image data and the accuracy of Monte Carlo method in computing the particle transportation.
由于采用人体的真实图像数据,以及蒙特卡罗方法计算粒子输运时的准确性,该方法能够得到真实的三维剂量分布。
Analysis of bone relative dose distribution may help to reveal the relationship of the dose response.
结果提示对骨的相对剂量分布的分析有助于进一步阐明剂量-响应关系。
There are two kinds of objective functions in radiotherapy inverse planning: dose distribution-based and Dose-Volume Histogram (DVH) -based functions.
目前放疗逆向计划中常用的目标函数有两种:基于剂量分布的目标函数和基于剂量-体积直方图(DVH)的目标函数。
Fuzzy weight function algorithm is used for optimization, but it suffers a shortcoming of sawtooth dose intensity map distribution.
模糊权重算法是一种优化算法,但该算法存在一个缺陷——剂量强度图谱分布上有锯齿现象。
Objective To investigate the relation of pelvic threedimensional conformal radiotherapy (3DCRT) target with rectal dose distribution and irradiation volume in cervical cancer.
目的探讨宫颈癌盆腔适形放疗时靶区及直肠剂量分布与受照射体积的关系。
Objective To study the dose distribution of different bolus after different energy electron beam irradiation to different chest wall radiotherapy for the patients with breast cancer.
目的:对乳腺癌术后胸壁放射治疗时不同能量电子线照射不同厚度组织等效膜产生的剂量进行测量及分析。
In general, the initial dose depends on the volume of distribution, and maintenance doses depend on clearance.
一般而言,表观分布容积决定初始剂量,总清除率决定维持剂量。
The results are as follows: The distribution pattern of larvae is aggregative ( negative binomial distribution) . The aggregation dose not change with the densities of population of leaf miner.
结果表明:烟草潜叶蛾幼虫在田间呈聚集分布,聚集强度不因种群密度的改变而改变。
RBM (Regular Beam Model) dose engine is a kind of analytical method based on the measured database, which can calculate the dose distribution of the 3-D water box.
是一种基于测量数据库的解析剂量计算方法,可以用来计算三维纯水箱中的剂量分布信息;
Three beam scheme is the optimal choice of conformal radiotherapy plan for esophageal carcinoma as concerning the dose distribution to lung and spinal cord.
综合考虑对脊髓和肺的影响,三野计划为食管癌适形放疗的较优方案。
However, most distribution network dose not realize automation, which makes it difficult to get the real-time operation data of the distribution network.
但是,由于大部分配电网并没有实施配网自动化,使得配网运行的实时数据难以获得。
However, most distribution network dose not realize automation, which makes it difficult to get the real-time operation data of the distribution network.
但是,由于大部分配电网并没有实施配网自动化,使得配网运行的实时数据难以获得。
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