Production principle, character and primary influence factors of Descartes ray are studied by experiments on the basis of theoretical analysis.
在理论分析的基础上，通过试验着重研究了纤维笛卡尔线的产生机理、特征和主要影响因素。
The presented results also include the relations between scattering factors with therapeutical fields and the distances of primary X-ray source and target plane.
比较的结果还包括均整块和初级准直器的散射与射野大小及离开X射线源距离之间的关系。
In inversion, the slowness at points on ray path can be calculated by using three order polynomial primary function.
在反演计算中，射线轨迹点处的慢度可用三次多项式基函数予以计算。
A radiation transfer model is proposed for tree model based on forward ray tracing. The model hypothesis, processing flow and primary algorithm are expounded.
针对树木模型提出正向光线跟踪的辐射传输模型，并详细阐述了模型假设、处理流程与主要算法。
The intensity of the secondary radiations is weak compared with the intensity of the primary X-ray beam, and some of it, too, may not escape from the material.
这些次级放射线的强度跟原始x射线相比较弱，而且其中的一部分可能留在了那种物质中。
Objective To analyze the double contrast X ray findings of the primary gastric malignant lymphoma.
目的探讨原发性胃恶性淋巴瘤的双对比X线征象。
Objective To research X-ray and CT findings and diagnosis of primary non-Hodgkin lymphoma of the bone.
目的探讨骨原发性非何杰金氏淋巴瘤的X线与CT表现及诊断要点。
The X-ray appearances of primary dilated cardiomyopathy could be divided into left, right and biventricular types.
原发性扩张型心肌病X线表现分为左心型、右心型和普大型。
The X-ray findings of 15 cases of primary hypophosphatemic vitamin D resistant rickets(PHVDRR)are presented.
本文报道15例原发性低血磷抗维生素D佝偻病的X线表现。
Objective To discuss the clinical and X-ray representations and to improve the knowledge of primary alveolar sarcoma of the bone .
目的探讨原发性骨腺泡状肉瘤的临床及X线表现，提高对该肿瘤的认识。
The clinic and X-ray manifestations of 88 cases of primary lung cancer in young patients, aged under 35, were analyzed.
本文分析了我院88例35岁以下青年人原发性肺癌的临床及X线表现。
A suggestion was made to measure thin-film thicknesses using second X-ray fluorescence from substrate excited by primary X-ray of plating element, and corresponding equations were derived.
为了弥补目前采用的各种镀层厚度测量方法之不足，本文提出利用镀层元素一次X光激发的基底金属二次荧光进行膜厚测量的设想，并推导出相应的计算公式。
In this paper, a method for quantitative determination of spectral distributions of primary radiation from X-ray tubes for diffraction and X-ray fluorescent spectral analysis is presented.
本文提出了衍射或荧光分析用的X射线管原级X射线谱强度分布的定量测定方法。
The next stage will be for an x-ray equipment company to integrate the software with its products, and once it's available to dentists we'd hope that entire primary care trusts might opt in.
下一步的工作是将该软件与X线仪器公司的产品进行整合，一旦牙医可使用该仪器，我们希望全部的基本护理机构都能够加入使用的行列。
Aberrations of the primary type, expressed in their matrix forms, are used to write the generalized ray transfer matrix of an optical component.
光学元件的广义光线传递矩阵可用初始型像差的矩阵形式表达。
Methods 30 postmenopausal cases with primary spinal osteoporosis and centrum compression, which confirmed by X-ray film and clinical data, were enrolled in this study.
方法：对X线诊断、临床证实的30例绝经后脊柱原发性骨质疏松患者椎体压缩的CT表现进行回顾性分析。
Methods 30 postmenopausal cases with primary spinal osteoporosis and centrum compression, which confirmed by X-ray film and clinical data, were enrolled in this study.
方法：对X线诊断、临床证实的30例绝经后脊柱原发性骨质疏松患者椎体压缩的CT表现进行回顾性分析。
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