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phantom
相关语句
  体模
    CT Experimental Study on the Reference Phantom and SPN
    参考体模和孤立性肺结节CT诊断的初步研究
短句来源
    Experimental Study of A New Type of Chest CT Reference Phantom
    新型胸部CT参考体模的实验研究
短句来源
    Analysis on the phantom for CT low-contrast resolution
    CT低对比度分辨力性能检测体模分析
短句来源
    Development of the Liquid Phantom Equivalent to the Solid Phantom Made of Hydroxyapatite Used in QCT Bone Densitometry
    QCT骨密度测量羟磷灰石等效液体体模的研制
短句来源
    High-contrast resolution measurement of CT and phantom testing
    CT的空间分辨力测量技术及测试体模研究
短句来源
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  模型
    ~(18)F-FDG dual-head gamma camera coincidence imaging of chest phantom
    胸部模型~(18)F-FDG双探头符合显像实验研究
短句来源
    Influence of attenuation correction on imaging resolution and counts for dual-head SPECT coincidence imaging: a phantom study
    双探头SPECT符合线路衰减校正对图像分辨率及计数影响的模型研究
短句来源
    Heart phantom and clinical study of 99mTc-MIBI SPECT with 180°(LAO to RAO)data acquisition was camed out and compared with the full 360°rotation.
    借助心脏模型和临床研究,探讨了心肌断层显像180°采集方式的可行性,并与360°资料采集进行了比较。
短句来源
    METHODS Based on phantom test and animal study, PET imaging were performed on a normal volunteer and 7 patients 1 5 hours after intravenous injection of 370MBq of 18 F FDG.
    先进行模型试验和动物实验,然后对1例正常志愿者和7例患者进行18F脱氧葡萄糖(FDG)PET显像。
短句来源
    Materials and Methods: 12 soap models simulating the pulmonary nodules of different size and shape loaded on the Philips Pulmonary Phantom and 30 patients with pulmonary nodular lesions of different pathology were subjected to digital radiography (Siemens Polystar. Fluorospot H) and processed with 0% to 100% edge enhancement.
    材料和方法:使用SiemensPolystar·FluorospotHX线数字成像和处理系统分别对12个用Philips肺部Phantom叠加肥皂制作之不同大小及形态之结节模型以及30例不同病理之肺部结节性病灶,进行摄片及图像后处理,分别作0%~100%边缘增强。
短句来源
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  人体模型
    The results from the phantom measurements showed, (l) The effective field corresponding to an average-size patient is 25X 25cm2, and a method for estimating the effective field of human body is given.
    为了模拟辐射在人体内的作用,制成一具非均匀人体模型,经CT扫描证实其组织等效性良好。 体模剂量测定表明:(1)对于平均大小的病人,其对应的有效照射野为25×25cm~2,并讨论了估价人体有效照射野的方法;
短句来源
    In this work,the SMN-I anthropomorphic phantom was used to simulate patients and to estimat the radiation exposure of lens,thyroid gland and testis during CT examination according to hospital routine managements,The results show that the X-ray radiation doses received by the organs mentioned above are different in good and no pretection shelter,Therefore,during CT examination it's of great significence to take a good protective shelter for organs which are near the CT scanning areas.
    用SMN-I型仿真男性人体模型,按照医院常规要求模拟患者接受CT扫描检查,测定CT扫描时眼晶体、甲状腺、睾丸的屏蔽前、后X线辐射剂量。 结果:距离CT扫描部位较近的上述重要器官屏蔽前后X线辐射剂量差异显著。
短句来源
    In this paper, doses to the radiosensitive tissues/organs outside radiation field by 60 Co gamma rays or X rays (6 MV) from an electron linear acclerator were studied by simulation of the radiotherapeutic irradiation for nasopharyngeal carcinoma on a heterogenous tissue equivalent phantom.
    本文借助非均匀组织等效拟人体模型 ,模拟鼻咽癌放射治疗 ,研究了 60 Coγ射线和电子直线加速器产生的 6 MV X射线对野外组织器官的受照剂量。
短句来源
    The distribution of the absorbed dose rate along the eye axis had been measured using LiF TLD's in water-organic glass phantom.
    用LiF热释光片在水 -有机玻璃人体模型中作沿着眼睛中心轴的深度剂量分布的实验测量结果表明 ,测量距离大于约 5mm以后 ,计算值与实验值在误差范围内完全符合 ;
短句来源
  “phantom”译为未确定词的双语例句
    Study of solid calibration phantom for bone mineral density CT measurement
    骨密度定量CT测量用固体标准件的研究
短句来源
    The effect of high hepatic activity on the inferior wall in 99m Tc nitriles SPECT myocardial perfusion imaging:a phantom study
    ~(99m)Tc腈类心肌灌注断层显像时肝脏高放射性对下壁心肌的影响
短句来源
    CALCULATION OF THE ABSORBED DOSE FOR THE γ-RAY IN THE WATER PHANTOM BY MONTE CARLO METHOD
    用蒙特卡罗方法计算γ射线在水体膜中的吸收剂量(英文)
短句来源
    Comparison of dual-head coincidence imaging SUV with PET imaging SUV: a phantom study
    符合线路显像与PET显像中SUV的比较研究
短句来源
    Partial volume effect in PET images: phantom study
    PET显像部分容积效应的实验研究
短句来源
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  phantom
Stability lies in that the expected result of the game is observed precisely by each participant, be it real and phantom, that is, existing in the belief of other real or phantom participants.
      
The efficiency of the double scanning technique in suppressing the phantom images produced by transformed and rescattered pulses is shown in numerical and model experiments.
      
The efficiency of the double scanning technique in suppressing the phantom images produced by transformed and rescattered pulses is demonstrated in a numerical experiment.
      
It is shown that the quantum corrections and the density and exoticity of phantom energy or matter can be as small as is desired.
      
Passage of photons through wormholes and the influence of rotation on the amount of phantom matter around them
      
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The dosimetric considerations of using conventional cobalt-60 unit for total body irradiation (TBI) are presented. By extending the source-to-midplane distance (SMD) to 346 cm, a 92X98 cm2 rectangular field with diagonal dimension 134 cm was obtained. The results from the phantom measurements showed, (l) The effective field corresponding to an average-size patient is 25X 25cm2, and a method for estimating the effective field of human body is given. (2) The midplane doses are consistently higher than those...

The dosimetric considerations of using conventional cobalt-60 unit for total body irradiation (TBI) are presented. By extending the source-to-midplane distance (SMD) to 346 cm, a 92X98 cm2 rectangular field with diagonal dimension 134 cm was obtained. The results from the phantom measurements showed, (l) The effective field corresponding to an average-size patient is 25X 25cm2, and a method for estimating the effective field of human body is given. (2) The midplane doses are consistently higher than those of surfaces, but the dose ratio of midplane to surface decreases as the body thickness increases, and asignificant negative correlation is existed between the dose ratio and thickness, thus a linear regression line is fitted. (3) The anterior-posterior (AP) or AP+ bilateral irradiation will yield a more uniform dose distribution in the whole body than the bilateral irradiation. (4) The dose uniformity can apparently be improved by the tissue compensation, for which the technique is described.

探讨利用普通钴疗机进行全身照射的剂量学要点。通过将源-体中面距延长至346cm,得到98×92cm~2的近似正方形照射野,其对角线长134cm。为了模拟辐射在人体内的作用,制成一具非均匀人体模型,经CT扫描证实其组织等效性良好。体模剂量测定表明:(1)对于平均大小的病人,其对应的有效照射野为25×25cm~2,并讨论了估价人体有效照射野的方法;(2)体中面剂量始终大于体表剂量,但随着人体厚度增加,体中面/体表剂量比减小,两者之间呈明显负相关(r=-0.983,p<0.001),并拟合了回归曲线;(3)前后野(AP)或AP+左右侧野(RL)照射的剂量分布均匀性优于RL照射;(4)组织补偿可显著改善剂量分布均匀性,并叙述了组织补偿技术。

We presented the study of measuring 'myocaridal infarct size' (Mls)in cardiac phantom made by ourselves with SPECT. We used two methods, relative pixel quantification method (RPOM) and relative angle quantification method (RAQM), to size infarets(in %)from the short axis profiles of myocardial SPECT. There is an good correlation between the actual Mis and the Mis measured by RPQM and RAQM(r - 0. 978 and 0. 987, respectively, both p<0. 01 ). The actual Mis is different from the size by RPQM.but not different...

We presented the study of measuring 'myocaridal infarct size' (Mls)in cardiac phantom made by ourselves with SPECT. We used two methods, relative pixel quantification method (RPOM) and relative angle quantification method (RAQM), to size infarets(in %)from the short axis profiles of myocardial SPECT. There is an good correlation between the actual Mis and the Mis measured by RPQM and RAQM(r - 0. 978 and 0. 987, respectively, both p<0. 01 ). The actual Mis is different from the size by RPQM.but not different from the Mis by RAQM. RAQM is simpler than RPQM. It is concluded that RAQM is a valuable method for si/ing myocardial infarct clinically.

我们用SPECT在自制的心脏模型上进行了“心肌梗塞”大小的定量研究。在心肌的SPECT短轴断面图上,分别用面积相对定量法和角度相对定量法测定的“心肌梗塞”大小与实际大小均有较好的相关性,γ值分别为0.978和0.987(皆<0.01真)。用面积法测定的结果与实际大小之间差异有显著性(p>0.05),而角度法测定的结果与实际大小之间差异无显著性(p>0.05)。角度法还具有测定方法简单等优点,因此在临床应用中,它可能是计算心梗大小的有价值的方法。

Using a set of specielly designed phantoms and a measurement frame for semiconductor detector,a lot of measurements were performed for the total body irradiation prior to bone marrow transpla-ntation. On the basis of the measurements, the method and problems of transmission type in-vivodosimetry for determination of the dose to target volume and lung are discussed in the light of eightphysical anatomical parameters.

应用一套特殊设计的体模和半导体检测器格架对骨髓移植前的全身放射治疗作了大量的测量。根据测量并考虑8个物理解剖参数,讨论了确定靶区和肺剂量的透射型活体剂量学方法及问题。

 
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