positron

noun

1. 正电子；阳电子
   a particle in an atom which has the same mass as an electron and an equal but positive charge

1. Electron positron pair creation
   电子正电子对产生
2. The layout of HIRFL heavy ion cancer therapy terminal and the PET ( Positron Emission Tomography) project were described simply.
   文章简单描述HIRFL重离子肿瘤治疗装置布局和PET（正电子断层影像）的总体设计。
3. This is the mathematical basis of computed tomography and positron emission tomography.
   这是计算机层析成像和正电子层析成像的数学基础。
4. Partial volume effect ( PVE) and their influence factors for positron emission tomography ( PET) were investigated with computer simulation and experiments.
   用模拟实验研究了正电子发射断层扫描（PET）部分容积效应与相关影响因素间的关系。
5. The microscopic mechanism of irradiation damage of Al film reflector is studied by the slow positron annihilation technique and X-ray diffraction.
   用慢正电子湮没等分析技术研究了辐照损伤的微观机制。
6. Using positron emission tomography ( PET) scans, the researchers also observed differences in the areas of the brain that processed these olfactory experiences.
   研究者们采用正电子断层扫描（PET）观察了不同人群的大脑中处理这些嗅觉信号区域间的差异。
7. The researchers systematically assessed the effect of zolpidem on motor and cognitive function and explored its effect on brain activity using positron emission tomography ( PET) scans.
   研究者系统的评估了唑吡坦在运动和认知功能方面的作用，并用正电子体层扫描探究其在脑活性方面的作用。
8. Objective To study the clinical values of positron emission tomography ( PET) in pre-term and term newborn infants through observing neonatal brain by18F-fluorodeoxyglucose ( 18F-FDG) PET.
   目的对早产儿和足月新生儿进行18氟脱氧葡萄糖（18F-FDG）正电子发射断层显像（PET）脑显像观察，为PET在新生儿的应用进行初步探讨。
9. Positron Study on WO_x Gas Sensitivity Materials and ZnO/ Metal/ ZnO Multilayer Films
   WOx气敏薄膜与ZnO/Metal/ZnO金属介质多层膜的正电子研究
10. The antielectron, or positron, was discovered in 1932.
    反电子或正电子，是在1932年被发现。
11. Progression of tumors pre-clinical study, clinical diagnosis and therapy follow-up using combined multiple positron tracers PET imaging
    多种正电子示踪剂PET联合显像在肿瘤基础研究、临床诊断和疗效监测中的应用进展
12. Research Progress and Clinical Application of Cardiac Positron Emission Tomography Perfusion Tracers
    正电子心肌灌注显像剂的临床应用及研究进展
13. Functional neuroimaging technologies like single photon emission computerized tomography, or spect, and positron emission tomography, or pet, now enable scientists to monitor changes in brain activity.
    如今，诸如单光子发射计算机扫描断层成像（spect）及正电子发射型断层成像（pet）等功能性大脑成像技术使科学家能够监测大脑活动的变化。
14. Positron emission tomography of tinnitus-related brain areas Features and Applications of Positron Emission Tomography
    耳鸣相关脑区的正电子发射断层成像正电子发射断层照相（PET）的特色与应用
15. Application of penalized least-squares algorithm in positron emission tomography image reconstruction based ordered subsets
    正电子发射断层图像重建中基于有序子集惩罚最小二乘算法的应用
16. Positron emission tomography ( PET) is an imaging technique that combines a radioactive tracer with a molecule.
    正电子发射断层成像（PET）是一种结合单一分子放射示踪的成像技术。
17. Positron Emission Tomography and PET Image Reconstruction
    正电子断层扫描仪与PET图像重建概述
18. The automatic data acquisition and processing for positron annihilation lifetime spectra and Doppler broadening spectra
    正电子湮没寿命谱和多普勒展宽谱的自动获取和处理技术
19. According to the values of the life time of positron annihilation, the model of positron annihilation in the rare-earth polyacetylene was proposed.
    根据寿命值和强度提出了正电子在稀土聚乙炔中的湮没模型。
20. The periodicity of positron annihilation parameter is related to periodic change of lattic distortion and crystal defect.
    正电子湮没参数的周期性，与点阵畸变和晶体缺陷的周期性变化有关。
21. The positron is an antielectron.
    正电子就是反电子。
22. Features and Applications of Positron Emission Tomography
    正电子发射断层照相（PET）的特色与应用
23. Pulmonary diseases; Diffusion-weighted imaging; Positron emission tomography;
    肺部病变；扩散加权成像；正电子发射体层摄影术；
24. The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.
    该核素图将电子、正电子、反质子、反中子和光子收录在内，完美地表现了质量和电荷的对称性。
25. Combined positron emission tomography and computed tomography ( PET/ CT) is currently widely used in the clinical diagnosis of cancer to provide functional and morphological imaging.
    正电子发射断层扫描及计算机断层扫描相结合的产物-PET/CT，目前已广泛应用于肿瘤的临床诊断，能够提供功能与解剖相结合的影像资料。
26. This phenomenon occurs whenever the interaction is so strong as to cause transitions from electron states to positron states.
    这现象发生在交互作用如此强以致引起从电子态到正电子转变的任何时候。
27. These findings support several other studies using functional magnetic resonance imaging and positron emission tomography, both of which gauge brain activity by measuring blood flow.
    这些发现支持了几种应用功能磁共振成像和正电子放射X断层摄影术的研究（它们通过测量血流来检测大脑活性）。
28. The transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus.
    当光子近距离的经过原子核时一个伽马射线光子转换为一个正电子和一个负电子的过程。
29. Antimatter/ matter reactions have practical applications in medical imaging, see Positron emission tomography ( PET).
    反物质/物质反应在医学成像有实际应用，注意正电子放射断层摄影术（PET）。

noun

1. an elementary particle with positive charge

   Synonym:    antielectron