positron

英 [ˈpɒzɪtrɒn]

美 [ˈpɑːzɪtrɑːn]

n.  正电子; 阳电子

复数：positrons　

化学

BNC.44376 / COCA.22917

牛津词典

noun

• 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

英英释义

noun

• an elementary particle with positive charge
  Synonym:antielectron

双语例句

• 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。
• 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）。
• 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
• 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。
• 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。
• 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
• Positron Emission Tomography and PET Image Reconstruction
  正电子断层扫描仪与PET图像重建概述
• 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。
• The positron is an antielectron.
  正电子就是反电子。
• 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。