英语释义

• an elementary particle with positive charge; interaction of a positron and an electron results in annihilation

片语

positron scanning正电子扫描

positron beam正电子束

Positron EmissionTomographyScanner正电子发射计算机断层扫描

positron confinement正电子约束

Positron Lottomr光子镭射

positron emission[核] 正电子发射

theory positron正子理论

positron diagnostics阳电子诊断

positron annihilation正电子湮没；阳电子湮没

positron scintigraphy正电子闪烁照相法

positron emission tomography[生物物理] 正电子成象术；正电子放射断层造影术

positron collision正电子碰撞

英汉例句

• the technology recently blossomed following passing a technical hurdle of altered positron movement in strong magnetic field thus affecting the resolution of pet images and attenuation correction.

  最近的技术蓬勃发展，以下通过在强磁场，从而影响pet图像分辨率和衰减校正领域的改变正电子的运动技术障碍。

• the result is that the electron shadow and the positron shadow are separated.

  结果将使得电子的阴影和正电子的阴影被分开。

• it was left to anderson to first publish the evidence for the existence of a positron and to scoop the credit for the discovery of the positron.

  而第一个发表正电子存在的证据并被冠以正电子发现人这一称号的的人则变成了安德森。

• and they did an imaging test called positron emission tomography or pet to test for brain function by looking to see how well the brain uses glucose or sugar.

  他们做了一个成像测试正电子发射断层或pet测试脑功能，看看大脑是如何使用好葡萄糖或糖。

• pet, or positron emission tomography, is an imaging study that allows doctors to evaluate the use of certain substances by the brain.

  即正电子放射断层摄影术，是一项成像研究，它能使医生评价大脑对某些物质的使用。

• in women with pmdd, studies have shown a correlation between self-reported emotional distress and levels of a serotonin precursor as measured by positron emission tomography (pet).[29]

  对患有经前不悦癥的妇女群体的研究显示，自述的情绪上的痛苦与正电子发射断层扫描仪（pet）测量的5-羟色胺前体水平二者之间具有一定的相关性。

• the scans, which used a technique called positron emission tomography (pet), were designed to monitor changes in the way the brain metabolised glucose, the fuel it needs to function.

  扫描利用了一种叫做正电子发射x射线层析照相术(pet)的技术。扫描用以监测脑中代谢葡萄糖（脑正常工作需要的营养物）的变化。

• twenty minutes into the call, clinicians injected a radioactive form of sugar into each person, then began imaging their brains with a positron emission topography machine.

  通话20分钟后，医生给每个人注射一种具有放射性的糖，然后利用正电子发射断层摄影仪对他们的大脑进行扫描。

• positron and electron (particle and anti-particle) can annihilate in collision turning into electromagnetic radiation.

  正电子和电子（粒子和反粒子）在对撞中会发生湮灭，并产生电磁辐射。

• positron emission tomography (pet) is an emerging modality in lung cancer staging.

  正电子放射断层造影术（pet）是新兴的适用于肺癌分期的检查方法。

• later, electron and positron pairs were actually produced in laboratory experiments.

  之后，电子与正电子对也最终在实验室中被制造出来。

• then the researchers nudged this cloud of cold, compressed antiprotons so it overlapped with a like-size positron cloud, where the two particles mated to form antihydrogen.

  然后研究人员推动这个冷却的云斑，并进一步把反质子压缩，以致可以用一个相似大小的中子云来与它相重叠，就在那时，两个粒子（反质子和中子）成对地形成了反氢原子。

• for decades, physicists at cern and elsewhere have been trying to overcome these limitations with antihydrogen, which consists of a single positron orbiting a single antiproton.

  几十年来，欧洲核子研究中心和其他地方的物理学家一直在想方设法克服反氢原子的这些局限。 反氢原子由一个正电子与一个反质子构成，正电子绕反质子运行。

• this creates, as it were, electron and positron shadows.

  这将产生电子和正电子的阴影带，正如月亮阴影带本身。

• these techniques include magnetic resonance imaging (mri), positron emission tomography (pet), and functional magnetic resonance imaging (fmri).

  这些技术包括磁共振成像（mri），正电子成象术 （pet）机能性磁共振成像（fmri）。

• the antihydrogen atoms are composed of a positron (an antimatter electron) orbiting an antiproton nucleus.

  反氢原子是正电子（所谓正电子就是反物质的电子）围绕着以反质子为核心，作轨道运行所形成。

• lisa mosconi and colleagues at the new york university school of medicine used positron emission tomography, or pet, scans to look at the brains of 53 normal elderly people.

  美国纽约大学医学院的莉萨·墨斯科尼和其同事使用正电子发射断层成像(positron emissiontomography,pet)技术，对53名正常的中老年人进行了脑部扫描。