[生物物理] 正电子成象术；正电子放射断层造影术
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。
Many methods have been considered to suppress noise effects in reconstructed images in positron emission tomography(PET) image reconstruction.
在正电子发射成像（PET）中，很多方法被用来抑制重建图像中的噪声效果，其中。
Recently, however, researchers have used modern PET (positron emission tomography) scanners -- which detect tissue that is actively absorbing sugar -- to search for deposits of brown fat in *****s.
然而，最近研究人员利用现代PET（正电子发射断层）扫描，检测那些积极吸收糖类的组织，以寻找成人棕色脂肪的沉积。
Objective To investigate the relationship between positron emission tomography (PET) and cognitive dysfunction in patients with multiple sclerosis (MS).
目的探讨正电子发射体层成像（PET）与多发性硬化（MS）患者认知功能障碍的关系。
Molecular imaging with positron emission tomography (PET) is an important field of molecular imaging.
正电子发射断层（PET）分子影像学是分子影像学的重要内容。
AIM: To evaluate the effect of local mild hypothermia on glucose metabolism in human brain of health persons with positron emission tomography(PET).
目的：以正常人为测试对象，应用正电子发射计算机断层成像（PET）评定贴敷式局部亚低温对人脑葡萄糖代谢的影响。
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。
Positron emission tomography imaging was performed to measure specific microvascular blood flow at rest and during pharmacological vasodilation by IV dipyridamole.
在患者安静状态下和在使用潘生丁时，用正电子发射断层摄影测量其特殊微血管血流速。
Positron Emission Tomography (PET) has become a powerful tool for scientific stu***s.
正电子放射层析技术（PET）是科学研究强有力的工具。
In positron emission tomography ( PET) image reconstruction, regularization methods are usually considered to suppress noise effects in reconstructed images.
在正电子发射成像（PET）中，很多方法被用来抑制重建图像中的噪声效果，其中。
Objective To study the clinical values of positron emission tomography(PET)in pre-term and term newborn infants through observing neonatal brain by 18F-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。
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。
In women with PMDD, stu***s have shown a correlation between self-reported emotional distress and levels of a serotonin precursor as measured by Positron emission tomography (PET).[29]
对患有经前不悦症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。
Positron emission tomography (PET) is an imaging technique that combines a radioactive tracer with a molecule.
断层 成像（PET）是一种结合单一分子放射示踪的成像技术。
Secondly, research using positron emission tomography (PET) scans has shown that in order for a person to reach orgasm, a primary requirement is to let go of “all fear and anxiety.”
第二，正电子断层扫描（PET）研究表明，一个人要达到高潮，其必要的条件是放下“所有的恐惧和焦虑”。
Objective To investigate the value of positron emission tomography (PET) in testing the treatment efficacy and the role of predictive evaluation in malignant gliomas.
目的探讨正电子发射断层扫描（PET）在恶性胶质瘤治疗后疗效观察及预后评价中的作用。
Luc De Nil, of the University of Toronto, has been poring over stutterers’ brains using positron emission tomography and functional magnetic resonance imaging.
多伦多大学的卢克.德.尼尔已经用正电子发射断层扫描和功能性磁共振成像仔细研究了口吃者的大脑。
Objective To evaluate the clinical value of positron emission tomography-CT(PET-CT)in diagnosing peritoneal metastasis of gastric cancer.
目的评价正电子发射体层摄影-CT（PET-CT）诊断胃癌腹膜转移的价值。
This paper describes the value of positron emission tomography(PET) in diagnosis and staging of lung cancer.
本文介绍正电子发射断层显像（PET）在肺癌诊断和分期中的应用概况，肯定了其临床应用价值。
Positron emission tomography study of regional cerebral metabolism during general anesthesia with xenon in humans.
氙气全身麻醉时对于人类局部区域脑代谢的正电子扫描图像研究。
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。
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。
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。
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。
In positron emission tomography(PET) image reconstruction, regularization methods are used to suppress noise effects on reconstructed images.
在正电子发射成像（PET）中，很多方法被用来抑制重建图像中的噪声效果，其中。
正电子发射断层扫描（Positron Emission Tomography，简称PET）是一种基于核医学原理的医学影像技术。它通过检测体内放射性示踪剂释放的正电子与电子湮灭时产生的伽马射线，构建三维图像以显示器官或组织的代谢活动（来源：美国国家癌症研究所，www.cancer.gov）。该技术由以下三个核心部分组成：
正电子示踪剂
患者需注射含放射性同位素（如¹⁸F-FDG）的标记化合物。这类同位素衰变时会释放正电子，正电子与周围电子相遇后发生湮灭反应，产生一对方向相反的511 keV伽马光子（来源：Mayo Clinic，www.mayoclinic.org）。
环形探测器与图像重建
设备中的闪烁晶体探测器会捕获伽马光子信号，通过符合时间窗技术（约10⁻⁹秒）确定湮灭事件的位置。计算机将收集的百万级信号重建为横断面图像，并支持三维可视化（来源：RadiologyInfo，www.radiologyinfo.org）。
代谢功能成像优势
与CT、MRI等解剖成像不同，PET可定量显示细胞代谢水平，例如肿瘤细胞的异常葡萄糖摄取、脑神经突触活动或心肌血流情况。这种功能成像特性使其在癌症分期（灵敏度达85-90%）、阿尔茨海默病早期诊断和冠心病评估中具有不可替代性。
"Positron Emission Tomography"（简称PET）是一种医学影像技术，中文译为正电子发射断层显像。以下从术语分解、原理和应用三个方面进行解释：
如需进一步了解PET/CT等扩展技术，的详细说明。
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