[生物物理] 正電子成象術；正電子放射斷層造影術
PET, or positron emission tomography, is an imaging study that allows doctors to evaluate the use of certain substances by the brain.
即正電子放射斷層攝影術，是一項成像研究，它能使醫生評價大腦對某些物質的使用。
Many methods have been considered to suppress noise effects in reconstructed images in positron emission tomography(PET) image reconstruction.
在正電子發射成像（PET）中，很多方法被用來抑制重建圖像中的噪聲效果，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，最近研究人員利用現代PET（正電子發射斷層）掃描，檢測那些積極吸收糖類的組織，以尋找成人棕色脂肪的沉積。
Objective To investigate the relationship between positron emission tomography (PET) and cognitive dysfunction in patients with multiple sclerosis (MS).
目的探讨正電子發射體層成像（PET）與多發性硬化（MS）患者認知功能障礙的關系。
Molecular imaging with positron emission tomography (PET) is an important field of molecular imaging.
正電子發射斷層（PET）分子影像學是分子影像學的重要内容。
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：以正常人為測試對象，應用正電子發射計算機斷層成像（PET）評定貼敷式局部亞低溫對人腦葡萄糖代謝的影響。
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.
他們做了一個成像測試正電子發射斷層或PET測試腦功能，看看大腦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.
在患者安靜狀态下和在使用潘生丁時，用正電子發射斷層攝影測量其特殊微血管血流速。
Positron Emission Tomography (PET) has become a powerful tool for scientific stu***s.
正電子放射層析技術（PET）是科學研究強有力的工具。
In positron emission tomography ( PET) image reconstruction, regularization methods are usually considered to suppress noise effects in reconstructed images.
在正電子發射成像（PET）中，很多方法被用來抑制重建圖像中的噪聲效果，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.
目的對早産兒和足月新生兒進行18氟脫氧葡萄糖（18F-FDG）正電子發射斷層顯像（PET）腦顯像觀察，為PET在新生兒的應用進行初步探讨。
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.
掃描利用了一種叫做正電子發射X射線層析照相術(PET)的技術。掃描用以監測腦中代謝葡萄糖（腦正常工作需要的營養物）的變化。
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]
對患有經前不悅症的婦女群體的研究顯示，自述的情緒上的痛苦與正電子發射斷層掃描儀（PET）測量的5-羟色胺前體水平二者之間具有一定的相關性。
Positron emission tomography (PET) is an imaging technique that combines a radioactive tracer with a molecule.
斷層 成像（PET）是一種結合單一分子放射示蹤的成像技術。
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，正電子斷層掃描（PET）研究表明，一個人要達到高潮，其必要的條件是放下“所有的恐懼和焦慮”。
Objective To investigate the value of positron emission tomography (PET) in testing the treatment efficacy and the role of predictive evaluation in malignant gliomas.
目的探讨正電子發射斷層掃描（PET）在惡性膠質瘤治療後療效觀察及預後評價中的作用。
Luc De Nil, of the University of Toronto, has been poring over stutterers’ brains using positron emission tomography and functional magnetic resonance imaging.
多倫多大學的盧克.德.尼爾已經用正電子發射斷層掃描和功能性磁共振成像仔細研究了口吃者的大腦。
Objective To evaluate the clinical value of positron emission tomography-CT(PET-CT)in diagnosing peritoneal metastasis of gastric cancer.
目的評價正電子發射體層攝影-CT（PET-CT）診斷胃癌腹膜轉移的價值。
This paper describes the value of positron emission tomography(PET) in diagnosis and staging of lung cancer.
本文介紹正電子發射斷層顯像（PET）在肺癌診斷和分期中的應用概況，肯定了其臨床應用價值。
Positron emission tomography study of regional cerebral metabolism during general anesthesia with xenon in humans.
氙氣全身麻醉時對于人類局部區域腦代謝的正電子掃描圖像研究。
Using positron emission tomography (PET) scans, the researchers also observed differences in the areas of the brain that processed these olfactory experiences.
研究者們采用正電子斷層掃描（PET）觀察了不同人群的大腦中處理這些嗅覺信號區域間的差異。
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.
正電子發射斷層掃描及計算機斷層掃描相結合的産物-PET/CT，目前已廣泛應用于腫瘤的臨床診斷，能夠提供功能與解剖相結合的影像資料。
Partial volume effect(PVE) and their influence factors for positron emission tomography(PET) were investigated with computer simulation and experiments.
用模拟實驗研究了正電子發射斷層掃描（PET）部分容積效應與相關影響因素間的關系。
The layout of HIRFL heavy ion cancer therapy terminal and the PET (Positron Emission Tomography) project were described simply.
文章簡單描述HIRFL重離子腫瘤治療裝置布局和PET（正電子斷層影像）的總體設計。
In positron emission tomography(PET) image reconstruction, regularization methods are used to suppress noise effects on reconstructed images.
在正電子發射成像（PET）中，很多方法被用來抑制重建圖像中的噪聲效果，其中。
正電子發射斷層掃描（Positron Emission Tomography，簡稱PET）是一種基于核醫學原理的醫學影像技術。它通過檢測體内放射性示蹤劑釋放的正電子與電子湮滅時産生的伽馬射線，構建三維圖像以顯示器官或組織的代謝活動（來源：美國國家癌症研究所，www.cancer.gov）。該技術由以下三個核心部分組成：
正電子示蹤劑
患者需注射含放射性同位素（如¹⁸F-FDG）的标記化合物。這類同位素衰變時會釋放正電子，正電子與周圍電子相遇後發生湮滅反應，産生一對方向相反的511 keV伽馬光子（來源：Mayo Clinic，www.mayoclinic.org）。
環形探測器與圖像重建
設備中的閃爍晶體探測器會捕獲伽馬光子信號，通過符合時間窗技術（約10⁻⁹秒）确定湮滅事件的位置。計算機将收集的百萬級信號重建為橫斷面圖像，并支持三維可視化（來源：RadiologyInfo，www.radiologyinfo.org）。
代謝功能成像優勢
與CT、MRI等解剖成像不同，PET可定量顯示細胞代謝水平，例如腫瘤細胞的異常葡萄糖攝取、腦神經突觸活動或心肌血流情況。這種功能成像特性使其在癌症分期（靈敏度達85-90%）、阿爾茨海默病早期診斷和冠心病評估中具有不可替代性。
"Positron Emission Tomography"（簡稱PET）是一種醫學影像技術，中文譯為正電子發射斷層顯像。以下從術語分解、原理和應用三個方面進行解釋：
如需進一步了解PET/CT等擴展技術，的詳細說明。
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