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- two photon emission 双光子发射
- SPECT: Single Photon Emission Computer Tomgraphy. 单光子发射计算机断层扫描仪。
- At present,usual examinations for this disease are CT,MRI and single photon emission computed tomography(SPECT),etc. 目前,该病常用的检查方法有CT扫描、MRI成像及单光子发射型计算机体层摄影等方法。
- Methods The rCBF of 22 unmedicated patients with OCD was measured with single photon emission tomography (SPECT). 方法 采用单光子发射计算机扫描 (SPECT)技术 ,对未服药的 2 2例强迫症患者于静息及症状诱发状态下行局部脑血流 (rCBF)动态显像研究。
- The ultraweak photon emission was observed from plant seedling at stage of germination by using PIAS. 摘要采用光子计数成像系统(IAS)植物幼苗萌发过程的超弱发光进行观察。
- The Exact Electromagnetic Field Description of Photon Emission, Absorption, and Radiation Pattern. II. 关于光子辐射、吸收及辐射图形的精确电磁场描述II.
- Closely related to PET is single- photon emission computed tomography, or SPECT. 与正电子发射X射线摄影技术密切相关的是单光子发射计算机化成像（SPECT）。
- The principle and image properties of single photon emission computed tomography are introduced. 探讨了单光子发射型计算机断层成像的原理与图像特点.
- We think with the appropriate design of structure, anthracenederivatives can be used as fine two photon absorption materials. 我们认为经过恰当结构设计合成出的蒽基衍生物可能成为一类优良的双光子材料。
- The ischemia region of the heart decreased through the single photon emission computed tomographic(SPECT) test. 单光子发射计算机体层摄影术(SPECT)检查心肌缺血区缩小。
- Two photons are created in the decay of the neutral pion. 双光子是在中性兀介子衰变中产生的。
- The characteristics of the biological system can be accumulated by fluorescence, chemiluminescence, or ultra-weak photon emission of the creature. 通过对荧光信号、化学发光信号或超微弱光子辐射的探测,可以了解生物体内在的特点。
- Both the red and green emissions of Er 3+ in oxyfluoride host are due to two photon process. The green emission in ZBLAN is due to two photon process, and the red emission is due to two and three photon processes. 分析了两种基质中Er3+ 的上转换发光机制 ,氟氧化物基质中Er3+ 离子红绿光发射均为双光子过程 ,ZBLAN基质中Er3+ 离子绿光发射为双光子过程 ,而红光发射为双光子和三光子混合过程。
- Ultraweak photon emission (UPE) from biological syste ms is a kind of spontaneous phenomenon in nature and occurs in all living organi sms. 花生种子萌发过程中超弱发光强度变化呈双峰曲线，分别对应于种子萌发早期事件的吸涨和呼吸激增；
- The two photons go off together as coherent radiation. 这两个光子一起发射出去，形成相干辐射。
- The statistic characteristics of single photon emission in single semiconductor quantum dot with pulse excitation have been investigated. 研究了脉冲激发下单个半导体量子点中单光子发射的统计特性.
- The one photon and two photon excited UV fluorescence spectra of 1, 10 phenanthroline and [bis(1, 10 phenanthroline)lanthanum] nitrate are observed in the methanol solution. 测量了1，10-二氮杂菲和硝酸[二-（1，10-二氮杂菲）合镧]甲醇溶液的单光子和双光子激发紫外荧光谱。
- Objective To evaluate the distributing rule of skeleton metastasis in patients with prostate cancer using SPECT(Single Photon Emission Computed Tomography). 目的通过全身骨核素显像,探讨前列腺癌转移病灶在全身骨的分布情况。
- It showed that PIAS could objectively display the spontaneous ultraweak photon, and this results provided experimental basis for research mechanism of ultraweak photon emission. 光子成像系统可客观地比较生物自发超弱发光，为进一步研究超弱发光机理提供实验基础。
- "The axion is so light that it doesn't decay into two photons in free space. " “轴子很轻，它不会在自由空间中衰变成两个光子。
