Ultra-high resolution of radiocesium distribution detection based on Cherenkov light imaging
Ultra-high resolution of radiocesium distribution detection based on Cherenkov light imaging
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基于切伦科夫光成像的超高分辨率放射性铯分布检测
DOI：
10.1016/j.nima.2014.12.090
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发表时间：
2015
影响因子：
1.4
通讯作者：
S. Fujimaki
中科院分区：
文献类型：
--
作者：
S. Yamamoto;Y. Ogata;N. Kawachi;N. Suzui;Yong;S. Fujimaki
福岛核灾难后，放射性铯污染成为一个严重的科学问题，其对植物的影响的研究增加。在此类植物研究中，需要在不接触受试者的情况下获得放射性铯的高分辨率图像。β放射性核素的切伦科夫光成像具有固有的高分辨率，在植物研究中有很好的应用前景。由于137 Cs和134 Cs发射β粒子，切伦科夫光成像将有助于放射性铯分布的成像。因此，我们开发并测试了切伦科夫光成像系统。我们使用高灵敏度的冷却电荷耦合器件（CCD）相机（滨松光子学，ORCA 2-ER）的成像切伦科夫光从137 Cs。将明亮的透镜（氙，F值：0.95，透镜直径：25 mm）安装在相机上并放置在黑匣子中。在100 μ m ~（137）Cs点源条件下，获得了220 μm的空间分辨率。使用直径为1 mm的320 kBq 137 Cs点源，源在2 s内被区分。我们成功地获得了植物根部在~（137）Cs溶液中浸泡后的切伦科夫光图像、含放射性铯的样品图像以及线条和字符体模图像。切伦科夫光成像技术是一种很有希望的非接触式高分辨率放射性铯分布成像技术。
After the nuclear disaster in Fukushima, radiocesium contamination became a serious scientific concern and research of its effects on plants increased. In such plant studies, high resolution images of radiocesium are required without contacting the subjects. Cherenkov light imaging of beta radionuclides has inherently high resolution and is promising for plant research. Since137Cs and134Cs emit beta particles, Cherenkov light imaging will be useful for the imaging of radiocesium distribution. Consequently, we developed and tested a Cherenkov light imaging system. We used a high sensitivity cooled charge coupled device (CCD) camera (Hamamatsu Photonics, ORCA2-ER) for imaging Cherenkov light from137Cs. A bright lens (Xenon, F-number: 0.95, lens diameter: 25 mm) was mounted on the camera and placed in a black box. With a 100-μm137Cs point source, we obtained 220-μm spatial resolution in the Cherenkov light image. With a 1-mm diameter, 320-kBq137Cs point source, the source was distinguished within 2-s. We successfully obtained Cherenkov light images of a plant whose root was dipped in a137Cs solution, radiocesium-containing samples as well as line and character phantom images with our imaging system. Cherenkov light imaging is promising for the high resolution imaging of radiocesium distribution without contacting the subject.
DOI：
10.2967/jnumed.110.076521
发表时间：
2010-07
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
--
作者：
Ruggiero A;Holland JP;Lewis JS;Grimm J
通讯作者：
Grimm J
DOI：
10.1073/pnas.1111724108
发表时间：
2011-12-06
影响因子：
11.1
作者：
Kinoshita, Norikazu;Sueki, Keisuke;Yamagata, Takeyasu
通讯作者：
Yamagata, Takeyasu