Oxygen sensing ability of positronium atom for tumor hypoxia imaging
Oxygen sensing ability of positronium atom for tumor hypoxia imaging
复制标题
正电子原子的氧传感能力用于肿瘤缺氧成像
DOI:
10.1038/s42005-020-00440-z
复制
发表时间:
2020
影响因子:
5.5
通讯作者:
Yamaya Taiga
中科院分区:
文献类型:
--
作者:
Shibuya Kengo;Saito Haruo;Nishikido Fumihiko;Takahashi Miwako;Yamaya Taiga
Positronium (Ps), a hydrogen-like atom consisting of a positron and an electron, is efficiently formed in the human body during positron emission tomography (PET) examination, and its decay rate into gamma-ray photons is significantly influenced by the chemical environment, especially the dissolved oxygen concentration (pO2) due to the unpaired electrons. However, the functionality of PET has been underestimated by neglecting the specific information provided by Ps. By comparing the decay rates in O2-, N2-, and air-saturated waters, here we show that Ps probes the absolute value of pO2with a good linearity and a resolution better than 10 mmHg. This is a sufficient sensitivity for discriminating a hypoxic region in a tumor at approximately 6 mmHg from healthy tissues at approximately 40 mmHg. This method depends only on the fundamental properties of Ps and is independent of specific radiopharmaceuticals. The applications of Ps spin states and reactions will greatly enhance PET functionalities in the next decade.
登录
查看更多内容
影响因子:
--
作者:
R. A. Ferrell
通讯作者:
R. A. Ferrell
影响因子:
10.6
作者:
K. Kacperski;N. Spyrou;F. Smith
通讯作者:
F. Smith
DOI:
--
发表时间:
1949
期刊:
影响因子:
--
作者:
A. Ore;J. L. Powell
通讯作者:
J. L. Powell
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Y. Kataoka;S. Asai;T. Kobayashi
通讯作者:
T. Kobayashi
影响因子:
3.8
作者:
Harpen, MD
通讯作者:
Harpen, MD