Performance evaluation of CsI screens for X-ray imaging
文献类型：期刊论文
| 作者 | Zhao, BZ; Qin, XB; Feng, ZD; Wei, CF; Chen, Y; Wang, BY; Wei, L |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2014 |
| 卷号 | 38期号:11页码:116003 |
| 关键词 | microcolumnar CsI:Tl film scintillation screen DQE |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/38/11/116003 |
| 文献子类 | Article |
| 英文摘要 | CsI film has been one of the most extensively used scintillators for indirect X-ray imaging because of its needle-like micro-structure. The purpose of this paper is to investigate the imaging performance of CsI screen as a function of thickness and radiation quality. Four multilayer scintillation screens with microcolumnar CsI:Tl film (thicknesses of 50 mu m, 100 mu m, 200 mu m and 300 mu m) included were prepared and coupled to an optical imaging sensor. The modulation transfer function (MTF), normalized noise power spectrum (NNPS) and detective quantum efficiency (DQE) of these screens were evaluated based on the standard IEC 62220-1, and the results indicated that, in the medium spatial frequency range (1-6 lp/mm), the MTF of CsI screens with the same thickness was lower when the incident X-ray photon energy was higher, possibly owing to scattering and K-fluorescence re-absorption effects. The NNPS in the higher spatial frequency range (above 8 lp/mm) is dominated by stochastic noise while the entrance surface air Kerma (ESAK) decreases. For 100 mu m, 200 mu m and 300 mu m thick CsI screens, the DQE under RQA7 and RQA9 is lower than that under RQA3 and RQA5 due to low absorption efficiency. |
| 电子版国际标准刊号 | 2058-6132 |
| WOS关键词 | QUALITY ; SYSTEM ; DETECTORS ; CSI(TL) |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000344911400006 |
| 源URL | [https://ir.ihep.ac.cn/handle/311005/304269]  |
| 专题 | 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhao, BZ,Qin, XB,Feng, ZD,et al. Performance evaluation of CsI screens for X-ray imaging[J]. CHINESE PHYSICS C,2014,38(11):116003. |
| APA | Zhao, BZ.,Qin, XB.,Feng, ZD.,Wei, CF.,Chen, Y.,...&Wei, L.(2014).Performance evaluation of CsI screens for X-ray imaging.CHINESE PHYSICS C,38(11),116003. |
| MLA | Zhao, BZ,et al."Performance evaluation of CsI screens for X-ray imaging".CHINESE PHYSICS C 38.11(2014):116003. |
入库方式： OAI收割
来源：高能物理研究所
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