Investigation of different MicroCT scanner configurations by GEANT4 simulations

被引：0
|
作者：
Khodaverdi, M [1 ]
Chaziioannou, AF [1 ]
Weber, S [1 ]
Ziemons, K [1 ]
Halling, H [1 ]
Pietrzyk, U [1 ]
机构：
[1] Forschungszentrum Julich, Cent Lab Elect, D-52425 Julich, Germany
来源：
2003 IEEE NUCLEAR SCIENCE SYMPOSIUM, CONFERENCE RECORD, VOLS 1-5 | 2004年
关键词：
D O I：
10.1109/NSSMIC.2003.1352513
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
This study has been performed to design the combination of the new ClearPET(TM) (ClearPET is a trademark of the Crystal Clear Collaboration), a small animal Positron Emission Tomography (PET) system, with a micro-Computed Tomography (microCT) scanner. The properties of different microCT systems have been determined by simulations based on GEANT4. We will demonstrate the influence of the detector material and the x-ray spectrum on the obtained contrast. Four different detector materials (Selenium, Cadmium Zinc Telluride, Cesium Iodide and Gadolinium Oxysulflde) and two x-ray spectra (a molybdenum and a tungsten source) have been considered. The spectra have also been modified by aluminum filters of varying thickness. The contrast between different tissue types (water, air, brain, bone and fat) has been simulated by using a suitable phantom. The results indicate the possibility to improve the image contrast in microCT by an optimized combination of the x-ray source and detector material.
引用
收藏
页码：2989 / 2993
页数：5
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