Study on effect factors of image quality of polychromatic L-shell X-ray fluorescence computed tomography
CHEN Lizong， LIU Long
Shandong Engineering Technology Center for Material Failure Analysis and Safety Assessment， Shandong Analysis and Test Center， Qilu university of Technology (Shandong Academy of Sciences)， Jinan 250014， China
Abstract：X-ray fluorescence computed tomography (XFCT) is a potential experimental technique to investigate the spatial distribution of low element concentration in sample， which has great potential application in early diagnosis of cancer. In this investigation， polychromatic L-shell X-ray fluorescence computed tomography based on X-ray tube was built by Monte Carlo method. A four millimeter in diameter phantom containing a two millimeter in diameter insertion with platinum solutions was used in this investigation. Effect of incident particle number of each projection and projection number on XFCT image quality was investigated. The results indicate that the increase of incident particle number of each projection and projection number can improve the contrast-to-noise ratio of XFCT image. When the total number of incident particle was determined， decreasing projection number properly can improve the lowest detectable ability of L-shell X-ray fluorescence computed tomography. It provided a method to improve the detectable ability of polychromatic L-shell X-ray fluorescence computed tomography.
2018, Vol. 52 
