Open AccessNoise analysis of hard X-ray differential phasecontrast imaging
Author(s) -
Huang Jianheng,
Yang Du,
Lei Yaohu,
Xin Liu,
Jr-Hung Guo,
Hanben Niu
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.168702
Subject(s) - visibility , optics , moiré pattern , scattering , noise (video) , contrast (vision) , physics , phase contrast imaging , quality (philosophy) , quantum noise , standard deviation , phase (matter) , contrast to noise ratio , intensity (physics) , image quality , square (algebra) , noise reduction , refractive index , quantum , computer science , phase contrast microscopy , statistics , image (mathematics) , mathematics , computer vision , acoustics , quantum mechanics , geometry
Quantum noise is an important factor influencing the quality of the images obtained by X-ray phase contrast imaging because it induces a random fluctuation on the intensity. In this paper, a method is reported to analyze the noise characteristics of hard X-ray differential phase contrast imaging, and the relationship between the quantum noise and images is determined by numerical simulation. The results show that the mean square deviations of the refractive and scattering images are inversely proportional to the visibility of moir fringe. That is to say, the higher visibility of moir fringe leads to the lower mean square deviations of the refractive and scattering images. Therefore, in the case of ensuring an enough X-ray detection efficiency, the improvement in the visibility of moir fringe will be beneficial to obtaining high-quality phase contrast images and the effective reduction of X-ray exposure dose.