title: Sensitivity of a non-interferometric grating-based x-ray imaging system.
abstract: Grating-based x-ray imaging systems are of two categories: interferometric and non-interferometric. This work focuses on the angular sensitivity of the phase-stepping-based non-interferometric setup. First, a numerical model of the system is developed and verified with experimental results. Then, an existing system is optimized and verified by comparison with biological sample experiments. The results are also compared with those of a Talbot-Lau interferometer. Finally, an analytical formula of the system sensitivity is derived and limitations of the setup are discussed.
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China. Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, People's Republic of China.
authors.forename: Ran
authors.initials: R
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Chen
authors.forename: Weijun
authors.initials: W
authors.lastname: Peng
authors.forename: Ruimin
authors.initials: R
authors.lastname: Li
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D011859:Radiography / Q000295:instrumentation / Q000379:methods*