Phase-contrast Imaging Simulation Based on a Micro-CT System
GUI Jian-bao
ZOU Jing
RONG Jun-yan
HU Zhan-li
ZHANG Qi-yang
ZHENG Hai-rong
XIA Dan
摘要：Propagation-based phase-contrast imaging was simulated based on paraxial Fresnel-Kirchoff diffraction integral and spherical wave illumination. Under a developed micro-CT system parameters, the effects of focal-spot size and imaging geometry on phase-contrast imaging have been investigated using a 2-mm-thickness polystyrene edge phantom. An equivalent mono-energy was used to substitute the polychromatic spectrum of the micro-focus X-ray source. To consider effects of focal-spot size and detector resolution, the obtained phase-contrast image with an ideal point source was convolved with source intensity distribution and point spread function of detector. Simulations show reasonable influences of the two parameters which are in good agreement with experimental results.
机标关键词：point spread functionimaging geometrytwo parametersspherical wavepoint source
分类号：R318.6(医用一般科学)
论文发表日期：2016-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：6( 87-92 )
英文信息