【摘要】 目的:在锥形束CT成像系统中,对投影数据进行适当的散射校正是一步重要的数据校正。方法:本文对目前关于锥形束CT图像散射的软件校正方法做了综述,其中包括了卷积法、反卷积法、蒙特卡罗模拟法以及基于散射校正板(beam stop array,BSA)的散射校正法,并对各种方法进行了比较和讨论。结论:基于BSA的散射校正方法对三维锥形束CT系统进行散射校正是一种实用有效的校正方法。更多还原

【Abstract】 Objective: To calibrate the projection data in Cone-Beam CT imaging system is of great significance.Methods: Four main software methods for X-ray scatter correction used in Cone-Beam CT system are briefly introduced and compared, including a convolution algorithm, a deconvolution algorithm, Monte Carlo simulations and a BSA-based scatter correction technique.Conclusions: The BSA-based scatter correction algorithm is practical and effective to reduce and correct x-ray scatter for a CBCT imaging task.更多还原