应用于骨密度仪的锥束X射线散射校正研究

Study on Cone Beam X-Ray Scattering Correction Applied to Bone Densitometer

摘要: 为解决骨密度仪中锥束X射线的散射问题，作者设计了一个基于蒙特卡洛方法的散射校正算法。本文首先介绍了该算法的数学原理与公式推导过程，并利用蒙特卡洛软件工具包模拟得到仿真数据。随后将得到的测量图像反卷积散射核函数得到原始图像，达到散射校正的效果。该算法不需要额外的硬件设备，同时计算简单，可操作性强。最后的实验表明该算法散射校正效果良好，具有较强的实用性。

Abstract: To solve the cone beam X-ray scattering problem in the bone mineral density instrument, a Monte Carlo method-based scatter correction algorithm was designed in this paper. First, this article introduced the mathematical principle and formula derivation process of the algorithm, and used Monte Carlo software toolkit simulation to obtain simulation data. Then, the measured image deconvolution scattering kernel function is used to obtain the original image and achieve the effect of scattering correction. The algorithm does not need additional hardware devices, at the same time; it has the advantages of simple calculation and strong operability. Experimental results manifest that this system is accurate, useful and high efficient.