【摘要】 针对STL样本基元,根据锥束CT仿真投影的特点,研究了一套基于八叉树的锥束CT仿真投影快速计算方法,并采用SIMD技术对投影计算中的关键部分进行并行计算,进一步提高了生成仿真投影图象的速度。实验结果表明,在保证投影图象精度的前提下,该方法较之于UG样本投影计算有65～90倍左右的加速比,极大地提高了锥束CT仿真投影的计算速度,增强了仿真系统的实用性。更多还原

【Abstract】 According to the properties of simulated cone-beam computed tomography projection, a suite of rapid algorithms was studied for STL phantom models based on octree. The speed of creating simulated projection images was more heightened by parallel computing the key parts of the projection calculation with SIMD technique. The experimental result shows that the algorithms achieve a speedup of 65～90 times than UG phantom projection without any image quality loss, which greatly enhance the computed speed of simulated cone-beam computed tomography projection and intensify the practicality of the simulation system.更多还原