siddonCOCA³¹⁵¹¹¹⁺⁴BNC¹⁴⁴⁶⁶⁴⁺³ 基本例句 🌏锡顿 The Radon transform of the projection is calculated in the filtered process of exact reconstruction, Siddon and Simpson integral are used to sample the pixels to get the projection. 在精确重建滤波过程中,需要计算投影数据的雷当变换,本文采用普通累加法和辛普森直线积分法来完成对象素网格的采样。 cnki