短語詞組短語backprojection dosimetric algorithm 反曏投影算法Filtered backprojection algorithm 濾波反投影算法fiter backprojection algorithm 濾波反投影算法a new filtered backprojection algorithm 濾波反投影算法space -variant filtered backprojection algorithm 空間可變?yōu)V波反投影重建算法 返回 backprojection algorithm