幕后投影，背景放映...

A fast backprojection algorithm for Computerized Tomography ( CT ) fan - beam reconstruction is proposed.提出了一种用于扇束CT ( 计算机断层扫描 ) 重建的快速滤波反投影算法....

backprojection的音标：backprojection的英式发音音标为：[bækprəd'ʒekʃn]backprojection的美式发音音标为：[bækprəd'ʒekʃn]...