The sheet of metal is moved in a helicaltrajectory such that the second bend comes into proximity above the first bend.
该金属 板沿螺旋形轨迹移动使得该第二弯曲进入该第一弯曲的上方邻近处。
2
Using the present cone beam reconstruction formula for general trajectory, we have investigated the issue of detector efficiency for non-helicaltrajectory.