Luggage CT reconstruction area determination method

The invention relates to a luggage CT (Computed Tomography) reconstruction area determination method, belongs to security system detection, and solves the problem of waste of computing resources of a computer caused by a large-area blank area in a CT reconstruction area in the prior art. The method comprises the following steps of: 1, extracting projection data of which the rotation angle is between s and s + m-1 from projection data for reconstructing fault data M, and representing the projection data as p1; 2, preprocessing the projection data of the p1 to obtain p2; 3, processing the p2, and determining a reconstruction region; wherein m is an angle number required for reconstructing a single fault; wherein s is an initial angle. The size of the image reconstruction area is adaptively determined according to the actual size of the detection package. 本发明涉及一种行李CT重建区域确定方法，属于安全系统检测，解决了现有技术中CT重建区域内有大面积的空白区域而造成计算机的计算资源浪费的问题。该方法包括：步骤1：在用于重建断层数据M的投影数据中，提取旋转角度从s到s+m-1之间的投影数据，表示为p1；步骤2：对p1的投影数据进行预处理，得到p2；步骤3：对p2进行处理