METHOD FOR RE-CONSTITUTING IMAGE OF HELICAL CT DEVICE AND HELICAL CT DEVICE FOR EXECUTING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain an improved method concerning a layer sensitiveness profile by including a process for re-constituting an image based on the usage of an algorithm as against a row detector in consideration of the interval of the elements of the row detector in weighting a measurement value and without considering the channel angle of each detection element in a row.;SOLUTION: A computer or the like constituted as a parallel computer in an image re-constitution process integrates helical data existing in the fan geometry of the elements of the M-th row detector by each addition by weighting concerning a projection angle , a row number i=1, 2,... M and a required image position z ima against each projection angle in order to generate a one-row projection against each projection angle , that is, the projection obtained by the detector having the element of a single row. The weighting against the multi-row projection in the case of the projection angle is not related to the z-position of another multi-row projection, which is different from the 360L1 or 180L1 internal insertion as in a conventional manner. Therefore, the individual projections are successively processed in no relation with each other.;COPYRIGHT: (C)2000,JPO