Addition tomographic image producing method and X-ray CT apparatus

摘要

In order to eliminate the adverse effect of the partial volume in producing an addition tomographic image by adding a plurality of tomographic images having different slice thicknesses, an offset correction and a sensitivity correction are applied to row data Ij (j=1-J) from which respective tomographic images Gj can be reconstructed; addition data K is generated by performing a weighted addition on the row data Ij with a weight Tj/SIGMATj corresponding to the slice thickness Tj; logarithm processing is applied to the addition data K; and then the addition data is subjected to reconstruction to produce an addition tomographic image G.