In the article titled “Polychromatic Iterative Statistical Material Image Reconstruction for Photon-Counting Computed Tomography” [1], there were errors in equations (13) and (28) in addition to some errors in the text. This should be corrected as follows:
Equation should be corrected to
The text between equations and should be corrected to
Since is a convex function, it holds that
(3) Equation (28) should be corrected to
In the “Summary of the Algorithm” subsection, step 3 should be corrected to
Additionally, calculate
which equates to .