IRIS effect on calcium blooming artifact

The following question has been sent by Robert Kleinmann, USA:

Does iterative reconstruction in general and IRIS specifically decreased blooming artifact from calcific plaque in coronary cta and to what extent. Is there a difference between the benefits derived from IRIS between its use with the Definition scanner versus the Flash?

Stephan Achenbach,  MD, University Hospital Erlangen:

IRIS reconstruction mainly reduces noise – in my experience – and may therefore contribute a little towards reducing blooming in the context of sever calcification. You are able to usse thineer slice recons with less penalty as far as noise goes. There should be no difference between the Definition and Flash.