Mutanga Theodore wrote: > I also found out that the axial sampling interval is 1/2*axial pitch ??? > Am I right ? Yes Claude -- Claude Comtat comtat at ieee.org Image acquisition and processing group tel: +33 1 69 86 77 02 Frédéric Joliot Hospital Facility fax: +33 1 69 86 77 49 French Atomic Energy Commission www-dsv.cea.fr/shfj