Optimizing rod window width in positron emission tomography

W.F. Jones, W.M. Digby, W.K. Luk, M.E. Casey, L.G. Byars
1995 IEEE Transactions on Medical Imaging  
A technique determines the optimal rod window width for rotating rod transmission studies in positron emission tomography VEX). Rod windowing reduces noise in rotating rod transmission studies. Lines-of-response (LOR) which intersect the rads generate primarily true coincidence events. LOR which pass far from the rods generate random and scatter events. Since the angular pasition of the rotating rods is known in realtime, LOR which produce mostly noise are gated &. When optimally determined,
more » ... rod window width maximines the noise effective coullts (NE0 collected in the transmission study. Transaxial rod projection profiles of trues, randoms, and scatter produce NEC plots versus window width. For the ECAT EXACT (921) line of PET systems and a 20 cm water cylinder, optimal is 5 interleaved parallel LOR wide.
doi:10.1109/42.387708 pmid:18215830 fatcat:h4ted25jyzbxjpipadgytqrvb4