SPRINT II: a second generation single photon ring tomograph

W L Rogers; N H Clinthorne; L Shao; P Chiao; Y Ding; J A Stamos; K F Koral

doi:10.1109/42.14511

SPRINT II: a second generation single photon ring tomograph

IEEE Trans Med Imaging. 1988;7(4):291-7. doi: 10.1109/42.14511.

Authors

W L Rogers¹, N H Clinthorne, L Shao, P Chiao, Y Ding, J A Stamos, K F Koral

Affiliation

¹ Michigan Univ. Med. Center, Ann Arbor, MI.

PMID: 18230481
DOI: 10.1109/42.14511

Abstract

SPRINT II is a stationary detector ring tomograph designed for brain imaging. Eleven two-dimensional sodium iodide camera modules that use maximum-likelihood position logic are arranged in a 50-cm-diameter ring with a scintillator packing fraction of 96%. A 34-cm-diameter rotating lead aperture ring containing either 10 or 12 slits is used for in-plane collimation, while the z-axis collimator is constructed of parallel lead foil rings. The field of view is 22 cm in diameter by 12 cm long. Sensitivity is 10 count/s/muCi for an on-axis (99m)Tc point source and 8500 count/s/muCi/cm(3) for 19.8-cm-diameter by 6.2-cm-long cylindrical source. Longitudinal resolution is 10 mm FWHM, and in-plane resolution varies from 8 mm FWHM on-axis to 5 mm FWHM at a radius of 9 cm. Performance results are presented.