Energy window optimization in simultaneous SPECT(Tl-201)/TCT(Tc-99m) data acquisition

Jia Li, Benjamin M.W. Tsui, Andy Welch, Eric C. Frey, Grant T. Gullberg

Research output: Contribution to conferencePaper

Abstract

In simultaneous SPECT(Tl-201)/TCT(Tc-99m) data acquisition, emission and transmission images are degraded by both scatter photons and cross-contamination between emission and transmission photons. In this work, we aim to reduce these image degradations by optimizing the position and width of the energy window in a triple-camera fan-beam SPECT system. A statistical criterion based on maximizing the Figure-of-Merit (FOM) was used in the optimization by determining a compromise between increased detection efficiency of primary photons and reduced scatter and contamination photons. Scatter events were modeled using Monte Carlo (MC) simulation method. Experimental studies were performed to verify the simulations and to estimate the lead x-rays and scatter in the collimator which were not modeled in the MC program. Results suggest that cross-contamination degrades the emission and transmission data. However they do not significantly alter the optimal energy window settings which centered at 75 keV with a window width of 30-35% for detecting the Tl emission photons, and centered at 140 keV with a window width of 15approx.20% for detecting the Tc transmission photons.

Original languageEnglish (US)
Pages1587-1591
Number of pages5
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA
Duration: Oct 30 1994Nov 5 1994

Other

OtherProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4)
CityNorfolk, VA, USA
Period10/30/9411/5/94

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Energy window optimization in simultaneous SPECT(Tl-201)/TCT(Tc-99m) data acquisition'. Together they form a unique fingerprint.

  • Cite this

    Li, J., Tsui, B. M. W., Welch, A., Frey, E. C., & Gullberg, G. T. (1995). Energy window optimization in simultaneous SPECT(Tl-201)/TCT(Tc-99m) data acquisition. 1587-1591. Paper presented at Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4), Norfolk, VA, USA, .