Convolution-subtraction technique to compensate for downscatter effects in simultaneous Tl-201/Tc-99m cardiac SPECT

Lin Qian, ZongJian Cao

Research output: Contribution to conferencePaper

Abstract

A convolution-subtraction method to remove the downscatter counts in the 70 keV projection data is proposed. First, the scatter response function (SRF) is derived by fitting the Monte Carlo simulated downscatter data acquired in the 70 keV window for Tc-99m point source located in a uniform elliptical cylinder. Then, the derived SRF is convolved with the reconstructed 140 keV image to obtain the spatial distribution of downscatter counts in the 70 keV window. Finally, the downscatter distribution is subtracted from the 70 keV data to obtain the compensated data.

Original languageEnglish (US)
Pages1274-1278
Number of pages5
Publication statusPublished - Dec 1 1997
EventProceedings of the 1997 IEEE Nuclear Science Symposium - Albuquerque, NM, USA
Duration: Nov 9 1997Nov 15 1997

Other

OtherProceedings of the 1997 IEEE Nuclear Science Symposium
CityAlbuquerque, NM, USA
Period11/9/9711/15/97

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Qian, L., & Cao, Z. (1997). Convolution-subtraction technique to compensate for downscatter effects in simultaneous Tl-201/Tc-99m cardiac SPECT. 1274-1278. Paper presented at Proceedings of the 1997 IEEE Nuclear Science Symposium, Albuquerque, NM, USA, .