PMID: 9194133Jun 1, 1997Paper

SPECT scatter modelling in non-uniform attenuating objects

Physics in Medicine and Biology
F J BeekmanP P van Rijk

Abstract

SPECT quantitation and image contrast are degraded by photon scatter. Water equivalent depths (WEDs) have been used by several investigators to model scatter responses in non-uniform attenuators. The drawback of this approach is the occurrence of undesired fluctuations in the shape of the scatter responses, as is shown by measurements. An improvement of the WED method is presented, based on the assumption that only a part of the scattering object (the region in the 'scatter cone') contributes significantly to the detected scatter events. The remaining part of the object is treated as a uniform medium. The extension of the WED method with extra-conical invariance (WEDECI) is evaluated by projection measurements of a phantom with a 99mTc source. Shapes of scatter responses predicted by the WEDECI method are found to agree better with the measurements than those predicted by conventional WEDs.

References

Aug 1, 1989·Computer Methods and Programs in Biomedicine·M Ljungberg, S E Strand
Feb 1, 1997·IEEE Transactions on Medical Imaging·J W Wallis, T R Miller
Jan 1, 1995·IEEE Transactions on Medical Imaging·F J Beekman, M A Viergever

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Citations

Oct 31, 1998·Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology·B M TsuiG T Gullberg
Sep 24, 2005·Physics in Medicine and Biology·Jinyi Qi, Ronald H Huesman
Dec 10, 1999·Medical Physics·F J BeekmanM A Viergever
Dec 11, 2002·IEEE Transactions on Medical Imaging·Freek J BeekmanSander van Geloven
Aug 12, 2005·IEEE Transactions on Medical Imaging·Yong DuEric C Frey
May 17, 2007·Physics in Medicine and Biology·Steven StaelensFreek Beekman
Sep 24, 2005·Physics in Medicine and Biology·Bin HeEric C Frey
Sep 3, 1999·Physics in Medicine and Biology·F J BeekmanE T Slijpen
Jul 3, 1998·Physics in Medicine and Biology·F J BeekmanW J Niessen
Mar 30, 2001·Physics in Medicine and Biology·H W de Jong, F J Beekman
Aug 1, 1997·Physics in Medicine and Biology·F J BeekmanE C Frey
Dec 4, 2003·Nihon Hoshasen Gijutsu Gakkai zasshi·Hideo Onishi
Jun 28, 2011·Physics in Medicine and Biology·Brian F HuttonFreek J Beekman
Aug 4, 2005·Physics in Medicine and Biology·D LazaroI Buvat

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