Abstract
Scatter compensation using iterative reconstruction results in improved image quality and quantitative accuracy compared to subtraction-based methods. However, this requires knowledge of the spatially-varying, object-dependent scatter response function (SRF). We have previously developed a method, slab derived scatter estimation (SDSE) for estimating the SRF. However, this method has reduced accuracy for nonuniform attenuators and Tl-201 imaging. In this paper we present a new method which provides better modeling of the SRF for Tl-201 SPECT, and should provide improved accuracy for nonuniform attenuators. The method requires 3 image space convolutions and an attenuated projection for each viewing angle. Implementation in a projector-backprojector pair for use with an iterative reconstruction algorithm would require 2 image space Fourier transforms and 6 image space inverse Fourier transforms per iteration. We observed good agreement between SRFs and projection data estimated using this new model compared to those obtained using Monte Carlo simulations.
| Original language | English (US) |
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| Pages | 1082-1086 |
| Number of pages | 5 |
| State | Published - 1996 |
| Externally published | Yes |
| Event | Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) - Anaheim, CA, USA Duration: Nov 2 1996 → Nov 9 1996 |
Other
| Other | Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) |
|---|---|
| City | Anaheim, CA, USA |
| Period | 11/2/96 → 11/9/96 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging