Compensation for Non-stationary Detector Response in Analytical Varying Focal-length Fan-beam SPECT Reconstruction

Tianfang Li*, Junhai Wen, Zhengrong Liang

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

In this study, a non-stationary filtering technique was developed to compensate for spatially variant detector response in varying focal-length fan-beam (VFF) collimated SPECT. First a collimator coordinate system was introduced in order to derive the geometric transfer function and the frequency-distance relation for VFF collimator from its parallel-beam and fan-beam counterparts, and then the Fourier transform of the detector response was computed and used to construct a Wiener filter. The filter was applied to the blurred projection data before image reconstruction. Experimental results demonstrated improved resolution in reconstructed images after the non-stationary filtering.

Original languageEnglish
Pages1686-1690
Number of pages5
Publication statusPublished - 2002
Externally publishedYes
Event2002 IEEE Nuclear Science Symposium Conference Record - Norfolk, VA, United States
Duration: 10 Nov 200216 Nov 2002

Conference

Conference2002 IEEE Nuclear Science Symposium Conference Record
Country/TerritoryUnited States
CityNorfolk, VA
Period10/11/0216/11/02

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