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 language | English |
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Pages | 1686-1690 |
Number of pages | 5 |
Publication status | Published - 2002 |
Externally published | Yes |
Event | 2002 IEEE Nuclear Science Symposium Conference Record - Norfolk, VA, United States Duration: 10 Nov 2002 → 16 Nov 2002 |
Conference
Conference | 2002 IEEE Nuclear Science Symposium Conference Record |
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Country/Territory | United States |
City | Norfolk, VA |
Period | 10/11/02 → 16/11/02 |