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