Standard SPECT Reconstruction Window Filter Functions
| Filter | Filter variables |
|---|---|
| Band-limited ramp | Cut-off frequency |
| Shepp-Logan | Cut-off frequency |
| Shepp-Logan-Hanning | Cut-off frequency |
| Generalized Hamming | Cut-off frequency, a weighting coefficient |
| Low-pass cosine | Cut-off frequency |
| Butterworth | Cut-off frequency, order |
| Parzen | Cut-off frequency |