Errors in Activity Estimates and in BP Values for Real Acquisitions
| Correction | Method | % Error in estimate for: | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Activity | BP | |||||||||
| Putamen | Caudate nuclei | Background | Putamen | Caudate nuclei | ||||||
| None | 20% + OSEM | −89 (−86) | −91 (−89) | −67 (−65) | −71 (−69) | −76 (−75) | ||||
| AC | 20% + OSEM-A | −65 (−59) | −69 (−67) | −12 (+1) | −69 (−68) | −73 (−74) | ||||
| SAC | TEW + OSEM-A | −52 (−47) | −59 (−57) | −4 (+10) | −58 (−60) | −64 (−68) | ||||
| AC-PVC | 20% + OSEM-A + PVC1 | −24 (−10) | −25 (−18) | −12 (+1) | −16 (−13) | −16 (−20) | ||||
| 20% + OSEM-A + PVC2 | −25 (−11) | −23 (−17) | −12 (+1) | −17 (−13) | −14 (−19) | |||||
| SAC-PVC | TEW + OSEM-A + PVC1 | +7 (+19) | +7 (+9) | −4 (+10) | +13 (+10) | +13 (−1) | ||||
| TEW + OSEM-A + PVC2 | +6 (+19) | +9 (+10) | −4 (+10) | +12 (+8) | +15 (−1) | |||||
Putamen and caudate nucleus percent errors were averaged over right and left structures. Results are given for emission and transmission data acquired sequentially and simultaneously (latter values in parentheses).