Table 3.
Preclinical PET motion effect measurements
| Units |
Measurements |
||||||
|---|---|---|---|---|---|---|---|
| Gated | Gating+ | Gating+ with phase shift | Ungated | ||||
| Number of frames (phase increment = 360°/number) |
|
|
|
16 |
16 |
90 |
1 |
| Kidney VOI, n = 102 |
Average kidney uptake |
Average VOI value, average of all gates |
Relative values |
1.01 |
1.01 |
1.01 |
1.00 |
| % SD |
Average uptake across gates |
Percentage |
2.69 |
1.47 |
1.47 |
|
|
| Maximum displacement |
Average of all scans (SD of all scans) |
mm |
1.50 (0.56) |
1.10 (0.75) |
1.10 (0.75) |
|
|
| Liver profile, n = 34 |
Liver boundary displacement |
|
mm |
3.25 |
3.04 |
3.05 |
|
| Shoulder VOI, n = 84 |
% SD in VOI |
Average of all gates |
Relative values |
1.53 |
1.05 |
1.05 |
1.00 |
| Global COM, n = 84 | Maximum COM displacement | Average of all scans (SD of all scans) | mm | 0.71 (0.46) | 0.43 (0.41) | 0.43 (0.41) | |
Summary of VOI, line profile, and COM measurements in ungated, gated, and gating+ images across the population of preclinical PET scans. All numbers are average values of population or all appropriate population scans.