Table 3.
Average absolute quantitative errors and average absolute changes of source activities
|
Isotope |
Quantitative errora |
Changes induced by map inaccuracies (rotation, shift and/orμchange) with respect to references |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
0° |
0° |
0° |
0° |
0° |
0° |
15° |
0° |
0° |
15° |
||
|
1 mmX |
3 mmX |
1 mmY |
3 mmY |
1 mmZ |
3 mmZ |
0 mm |
0 mm |
0 mm |
3 mmX |
||
| 1.0 μ | 1.0 μ | 1.0 μ | 1.0 μ | 1.0 μ | 1.0 μ | 1.0 μ | 0.9 μ | 1.1 μ | 1.1 μ | ||
|
125I |
2.1 ± 6.5 |
1.5 ± 1.1 |
3.9 ± 3.1 |
1.6 ± 1.2 |
4.6 ± 3.3 |
0.9 ± 0.9 |
2.3 ± 1.9 |
2.1 ± 1.8 |
5.8 ± 1.7 |
6.1 ± 1.9 |
5.8 ± 5.4 |
|
201Tl |
3.3 ± 2.5 |
0.6 ± 0.6 |
1.7 ± 1.6 |
0.6 ± 0.4 |
1.5 ± 1.2 |
0.5 ± 0.5 |
1.2 ± 0.8 |
0.8 ± 0.8 |
3.2 ± 0.8 |
3.3 ± 0.9 |
4.4 ± 3.2 |
|
99mTc |
2.0 ± 2.5 |
0.6 ± 0.5 |
1.5 ± 1.4 |
0.4 ± 0.4 |
1.0 ± 1.0 |
0.5 ± 0.4 |
1.3 ± 1.2 |
0.5 ± 0.4 |
2.8 ± 0.6 |
2.9 ± 0.7 |
3.3 ± 2.2 |
| 111In | 2.0 ± 2.7 | 0.6 ± 0.4 | 1.6 ± 1.3 | 0.4 ± 0.3 | 1.2 ± 0.8 | 0.3 ± 0.4 | 0.8 ± 1.0 | 0.5 ± 0.8 | 2.7 ± 0.6 | 2.8 ± 0.6 | 3.9 ± 2.2 |
Average absolute quantitative errors (in %) of source activities in reference rat SPECT images were calculated with respect to dose calibrator measurements (1st data column), and average absolute changes (in %) in source activities due to attenuation map inaccuracies were calculated with respect to reference images (2nd to 11th data column). aObtained from [16].