Table 5 Range of misrepresentation of the centroid of the 10- and 31.5-mm diameter targets.
Target Diameter (mm) | S-I Motion Amplitude ± (mm) | Centroid mis-placement (mm), single-slice fast scan CT | |||||
|---|---|---|---|---|---|---|---|
S-I | A-P | R-L | |||||
Mean | 95% CI | Mean | 95% CI | Mean | 95% CI | ||
10 | 5 | -0.8 | 6.2 | 0.2 | 1.0 | 0.6 | 1.2 |
10 | -1.1 | 5.2 | 0.3 | 2.2 | 0.7 | 1.8 | |
15 | -0.7 | 7.0 | 0.2 | 1.4 | 1.6 | 3.0 | |
31.5 | 5 | -2.2 | 5.2 | -0.2 | 0.2 | -0.1 | 0.6 |
10 | -2.7 | 4.2 | -0.3 | 1.4 | 0.4 | 1.6 | |
15 | -2.5 | 8.8 | -0.5 | 1.0 | 0.1 | 1.2 | |
Target Diameter (mm) | S-I Motion Amplitude ± (mm) | Centroid mis-placement (mm), multi-slice fast scan CT | |||||
S-I | A-P | R-L | |||||
Mean | 95% CI | Mean | 95% CI | Mean | 95% CI | ||
10 | 5 | 1.1 | 4.6 | 0.0 | 1.4 | 0.5 | 0.6 |
10 | 0.4 | 3.0 | 0.0 | 1.4 | 0.4 | 1.2 | |
15 | 0.4 | 5.4 | 0.1 | 1.6 | 0.2 | 1.0 | |
31.5 | 5 | 0.5 | 3.4 | 0.3 | 0.8 | 0.7 | 0.8 |
10 | 1.2 | 5.4 | 0.1 | 1.0 | 1.1 | 1.2 | |
15 | 2.0 | 5.4 | -0.4 | 0.8 | 0.8 | 1.2 | |
Target Diameter (mm) | S-I Motion Amplitude ± (mm) | Centroid mis-placement (mm), single-slice slow scan CT | |||||
S-I | A-P | R-L | |||||
Mean | 95% CI | Mean | 95% CI | Mean | 95% CI | ||
10 | 5 | -0.2 | 1.8 | 1.2 | 2.4 | 2.4 | 2.8 |
10 | -0.9 | 2.6 | 3.3 | 1.4 | 4.2 | 1.8 | |
15 | -1.3 | 1.4 | 5.9 | 3.6 | 7.1 | 3.6 | |
31.5 | 5 | -2.2 | 3.4 | 0.0 | 1.0 | 1.3 | 3.6 |
10 | -1.8 | 2.6 | 0.0 | 2.4 | 0.8 | 2.2 | |
15 | -2.8 | 2.4 | 0.9 | 3.4 | 1.6 | 2.4 | |