Table 1. .
Phantom measurements: Values of HU and SUV measurement for bright and dark band artifacts in WFBP, MARIS, and iMAR. HU, SUVmax and SUVmean values of bright band artifacts significantly decreased, and of dark band artifacts significantly increased in IMAR compared to WFBP. MARIS showed no significant impact on HU and SUV measurements in comparison with WFBP
| bright band | dark band | ||
|---|---|---|---|
| HU | WFBP | 261.4 ± 98.8 | −241.6 ± 121.5 |
| MARIS | 197.5 ± 67.4 | −171.2 ± 71.9 | |
| iMAR | 48.0 ± 26.4a | −20.7 ± 13.9a | |
| SUVmean | WFBP | 1.15 ± 0.04 | 0.75 ± 0.10 |
| MARIS | 1.11 ± 0.06 | 0.81 ± 0.07 | |
| iMAR | 0.99 ± 0.08a | 1.00 ± 0.01a | |
| SUVmax | WFBP | 1.33 ± 0.11 | 0.95 ± 0.15 |
| MARIS | 1.25 ± 0.10 | 1.03 ± 0.09 | |
| iMAR | 1.14 ± 0.14a | 1.19 ± 0.02a |
HU: Hounsfield unit; MARIS: metal artifact reduction in image space; SUV: standardized uptake value; WFBP: weighted filtered back projection; iMAR: iterative metal artifact reduction.
a
p<0.017 between WFBP and iMAR