Table 1.
Mean, standard deviation (SD), maximum and minimum of Hounsfield unit (HU) of head phantom on regions of interest (ROIs) 1 and 2
| ROI | Number of metal screws | Without SEMAR |
With SEMAR |
||||
|---|---|---|---|---|---|---|---|
| Mean ± SD (HU) | Min (HU) | Max (HU) | Mean ± SD (HU) | Min (HU) | Max (HU) | ||
| ROI 1 | 0 | 20.8 ± 6.3 | −2 | 43 | 20.8 ± 6.3 | −2 | 43 |
| 1 | 5.6 ± 48.2 | −189 | 95 | 19.4 ± 14.0 | −33 | 82 | |
| 2 | −31.3 ± 86.9 | −695 | 187 | 18.6 ± 18.0 | −82 | 95 | |
| 3 | −58.7 ± 97.0 | −768 | 289 | 19.4 ± 18.5 | −88 | 98 | |
| ROI 2 | 0 | 8.5 ± 5.5 | −8 | 28 | 8.5 ± 5.5 | −8 | 28 |
| 1 | 5.9 ± 6.4 | −12 | 30 | 7.6 ± 6.2 | −12 | 30 | |
| 2 | 4.3 ± 7.5 | −16 | 34 | 7.9 ± 7.0 | −14 | 32 | |
| 3 | 1.6 ± 9.4 | −18 | 39 | 7.0 ± 6.4 | −18 | 36 | |
Max, maximum; Min, minimum; SEMAR, single-energy metal artefact reduction.