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| By observer | MARSS:WK | Count |
| 18:2 | 1 | |
| 19:1 | 6 | |
| 20:0 | 13 | |
| By image | MARSS:WK | Count |
| 17:3 | 1 | |
| 18:2 | 1 | |
| 19:1 | 3 | |
| 20:0 | 15 |
MARSS (metal artefact reduction by sequential substitution) is the proposed method and WK is the method of Watzke and Kalender.16
