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. 2014 Jul;35(7):1288–1292. doi: 10.3174/ajnr.A3851

Fig 1.

Fig 1.

Hounsfield unit value range and noise were measured by two 1.5 × 1.5 cm2 square ROIs. The first region of interest (ROI1) is placed in the region with most severe artifacts in the vicinity of the metal implant (A). The second region of interest (ROI0) is placed in the section just above the target metal object, which is degraded by metallic artifacts (B).