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. 2019 Jan 12;92(1096):20180756. doi: 10.1259/bjr.20180756

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© 2019 The Authors. Published by the British Institute of Radiology

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Figure 7. — Impact of iMAR on delineation of a retroperitoneal lymph node metastasis in the vicinity of an internal fixator [A, score 1 (noMAR) vs score 2 (iMAR)], a sigmoid carcinoma adjacent to coils in the right A. iliaca interna [B, score 1 (noMAR) vs score 2 (iMAR)] and a lymph node metastasis in neck level III in the vicinity to dental implants [C, score 1 (noMAR) vs score 2 (iMAR)]. The respective lesions are poorly delineable in noMAR CT (upper rows, left columns) while iMAR improves its delineation (upper rows, right columns). No impact of iMAR on PET quantification and qualitative PET evaluation was observed [bottom rows, e.g. dental implants, SUVmean 16.9 (iMAR) vs 16.8 (noMAR)]. CI, confidence interval; HU, Hounsfield unit; iMAR, iterative metal artifactreduction; SUV, standard uptake value.