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K. P. Schfers, R. Raupach, T. Beyer

Combined 18 F-FDG-PET/CT imaging of the head and neck. An approach to metal artifact correction

Keywords: Head and neck, metal artifacts, PET/CT imaging

PET/CT imaging is particularly promising for head/neck malignancies, but dental implants lead to biased CT attenuation and PET activity values following CT-based attenuation correction (CT-AC). OBJECTIVE: Here, we implement a metal artifact correction procedure (MAR) as part of the CT-AC for PET/CT imaging. RESULTS: Phantom studies indicate a maximum quantitative bias in CT and PET of 1000 HU and 30 %, which is reduced to 230 HU and 6 %, respectively following MAR. These results were verified in selected patients. CONCLUSION: Artifacts and biases from dental implants can be reduced in PET/CT imaging by applying a simple MAR as part of the CT-AC.

Nuklearmedizin, Schattauer

Print ISSN: 0029-5566
Volume: 45, 01/2006
Pages: 219 - 222

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