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The Effect of Metallic Dental Implant on Positron Emission Tomography Computed Tomography Image

금속성 치아충전물이 PET/CT영상이 미치는 영향

  • 김기진 (건양대학교병원 핵의학과) ;
  • 배석환 (건양대학교 방사선학과) ;
  • 한상현 (서남대학교 방사선학과) ;
  • 유세종 (건양대학교병원 영상의학과) ;
  • 이보우 (건양대학교병원 영상의학과)
  • Received : 2012.02.10
  • Accepted : 2012.03.02
  • Published : 2012.03.31

Abstract

Beam hardening artifact happens in the CT image. when a PET/CT is conducted while there is a metallic dental implant. The artifact appears in the CT image can affect the PET image. When the patient with head and neck cancer has a metallic dental implant, Beam hardening artifact which was taken in th CT image can change the PET image and SUV value. Therefore, by Quantitative measure of the SUV according to the change in HU by the metallic dental implant, the appropriacy in the clinical application was assessed. The records of 47 patients with PET/CT August 2011. For the analysis, 2 region of interest were defined in area where CT and PET image. As a result of the experiment, if there in an implant, the HU and the SUV increased and there existed a statistically significant difference(p<0.01). Although this level of increase was not large compared with that in the patient who have no metallic dental implant, when a person has head and neck cancer, it is even more likely to be overestimated when diagnosing the cancer. When conducting PET/CT for the patient who have head and neck cancer, the physical biological parts should be considered in order not to make an error in decoding.

Keywords

Metallic Dental Implant;Standardized Uptake Value;PET/CT