Beam hardening artifact can be caused by metal material when performing PET exam. Therefore, we studied a solution decreasing artifact caused by metallic dental implant. The higher voltage, the lesser artifact in CT exam. But Higher voltage dosen't affect PET exam. The thicker silicon the lesser artifact in CT&PET exam. Both methods make less artifact in CT&PET exam. But considering safety of patient, the way of using Silicon is better.

• 김기진(건양대학교병원 영상의학과)
• 김정호(건양대학교병원 방사선종양학과)
• 김덕균(건양대학교병원 영상의학과)
• 이강석(건양대학교병원 영상의학과)
• 박영주(건양대학교병원 영상의학과)
• 임재동(대원대학교 방사선학과)