Objective:To investigate the optimal preset parameters of iterative metal artifact reduction (iMAR) for reducing metal artifacts in abdominal CT after 125I seeds implantation.Methods:Seventeen patients who underwent abdominal 125I seeds implantation surgery in our hospital from January 2023 to April 2024 were included.The abdominal CT images were post processed using eight currently available iMAR presets.In each set of images,the region of interest is placed in the adjacent tissue area affected by the 125I seeds,the low-density artifact area around the 125I seeds,the high-density artifact area,and the contralateral vertebral muscle.The artifact index (AI),standard deviation (SD) within the ROI and subjective scoring values of each group of images were compared with images without iMAR (iMARNO).Results:Among the eight presets,the AI and SD values of the images in the neuro-coils (NC) preset parameter group were the lowest.In subjective evaluation,the NC preset group image also obtained the highest subjective evaluation value.Conclusion:Among the eight presets for iMAR,the NC preset has the most significant effect on reducing CT imaging artifacts after abdominal 125I seeds implantation.
万方数据