Relationship of body mass index and abdominal fat with radiation dose received during preoperative liver CT in potential living liver donors: a cross-sectional study

Quantitative Imaging in Medicine and Surgery

article

Sunyoung Lee¹  Kyoung Won Kim²  Heon-Ju Kwon³  Jeongjin Lee⁴  Kyoyeong Koo⁴  Gi-Won Song⁵  Sung-Gyu Lee⁵ 

[1] Department of Radiology and Research Institute of Radiological Science, Severance Hospital , Yonsei University College of Medicine;Department of Radiology and Research Institute of Radiology, Asan Medical Center , University of Ulsan College of Medicine;Department of Radiology, Kangbuk Samsung Hospital , Sungkyunkwan University School of Medicine;School of Computer Science and Engineering , Soongsil University;Department of Surgery, Asan Medical Center , University of Ulsan College of Medicine

关键词: Computed tomography (CT);    liver transplantation (LT);    living donors;    radiation dose;   

DOI  :  10.21037/qims-21-977

学科分类：外科医学

来源: AME Publications

【 摘 要 】

Background: Although contrast-enhanced computed tomography (CT) is currently the most widely-used imaging modality for the preoperative evaluation of potential living liver donors, radiation exposure remains a major concern. The present study aimed to determine the relationship of body mass index (BMI) and abdominal fat with the effective radiation dose received during liver CT scans as part of a pre-donation work-up in potential living donors. Methods: This retrospective cross-sectional study included 695 potential living donors (mean age, 30.5±9.7 years; 445 men and 250 women) who had undergone preoperative liver CT scans between 2017 and 2018. The following measures were evaluated: BMI, abdominal fat as measured at the level of the third lumbar vertebra, and effective dose based on the dose length product (DLP). Correlations between the effective dose and other variables were evaluated using Pearson’s correlation coefficient. Results: The mean BMI, total fat area (TFA), and effective dose were 23.6±3.3 kg/m2, 218.7±110.0 cm2, and 9.4±3.3 mSv, respectively. The effective dose during liver CT scans had a strong positive correlation with both BMI (r=0.715; P<0.001) and TFA (r=0.792; P<0.001). As BMI and TFA increased, so did the effective dose. Conclusions: Higher BMI and TFA significantly increased the radiation dose received during liver CT scans in potential living donors.

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