Influence of Body Mass Index and Abdominal Circumference on Radiation Dose During Abdominopelvic Computed Tomography

Q3 Pharmacology, Toxicology and Pharmaceutics

Biomedical and Pharmacology Journal Pub Date : 2023-09-30 DOI:10.13005/bpj/2741

Nitika C. Panakkal, Rajagopal Kadavigere, Suresh Sukumar, Ravishankar N

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Abstract

Background: Contrast-enhanced examinations of the abdomen region have a greater radiation exposure due to the multiphase abdominal computed tomography (CT) protocols. The use of automatic tube current modulation is known to reduce radiation dose and maintain or improve image quality for abdominal CT. However, using automatic tube current modulation can increase radiation dose for individuals with a larger body habitus. Objectives: The study aimed to assess the influence of body mass index and abdominal circumference on the effective dose for routinely performed contrast-enhanced abdomen and pelvis scans. Methods: A total of 160 subjects referred for routine CT abdomen and pelvis were included in the study and categorised into three groups according to their body mass index (BMI) [underweight: <18.5 kg/m2, normal: 18.5-24.9 kg/m2, overweight: 25-29.9 kg/m2 and obese: (≥30 kg/m2]. All the scans were performed on a 128 MDCT scanner by Philips. The effective dose was calculated from the dose length product using region-specific conversion factors. Results: The effective dose was found to be 21.47 ± 2 mSv for the underweight group, 22.75± 2.3 mSv for the normal group, 25.02 ± 2.8 for the overweight group, and 29.7 ± 6.7 mSv for the obese group. Conclusion: The study reported a 32.39 % increase in effective dose for obese patients. The study also reported a significant increase in effective dose as BMI and abdominal circumference increased.

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体质量指数和腹围对骨盆计算机断层扫描辐射剂量的影响

背景:由于腹部多期计算机断层扫描(CT)协议，腹部区域的对比增强检查有更大的辐射暴露。使用自动管电流调制是已知的减少辐射剂量和维持或提高图像质量的腹部CT。然而，对于体型较大的个体，使用自动管电流调制会增加辐射剂量。目的:本研究旨在评估体重指数和腹围对常规腹部和骨盆增强扫描有效剂量的影响。方法:选取160例腹部及骨盆常规CT检查对象，根据体重指数(BMI)分为3组[体重过轻:18.5 kg/m2，正常:18.5 ~ 24.9 kg/m2，超重:25 ~ 29.9 kg/m2，肥胖:≥30 kg/m2]。所有扫描均在Philips公司的128 MDCT扫描仪上进行。有效剂量由剂量长度乘积计算，使用区域特定转换因子。结果:体重过轻组有效剂量为21.47±2 mSv，正常组为22.75±2.3 mSv，超重组为25.02±2.8 mSv，肥胖组为29.7±6.7 mSv。结论:该研究报告肥胖患者有效剂量增加32.39%。该研究还报告了有效剂量随着BMI和腹围的增加而显著增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomedical and Pharmacology Journal Pharmacology, Toxicology and Pharmaceutics-Pharmacology

CiteScore

1.20

自引率

0.00%

发文量

189

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