The main purpose of this study was to determine local diagnostic reference level (LDRL) for Routine Computed Tomography (CT) examination in, Jimma University Medical Center (JUMC) South West Ethiopia. Retrospective study was conducted to determine LDRL for routine CT examination in JUMC. We have considered CTDIvol and DLP as dosimetric quantity based on the recommended guidelines to determine LDRLs by different international legal Authorities. The 75th percentile values of the calculated CTDIvol and DLP were proposed as LDRL. LDRL was obtained as CTDIvol, 42.97mGy, 7.76mGy, 14.32mGy, and 10.86mGy for routine brain CT, routine chest CT, routine thoraco-lumbar CT and routine abdomen CT examination respectively. Similarly the determined LDRL from DLP was 1364.15mGycm, 368.96mGycm, 853.18mGycm, and 1568.96mGycm for brain, chest, thoraco-lumbar and abdomen examination respectively. The LDRL obtained for DLP was higher compared with international DRLs; it can be reduced by coordinating effort between radiologists, technologists and medical physicist.

中文翻译：

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在 JIMMA 大学医学中心西南埃塞俄比亚建立常规计算机断层扫描检查的本地诊断参考水平

本研究的主要目的是确定埃塞俄比亚西南部吉马大学医学中心 (JUMC) 常规计算机断层扫描 (CT) 检查的局部诊断参考水平 (LDRL)。进行回顾性研究以确定 JUMC 常规 CT 检查的 LDRL。我们已根据不同国际法律机构推荐的确定 LDRL 的指南将 CTDIvol 和 DLP 视为剂量计量量。计算的 CTDIvol 和 DLP 的第 75 个百分位值被提议为 LDRL。常规脑CT、常规胸部CT、常规胸腰椎CT和常规腹部CT检查的LDRL分别为CTDIvol、42.97mGy、7.76mGy、14.32mGy和10.86mGy。同样，从 DLP 确定的 LDRL 为 1364.15mGycm、368.96mGycm、853.18mGycm 和 1568.96mGycm，用于大脑、胸部、分别进行胸腰椎和腹部检查。与国际 DRL 相比，DLP 获得的 LDRL 更高；它可以通过放射科医师、技术人员和医学物理学家之间的协调努力来减少。