Abstract With 75.4% of the effective doses from imaging estimated to result from computed tomography (CT), it is the leading source of medical radiation. This important observation links with a further estimate that some 2% of all cancers are a result of medical imaging exposures. Acknowledging justification and optimization to be key towards preventing unnecessary radiation exposure, present study aims to investigate radiation exposures reduction for patients undergoing multiphase CT abdomen. Study was made of 111 CT examinations, use being made of two imaging protocols. Of these cases, 55 (49.5%) were obtained using a standard imaging protocol, the remainder being studied using the pure 3D SureExposure™ low-dose technique to obtain a complete abdomen multi-phase examination. Image quality was the subject of blind analysis by two experienced radiologists. For the standard imaging protocol, the mean and standard deviation for CTDIvol and DLP were respectively 7.2 ± 2.3 mGy and 1325 ± 605 mGy cm. For the pure 3D SureExposure™ low-dose technique the respective values were 5.2 ± 1.6 mGy and 812 ± 157 mGy cm. With an achieved mean dose reduction of up to 48%, use of the low dose techniques offers appreciable potential for dose saving without affecting the image quality.

中文翻译：

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使用商业迭代重建技术包减少患者辐射剂量

摘要 75.4% 的成像有效剂量来自计算机断层扫描 (CT)，它是医学辐射的主要来源。这一重要观察结果与进一步估计有关，即所有癌症中约有 2% 是由医学成像暴露引起的。承认合理性和优化是防止不必要的辐射暴露的关键，本研究旨在调查接受多期 CT 腹部患者的辐射暴露减少。研究由 111 次 CT 检查组成，使用两种成像协议。在这些病例中，有 55 例 (49.5%) 是使用标准成像协议获得的，其余病例正在使用纯 3D SureExposure™ 低剂量技术进行研究，以获得完整的腹部多阶段检查。图像质量是两位经验丰富的放射科医生进行盲法分析的主题。对于标准成像协议，CTDIvol 和 DLP 的平均值和标准偏差分别为 7.2 ± 2.3 mGy 和 1325 ± 605 mGy cm。对于纯 3D SureExposure™ 低剂量技术，各自的值为 5.2 ± 1.6 mGy 和 812 ± 157 mGy cm。由于实现了高达 48% 的平均剂量降低，低剂量技术的使用提供了可观的剂量节省潜力，而不会影响图像质量。