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首页> 外文期刊>Current Directions in Biomedical Engineering >Influence of 12-bit and 16-bit CT values of metals on dose calculation in radiotherapy using PRIMO, a Monte Carlo code for clinical linear accelerators : Current Directions in Biomedical Engineering
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Influence of 12-bit and 16-bit CT values of metals on dose calculation in radiotherapy using PRIMO, a Monte Carlo code for clinical linear accelerators : Current Directions in Biomedical Engineering

机译：金属的12位和16位CT值对放射治疗中使用PRIMO（临床线性加速器的蒙特卡洛代码）的剂量计算的影响：生物医学工程的当前方向

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In this paper, the effect of computed tomography (CT) values of metals in 12-bit and 16-bit extended Hounsfield Unit (EHU) scale on dose calculations in radiotherapy treatment planning systems (TPS) were quantified. Dose simulations for metals in water environment were performed with the software PRIMO in 6MV photon mode. The depth dose profiles were analysed and the relative dose differences between the metals determined with 12-bit and 16-bit CT imaging, respectively, were calculated. Maximum dose differences of ΔAl = 3.0%, ΔTi = 4.5%, ΔCr = 6.2% and ΔCu = 11.6% were measured. In order to increase the accuracy of dose calculation on patients with implants, CT imaging in the EHU scale is recommended.
机译：本文对放射治疗计划系统（TPS）中剂量的12位和16位扩展Hounsfield单位（EHU）标度的计算机X线断层扫描（CT）值对剂量计算的影响进行了量化。使用6MV光子模式下的PRIMO软件对水环境中的金属进行剂量模拟。分析了深度剂量分布，并分别计算了通过12位和16位CT成像确定的金属之间的相对剂量差异。测量了最大剂量差ΔAl＝ 3.0％，ΔTi＝ 4.5％，ΔCr＝ 6.2％和ΔCu＝ 11.6％。为了提高植入物患者剂量计算的准确性，建议使用EHU标度的CT成像。

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