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arXiv 1601.04548physics.med-ph
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使用双能计算机断层成像进行基于图像的电子密度评估的方法学准确性

Methodological accuracy of image-based electron-density assessment using dual-energy computed tomography

Christian Möhler, Patrick Wohlfahrt, Christian Richter, Steffen Greilich

摘要:

目的:电子密度是影响放射治疗患者光子和离子剂量分布的最重要的组织特性。双能计算机断层成像(DECT)能够通过结合在两个不同管电压下获得的光子衰减信息来确定电子密度。迄今为止提出的大多数算法使用在图像重建之后提供的CT数作为输入参数,即,是基于图像的。为了探索这些方法可以实现的准确性,我们量化了看似最简单的方法的内在方法和校准不确定性。

英文摘要:

Purpose: Electron density is the most important tissue property influencing photon and ion dose distributions in radiotherapy patients. Dual-energy computed tomography (DECT) enables the determination of electron density by combining the information on photon attenuation obtained at two different tube voltages. Most algorithms suggested so far use the CT numbers provided after image reconstruction as input parameters, i.e. are imaged-based. To explore the accuracy that can be achieved with these approaches, we quantify the intrinsic methodological and calibration uncertainty of the seemingly simplest approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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