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首页> 外文期刊>Journal of synchrotron radiation >Optimization of analyzer-based imaging systems for minimal surface absorbed dose
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Optimization of analyzer-based imaging systems for minimal surface absorbed dose

机译：优化基于分析仪的成像系统，以最小化表面吸收剂量

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Analyzer-based imaging has improved tissue X-ray imaging beyond what conventional radiography was able to achieve. The extent of the improvement is dependent on the crystal reflection used in the monochromator and analyzer combination, the imaging photon energy, the geometry of the sample and the imaging detector. These many factors determine the ability of the system to distinguish between various bone tissues or soft tissues with a specified statistical certainty between pixels in a counting detector before any image processing. The following discussion will detail changes in the required number of imaging photons and the resulting surface absorbed dose when the imaging variables are altered. The process whereby the optimal imaging parameters to deliver the minimum surface absorbed dose to a sample while obtaining a desired statistical certainty between sample materials for an arbitrary analyzer-based imaging system will be described. Two-component samples consisting of bone and soft tissue are discussed as an imaging test case. The two-component approach will then be generalized for a multiple-component sample.
机译：基于分析仪的成像技术已经提高了组织X射线成像的水平，超过了常规放射线照相所能达到的水平。改善的程度取决于单色仪和分析仪组合中使用的晶体反射，成像光子能量，样品的几何形状和成像检测器。这些因素决定了系统在进行任何图像处理之前，在计数检测器中的像素之间以指定的统计确定性区分各种骨骼组织或软组织的能力。以下讨论将详细介绍当更改成像变量时所需的成像光子数量以及所产生的表面吸收剂量的变化。将描述用于为基于分析仪的任意成像系统在样品材料之间获得期望的统计确定性的同时将最小表面吸收剂量递送至样品的最佳成像参数的过程。作为成像测试案例，讨论了由骨骼和软组织组成的两组分样品。然后将针对多组分样本推广两组分方法。

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