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An overall X-ray system simulation model developed for system design and image quality versus patient dose optimization

机译:开发了用于系统设计和图像质量与患者剂量优化的整体X射线系统仿真模型

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We have developed a full-scale image quality (IQ) simulation model as a tool for X-ray system design, image quality optimization and patient dose reduction. The IQ model supports the (de-)composition of system level requirements and simulates several types of automatic X-ray control technique. The model is implemented in Lab VIEW~R. The X-ray system is modeled in distinguishable components and processes, which allows isolation of sub-systems and exclusion of devices. All relevant patient dose and IQ items such as contrast, sharpness, lag and noise are calculated and additionally combined in IQ "figures of merit" (FOM). Some characteristic application examples will be presented: In a general image magnification study we compare magnification techniques, such as geometric enlargement, image intensifier zooming and digital processing. In an optimization study we apply a new IQ FOM that contains not only imaging properties of the system, but also detail information in terms of material, size and thickness. Combining the IQ simulation model with a Pareto trade-off algorithm appears to be a promising optimization approach. In addition to the mentioned employment, the IQ simulation model is also suitable for comparison studies on the performance of flat detectors versus image intensifier television detectors, application related studies and fine tuning of specific settings and adjustments, design of test objects and development of measuring methods.
机译:我们已经开发了全面的图像质量(IQ)模拟模型,作为X射线系统设计,图像质量优化和减少患者剂量的工具。 IQ模型支持系统级别要求的(分解)组合,并模拟几种类型的自动X射线控制技术。该模型在Lab VIEW〜R中实现。 X射线系统以可区分的组件和过程为模型,从而可以隔离子系统并排除设备。计算所有相关的患者剂量和IQ项,例如对比度,清晰度,滞后性和噪声,并附加在IQ“品质因数”(FOM)中。将提供一些典型的应用示例:在一般的图像放大研究中,我们比较了诸如几何放大,图像增强缩放和数字处理之类的放大技术。在优化研究中,我们应用了新的IQ FOM,它不仅包含系统的成像特性,而且还包含有关材料,尺寸和厚度的详细信息。将IQ模拟模型与Pareto权衡算法相结合似乎是一种很有前途的优化方法。除了上述用途外,IQ仿真模型还适用于平板探测器与图像增强电视探测器的性能比较研究,与应用相关的研究以及对特定设置和调整的微调,测试对象的设计以及测量方法的开发。

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