Spektr: A computational tool for x-ray spectral analysis and imaging system optimization
Spektr: A computational tool for x-ray spectral analysis and imaging system optimization
复制标题
DOI：
10.1118/1.1758350
复制
发表时间：
2004-11-01
期刊：
影响因子：
3.8
通讯作者：
Jaffray, DA
中科院分区：
文献类型：
--
作者：
Siewerdsen, JH;Waese, AM;Jaffray, DA
提供了一套计算工具，可以方便地计算X射线光谱，选择元素和化合物滤光片，以及计算光束质量特性，如半值层、MR/mAs和单位曝光的注量。Boone和Seibert的TASMIP模型适用于高级语言(MatLab(TM))函数库，并在KVP和束流过滤的大范围内与实验测量相一致。由美国国家标准与技术研究所编制的一个方便、可扩展的质量和质量-能量衰减系数数据库促进了束流过滤的建模。这些功能和数据库集成在一个图形用户界面中，并可在http://www.aip.org/epaps/epaps.html.上在线使用该工具包的功能和研究成像系统优化的潜力通过对直接和间接检测平板成像器的广泛KVP、滤光片材料类型和滤光片厚度范围内的成像性能的理论计算来说明。这些计算揭示了这类探测器的能量响应中的一些不平凡的影响，这可能是简单的K边滤波技术所不能猜到的，并指出了关于光束过滤选择的各种令人信服的假设，这些假设值得进一步研究。(C)2004年美国医学物理学家协会。
A set of computational tools are presented that allow convenient calculation of x-ray spectra, selection of elemental and compound filters, and calculation of beam quality characteristics, such as half-value layer, mR/mAs, and fluence per unit exposure. The TASMIP model of Boone and Seibert is adapted to a library of high-level language (Matlab(TM)) functions and shown to agree with experimental measurements across a wide range of kVp and beam filtration. Modeling of beam filtration is facilitated by a convenient, extensible database of mass and mass-energy attenuation coefficients compiled from the National Institute of Standards and Technology. The functions and database were integrated in a graphical user interface and made available online at http://www.aip.org/epaps/epaps.html. The functionality of the toolset and potential for investigation of imaging system optimization was illustrated in theoretical calculations of imaging performance across a broad range of kVp, filter material type, and filter thickness for direct and indirect-detection flat-panel imagers. The calculations reveal a number of nontrivial effects in the energy response of such detectors that may not have been guessed from simple K-edge filter techniques, and point to a variety of compelling hypotheses regarding choice of beam filtration that warrant future investigation. (C) 2004 American Association of Physicists in Medicine.