Quantitative Determination of a Contrast Agent by Multispiral Computed Tomography and Targeted Absorption Spectroscopy in the K-Jump Region of X-Ray Photoabsorption
A. G. Turyanskiy, T. A. Akhadov, Kyaw Zaw Lin, V. M. Senkov, M. Z. Ziyatdinova, M. V. Ublinskii, D. M. Dmitrienko, M. Yu. Kupriyanov, M. M. Aksenova
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Abstract
We demonstrate a possibility of a radical reduction in an effective radiation dose when monitoring the content of a contrast agent in an object with X-ray absorption spectroscopy (XAS) using survey data from multispiral computed tomography (CT). A directional beam passes through the region of interest, the 3D coordinates of which are determined with CT, and the transmission spectrum is recorded in the range of the K-jump in the X-ray photoabsorption of the contrast agent. The unambiguity of the obtained results is confirmed by independent measurements of the xenon content in the phantom using CT and XAS methods, as well as by direct manometric control of gas volumes.
摘要 我们展示了利用多螺旋计算机断层扫描（CT）的勘测数据，通过 X 射线吸收光谱（XAS）监测物体中造影剂含量时，从根本上减少有效辐射剂量的可能性。定向光束穿过相关区域（其三维坐标由 CT 确定），在造影剂的 X 射线光吸收 K 跳变范围内记录透射光谱。通过使用 CT 和 XAS 方法对模型中的氙含量进行独立测量，以及对气体体积进行直接人工控制，都证实了所获得结果的准确性。
期刊介绍：
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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