Measurement of temporal resolution in dual source CT
Measurement of temporal resolution in dual source CT
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DOI：
10.1118/1.2826559
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发表时间：
2008-02-01
期刊：
影响因子：
3.8
通讯作者：
Flohr, Thomas G.
中科院分区：
文献类型：
--
作者：
McCollough, Cynthia H.;Schmidt, Bernhard;Flohr, Thomas G.
这项工作评估的时间分辨率的双源计算机断层扫描（CT）在视觉上直观的方式。利用环形伪影产生的原理，以与机架相同的速度旋转包含高度衰减delta函数信号（导丝）的体模，产生部分环形伪影，其中伪影的角范围提供时间分辨率的直接指示。使用患者数据证明了评价的165和83 ms标称时间分辨率对心脏CT中运动伪影的影响。(C)2008年美国医学物理学家协会。
This work assesses the temporal resolution of dual-source computed tomography (CT) in a visually intuitive manner. Exploiting the principles of ring artifact creation, a phantom containing a highly attenuating delta function signal (a wire) was rotated at the same speed as the gantry, creating a partial ring artifact where the angular extent of the artifact provides a direct indication of the temporal resolution. A demonstration of the effect of the evaluated 165 and 83 ms nominal temporal resolutions on motion artifacts in cardiac CT is provided using patient data. (C) 2008 American Association of Physicists in Medicine.