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一种新型Micro-CT系统设计

A Novel Design of Micro-CT System

摘要: 传统的 CT 设备由于受到系统架构的物理限制,导致最终扫描结果中运动伪影影响很大,本文依据碳纳米管的场致发射原理设计出一套工作在准静态模式下的显微CT。该系统采用 35 个碳纳米管 X 射线光源和 5 个探测器,相对于传统 CT,通过外部时序控制减少了机架的机械旋转次数和行程,大大降低了运动伪影的影响。由于重建角度是稀疏的,因此通过采用迭代重建算法模拟仿真验证了该系统的有效性。

Abstract: Limited to the system architecture in conventional CT, Artifacts induced by respiratory motion during routine diagnosis severely degrades the image quality. A novel micro-CT system performing well in a quasi-static way is proposed according to the principle of field emission. It employs 35 carbon nanotubes based x-ray tubes and 5 flat detectors, motion artifacts can be greatly suppressed by reducing the gantry rotation times and range under the control of the external sequential when compared with conventional CT system. To validate the feasibility of the proposed system, iterative reconstruction algorithm is adopted on simulation due to sparse sampling .

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[V1] 2018-03-15 14:54:46 ChinaXiv:201803.00584V1 下载全文
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