光子计数计算机断层扫描用于评估卷曲的内动脉瘤
B Mac Grory1, Amanda Randles1, David M Urick1
1From the Department of Neurology (BMG, DH), Biomedical Engineering (BMG, AR, DH, EDC), Radiology (DMU, EDC), and Neurosurgery (DH), the Center for Computational and Digital Health Innovation (BMG, AR, DH, and EDC), and the Duke Clinical Research Institute (BMG), Duke University, Durham, NC, USA, and the Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA (FRS).
使用虚拟单能图像和金属工件减少的光子计数CT (PCCT) 提供了治疗内动脉瘤的优秀可视化. 这种技术为动脉瘤监测提供了侵入性数字减去血管学的一个有希望的替代方案.
科学领域:
- 医疗成像医学成像
- 神经外科 神经外科
- 放射学 放射学是一门学科.
背景情况:
- 内血管栓塞在内动脉瘤中很常见,但需要侵入性后续成像.
- 标准CT/MR血管造影通常由于栓塞装置的工件导致不满意的结果.
- 数字减去血管学是侵入性的,有风险的,昂贵的.
研究的目的:
- 为了优化光子计数CT (PCCT) 参数用于成像治疗的内动脉瘤.
- 评估PCCT克服栓塞装置的文物的能力.
- 为了确定动脉瘤可视化的最佳PCCT协议.
主要方法:
- 使用治疗内动脉瘤 (线圈和WEB栓塞) 的人类模型的幻影研究.
- 使用传统的集能CT (EICT) 和PCCT扫描仪进行采集.
- 图像和重建参数的变化,包括西门子iMAR算法应用.
- 对比度与噪声比率 (CNR) 和金属工件大小的定量分析.
主要成果:
- 通过55keV虚拟单能图像 (VMIs) 结合iMAR实现最佳可视化.
- 55 keV VMI 显示了邻近血管系统中最低的金属工件和最高的 CNR.
- 应用iMAR显著增加了与栓塞材料相邻的血管中的CNR.
结论:
- 带有iMar的PCCT衍生VMI提供了治疗动脉瘤和血管系统的优秀可视化.
- 这种技术显示了在患者中初步临床应用的可行性.
- PCCT为动脉瘤监测提供了一个潜在的非侵入性替代方案.
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