在第一个临床光子计数计算机断层扫描仪上没有检测到加多K边缘
Erik Baubeta1,2, Eva Laurin Gadsböll1, Leon Will1
1Department of Imaging and Functional Medicine, Skåne University Hospital, Lund, Sweden.
Journal of applied clinical medical physics
|March 12, 2024
概括
加多对比剂在光子计数计算机断层扫描 (PCCT) 中由于衰减水平不足而具有有限的效用. 目前的技术表明,加多不是CT成像中的可行替代品.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 生物医学工程 生物医学工程
背景情况:
- 光子计数计算机断层扫描 (PCCT) 在图像质量和光谱信息方面提供了潜在的进步.
- 基于的对比剂是计算机断层扫描 (CT) 的标准,但对替代品的研究仍在进行中.
- 加多对比剂在磁共振成像 (MRI) 中被广泛使用.
研究的目的:
- 在PCCT中评估基于加多的对比剂的疗效.
- 为了比较加多和对比剂在PCCT和能量集成CT (EICT) 中的衰减特性.
- 确定加多能否在CT应用中作为临床相关的替代对比剂.
主要方法:
- 使用PCCT和EICT扫描了CTDI幻影,其度的加多和对比度各不相同.
- 对于每个对比剂和度,在不同的单能水平上测量了衰减值.
- 进行了加多和之间的衰减曲线和K边缘检测的比较.
主要成果:
- 在PCCT中,加多在较低的keV (40-90keV) 达到>100HU,而 (>100HU在100-110keV) 在PCCT中达到>100HU,但需要更高的度来实现可比减弱.
- 在EICT中,与 (8.75 mg I/mL) 相比,加多需要更高的度 (10-25 mmol/L) 来达到>100 HU.
- 在PCCT或EICT中对加多没有观察到明显的K边缘,在人类批准的度下,临床相关的减弱水平几乎没有达到最低水平.
结论:
- 加多对比剂在第一个临床PCCT扫描仪上没有可检测的K边缘.
- 在人类使用批准的度下,加多几乎没有达到临床相关的衰减水平.
- 根据目前的PCCT技术,与相比,加多在计算机断层扫描中不被认为是临床上有用的对比剂.
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