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双能计算断层扫描 (DECT) 多色和单色图像的比较,在牙科植入物患者中使用或不使用代金属工件减少算法

Shiqi Huang¹, Yuhong Liang¹, Xinqun Yao¹

¹Department of Radiology, Liuzhou Municipal Liutie Central Hospital, Liuzhou, China.

Quantitative imaging in medicine and surgery

|July 18, 2024

概括

具有代金属工件减少的双能量CT有效地减少了牙科植入物中的工件. 将iMAR与特定的DECT多色和单色设置相结合,可以优化图像质量和减少文物,无论植入物大小如何.

科学领域:

放射学放射学是一门学科.
医疗成像医学成像
图像处理图像处理

背景情况:

双能计算断层扫描 (DECT) 和代金属工件减少 (iMAR) 是缓解金属工件的关键.
优化DECT参数和iMAR应用对于人工物减少性能至关重要.
这项研究研究了在牙科植入物患者中使用和不使用iMAR的DECT图像质量.

研究的目的:

为了比较各种DECT多色和单色图像设置与iMAR相结合的有效性,以减少金属文物.
评估不同DECT参数和iMAR对牙科植入物存在时主观和客观图像质量的影响.
评估植入物大小是否影响DECT和iMAR技术的性能.

主要方法:

30名牙科植入体患者接受了DECT头部和部成像.
产生了20个图像集:DECT多色 (各种混合比) 和DECT单色 (90-170 keV),带有和没有iMAR.
进行了主观 (利克尔特尺度) 和客观 (CT衰减,SD,CNR,AI) 分析,包括按植入物大小进行子组分析.

主要成果:

与DE多色相结合的iMAR (-0.3) 显示了最低的工件分数 (主观).
iMAR与DE单色 (110 keV) 相结合,产生了最好的图像质量得分 (主观).
iMAR + DE 多色 (0) 显示了最低的工件指数 (目标); CNR 变化,植入物大小没有显著影响 iMAR 性能.

结论:

iMAR与DE多色 (-0.3,0) 和DE单色 (110 keV) 设置相结合,可显著提高图像质量并减少金属工件.
这些优化的DECT和iMAR组合可大幅减少金属工件.
使用DECT进行iMAR的有效性与牙植入物大小无关.

关键词:

计算机断层扫描 (CT) 扫描文物文物文物牙植入物是指牙植入物.双重能源 (DE) 是指双重的能源.

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