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首页> 外文期刊>Journal of computer assisted tomography >Metal Artifact Reduction in Routine Chest and Abdominal Examinations Using Virtual Monoenergetic Images From Spectral Detector Computed Tomography
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Metal Artifact Reduction in Routine Chest and Abdominal Examinations Using Virtual Monoenergetic Images From Spectral Detector Computed Tomography

机译：使用虚拟单体凝视从光谱探测器计算机断层扫描的虚拟单体图像减少常规胸部和腹部检查的金属伪影

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Objective The objective of this study was to investigate the quantitative and qualitative effects of virtual monoenergetic images (VMIs) by spectral detector computed tomography (SDCT) on metal artifacts in routine examinations. Methods Fifty-nine patients with metal artifacts (caused by pacemakers, ports, screws, or prosthetic joints) affecting muscular tissue in the chest and/or abdomen were scanned using SDCT. Attenuation values around the metallic device were compared with contralateral unaffected values, for conventional images and 80 to 200 keV VMIs. In addition, general image quality and artifact intensity were rated by 2 readers. Results The VMIs significantly decreased metal artifact intensity in all patients (P < 0.05). In 39 patients (66.1%), the attenuation values of the artifact and the unaffected area on the optimal keV level were very similar (<= 5 Hounsfield unit difference). Qualitative analysis showed that high VMIs significantly improved artifact intensity, with best scores at 140 keV. Conclusions High monoenergetic images of SDCT significantly reduce metal artifacts, with optimal assessment at 140 keV.
机译：目的本研究的目的是通过常规检查中的金属伪像上的光谱探测器计算机断层扫描（SDCT）来研究虚拟单元素图像（VMIS）的定量和定性效果。方法使用SDCT扫描影响胸部和/或腹部的起搏器，港口，螺钉或假体关节的起搏器，壁板，螺钉或假体接头引起的50九十九个患者。将金属装置周围的衰减值与对侧不受影响的值进行比较，用于传统图像和80至200keV VMI。此外，一般图像质量和伪影强度被2个读者评定。结果VMIS在所有患者中显着降低了金属伪影强度（P <0.05）。在39名患者中（66.1％），伪影的衰减值和最佳KEV水平上的未受影响的区域非常相似（<= 5 Hounsfield单位差异）。定性分析表明，高VMIS显着改善了伪影强度，最佳分数在140 keV。结论SDCT的高单体图像显着减少了金属伪影，在140 kev时的最佳评估。

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