Caruso Damiano, De Cecco Carlo N, Schoepf U Joseph, Schaefer Amanda R, Leland Parker W, Johnson Dustin, Laghi Andrea, Hardie Andrew D
Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, 25 Courtenay Drive, Charleston, SC 29425; Department of Radiological Sciences, Oncological and Pathological Sciences University of Rome "Sapienza", via Franco Faggiana 1668, 04100 Latina, Italy.
Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, 25 Courtenay Drive, Charleston, SC 29425.
Clin Imaging. 2017 Jan-Feb;41:118-124. doi: 10.1016/j.clinimag.2016.10.015. Epub 2016 Oct 19.
The purpose was to assess image quality of portal-venous phase dual-energy computed tomography (DECT) for liver lesions.
We performed 120-kVp-equivalent linear-blended (LB) and monoenergetic reconstructions from 40 to 190 keV by standard (VMI) and advanced virtual monoenergetic (VMI+) methods. Diagnostic performance, and quantitative and qualitative image analyses were assessed and compared.
Liver contrast to noise ratio peaked at 40 keV_VMI+, while image quality and reader preference peaked at 50 keV_VMI+. 50 keV_VMI+ scored overall higher diagnostic performance: lesion sensitivity 95.4% vs. 83.3% for both 75 keV_VMI and LB.
DECT improves assessment of hypoenhancing liver lesions on portal venous phase. 50 keV_VMI+ demonstrated the highest image quality and diagnostic performance over VMI and LB.
评估门静脉期双能计算机断层扫描（DECT）对肝脏病变的图像质量。
我们通过标准（VMI）和先进的虚拟单能（VMI+）方法，从40至190keV进行了等效于120kVp的线性混合（LB）和单能重建。对诊断性能以及定量和定性图像分析进行了评估和比较。
肝脏对比噪声比在40keV_VMI+时达到峰值，而图像质量和阅片者偏好度在50keV_VMI+时达到峰值。50keV_VMI+在总体诊断性能上得分更高：病变敏感度为95.4%，而75keV_VMI和LB的病变敏感度均为83.3%。
DECT改善了门静脉期对肝脏低强化病变的评估。与VMI和LB相比，50keV_VMI+显示出最高的图像质量和诊断性能。
