Can dual-energy computed tomography improve visualization of hypoenhancing liver lesions in portal venous phase? Assessment of advanced image-based virtual monoenergetic images

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• 作者：Damiano Caruso^a ; ^b ; Carlo N. De Cecco^a ; U. Joseph Schoepf^a ; Amanda R. Schaefer^c ; Parker W. Leland^c ; Dustin Johnson^c ; Andrea Laghi^b ; Andrew D. Hardie^c ; ^{andrewdhardie@gmail.com}
• 关键词：DECT ; Dual Energy CT ; LB ; linear blending with the appearance of traditional single-energy CT ; VMI ; standard virtual monoenergetic images ; VMI+ ; advanced image-based virtual monoenergetic images ; PVP ; portal venous phase
• 刊名：Clinical Imaging
• 出版年：2017
• 出版时间：January-February 2017
• 年：2017
• 卷：41
• 期：Complete
• 页码：118-124
• 全文大小：813 K
• 卷排序：41

文摘

The purpose was to assess image quality of portal-venous phase dual-energy computed tomography (DECT) for liver lesions.MethodsWe 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.ResultsLiver 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.ConclusionsDECT 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.