Virtual Unenhanced Images
Virtual Unenhanced Images
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虚拟未增强图像
DOI：
10.1097/rli.0000000000000802
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发表时间：
2022
影响因子：
6.7
通讯作者：
Kambadakone A
中科院分区：
文献类型：
--
作者：
Lennartz S;Pisuchpen N;Parakh A;Baliyan V;Sahani D;Hahn PF;Kambadakone A
目的本研究的目的是比较双源双能量计算机断层扫描（dsDECT）、快速千伏开关DECT（rsDECT）和双层探测器DECT（dlDECT）使用患者和体模数据。本回顾性研究包括3种DECT扫描仪类型的增强腹部检查和使用相同协议扫描的体模。对VUE图像进行定性和定量评估。定量评价包括测量各种组织和体模的衰减和图像噪声。比较了不同类型扫描仪的虚拟非增强图像衰减和噪声，并将虚拟非增强图像衰减的患者内扫描仪间再现性计算为扫描仪间差异≤ 10 HU的测量对的百分比。图像质量，噪声，清晰度和碘消除进行了评估，定性由2 radiologist.ResultsSignificant interscanner差异VUE衰减和噪声中发现在所有组织。dlDECT和rsDECT在主动脉、门静脉和肾脏的VUE衰减明显高于dsDECT（P< 0.05）。相反，皮下和腹膜后脂肪的dsDECT VUE衰减显著高于dlDECT/rsDECT（均P< 0.05）。rsDECT和dlDECT之间共有91.9%（385/419）的测量结果可重复，dsDECT和rsDECT之间有70.9%（297/419），dsDECT和dlDECT之间有66.8%（280/419）。在dlDECT、rsDECT和dsDECT中，造影剂填充体模腔中的虚拟未增强图像衰减分别为12.7±4.7 HU、− 5.3±4.2 HU和− 4.0±10.7 HU，dlDECT和rsDECT/dsDECT之间的差异具有显著性（P< 0.05），而在未增强腔外体模组件中的衰减具有可比性（P= 0.11-0.62）。质量，dsDECT产生最好的碘消除，而清晰度，图像噪声，整体图像质量被评为更高的dlDECT和rsDECT.ConclusionsThere是显着的衰减测量和定性评估VUE图像，这应该承认使用这些图像的患者正在扫描不同的DECT扫描仪类型在成像随访时，扫描扫描器间的差异。
ObjectivesThe aim of this study was to compare qualitative and quantitative metrics of virtual unenhanced (VUE) images among dual-source dual-energy computed tomography (dsDECT), rapid kV-switching DECT (rsDECT), and dual-layer detector DECT (dlDECT) using patient and phantom data.Materials and MethodsForty-four patients with clinical contrast-enhanced abdominal examinations on each of the 3 DECT scanner types and a phantom scanned with the same protocols were included in this retrospective study. Qualitative and quantitative assessment was performed on VUE images. Quantitative evaluation included measurement of attenuation and image noise for various tissues and the phantom. Virtual unenhanced image attenuation and noise were compared between scanner types, and intrapatient interscanner reproducibility of virtual unenhanced image attenuation was calculated as the percentage of measurement pairs with an interscanner difference≤ 10 HU. Image quality, noise, sharpness, and iodine elimination were assessed qualitatively by 2 radiologists.ResultsSignificant interscanner differences in VUE attenuation and noise were found in all tissues. dlDECT and rsDECT showed significantly higher VUE attenuation than dsDECT in the aorta, portal vein, and kidneys (P< 0.05). Conversely, VUE attenuation in dsDECT was significantly higher than in dlDECT/rsDECT for subcutaneous and retroperitoneal fat (both P< 0.05). A total of 91.9%(385/419) of measurements were reproducible between rsDECT and dlDECT, 70.9%(297/419) between dsDECT and rsDECT, and 66.8%(280/419) between dsDECT and dlDECT. Virtual unenhanced image attenuation in the contrast media–filled phantom cavity was 12.7±4.7 HU in dlDECT,− 5.3±4.2 HU in rsDECT, and− 4.0±10.7 HU in dsDECT with significant differences between dlDECT and rsDECT/dsDECT, respectively (P< 0.05), between which attenuation was comparable in the unenhanced extraluminal phantom component (P= 0.11–0.62). Qualitatively, dsDECT yielded best iodine elimination, whereas sharpness, image noise, and overall image quality were rated higher in dlDECT and rsDECT.ConclusionsThere are significant interscanner differences in the attenuation measurements and qualitative assessment of VUE images, which should be acknowledged when using these images in patients that are being scanned on different DECT scanner types during imaging follow-up.
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DOI：
--
发表时间：
2007
期刊：
The New England journal of medicine
影响因子：
--
作者：
W. Young
通讯作者：
W. Young
影响因子：
2.4
作者：
Hokamp, N. Grosse;Hoeink, A. J.;Haneder, S.
通讯作者：
Haneder, S.
用于表征偶然肾上腺肿块的双能 CT：初步观察。
DOI：
10.2214/ajr.11.6957
发表时间：
2012
期刊：
AJR. American journal of roentgenology
影响因子：
--
作者：
R. Gnannt;M. Fischer;R. Goetti;C. Karlo;S. Leschka;H. Alkadhi
通讯作者：
H. Alkadhi
影响因子：
5
作者：
Mileto, Achille;Allen, Brian C.;Morgan, Desiree E.
通讯作者：
Morgan, Desiree E.
肾上腺病变：CT 扫描仪之间的衰减测量差异。
影响因子：
19.7
作者：
P. Hahn;M. Blake;G. Boland
通讯作者：
G. Boland