Accuracy of Quantification of Iodine and Hounsfield Unit Values on Virtual Monochromatic Imaging Using Dual-Energy Computed Tomography
Accuracy of Quantification of Iodine and Hounsfield Unit Values on Virtual Monochromatic Imaging Using Dual-Energy Computed Tomography
复制标题
双能计算机断层扫描虚拟单色成像中碘和亨斯菲尔德单位值定量的准确性
DOI：
10.1097/rct.0000000000000798
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发表时间：
2018
影响因子：
1.3
通讯作者：
Teshima Teruki
中科院分区：
文献类型：
--
作者：
Washio Hayate;Ohira Shingo;Karino Tsukasa;Nitta Yuya;Hayashi Masaaki;Miyazaki Masayoshi;Teshima Teruki
目的比较双层计算机断层扫描(DLCT)和快速千伏开关计算机断层扫描(FKSCT)在虚拟单色成像(VMI)上定量测量碘和Hounsfield单位(HU)值的准确性。材料和方法使用16根代表不同材料(碘、钙、血液和脂肪组织)的不同尺寸和浓度的体模。比较DLCT和FKSCT在50、70和100keV时测量碘浓度和VMI的HU值的绝对百分比误差(测量误差与真碘浓度的绝对比率)。结果DLCT测定VMI的绝对百分比误差小于FKSCT。结论DLCT测定碘和HU值的准确性高于FKSCT。
ObjectiveThe aim of the study was to compare the accuracy of quantification of iodine and Hounsfield unit (HU) values on virtual monochromatic imaging (VMI) using dual-layer computed tomography (DLCT) and fast kilovolt-switching computed tomography (FKSCT).Materials and MethodsThis study was performed in 2 phantoms (large and small) using 16 rods representing different materials (iodine, calcium, blood, and adipose tissue) with different dimensions and concentrations. The absolute percentage errors (absolute ratio of measurement error to true iodine concentration) for iodine concentration and HU value on VMI at 50, 70, and 100 keV were compared between DLCT and FKSCT. The Mann–Whitney U test was used to assess statistical significance.ResultsOverall, the absolute percentage errors for iodine concentration and HU value on VMI were smaller for DLCT than for FKSCT.ConclusionsOverall, the accuracy of iodine and HU values was higher for DLCT than for FKSCT.