霍恩斯菲尔德秤
医学
核医学
碘
断层摄影术
计算机断层摄影术
双层
单色
生物医学工程
放射科
材料科学
光学
图层(电子)
物理
复合材料
冶金
作者
Masahiko Koike,Shingo Ohira,Tsukasa Karino,Yuya Nitta,Masaaki Hayashi,Michihiko Miyazaki,Teruki Teshima
出处
期刊:Journal of Computer Assisted Tomography
[Ovid Technologies (Wolters Kluwer)]
日期:2018-11-01
卷期号:42 (6): 965-971
被引量:16
标识
DOI:10.1097/rct.0000000000000798
摘要
Objective The 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 Methods This 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. Results Overall, the absolute percentage errors for iodine concentration and HU value on VMI were smaller for DLCT than for FKSCT. Conclusions Overall, the accuracy of iodine and HU values was higher for DLCT than for FKSCT.
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