双能CT能谱曲线特征对体内上尿路钙结石亚型的初步研究  

Monochromatic curve features characterization for sub-differentiation of upper urinary calcium calculi in vivo on dual-energy CT：a pilot study

作　　者：王茸 徐香玖[1] 黄刚[1] 周星[1] 李元[1] 王向荣[1] 张丽 龙晓宙[1] 

机构地区：[1]甘肃省人民医院放射科,甘肃兰州730000

出　　处：《实用放射学杂志》2018年第1期101-104,共4页Journal of Practical Radiology

基　　金：国家自然科学基金项目（81560295）.

摘　　要：目的 探讨双能CT（DECT）能谱曲线特征参数区分体内上尿路钙结石亚型的价值.方法 以红外光谱分析结果作为金标准,共纳入55例钙结石,结石离体前均行双源DECT检查,分为4组：组1（一水草酸钙,12例）,组2（一水草酸钙＋二水草酸钙,9例）,组3（一水草酸钙＋碳酸磷灰石,8例）,组4（一水草酸钙＋二水草酸钙＋碳酸磷灰石,26例）.通过获得的单能量CT 值（40~190 keV,间隔10 keV）及能谱曲线的斜率对不同类型的钙结石进行分析.结果 4组比较时,不同的单能量CT值及曲线斜率均有统计学差异.两两比较时,110 keV区分的组数最多;组1和组2、组3,组2和组4,组3和组4的能谱曲线斜率有统计学差异.结论双源DECT成像技术获得的能谱曲线特征参数有助于区别不同类型的钙结石.Objective To investigate the value of monochromatic curve features parameters in assessing various types of upper urinary calcium calculi in vivo on dual-energy CT（DECT）.Methods Total 55 calcium calculi underwent dual-source CT in dual-energy mode were analyzed retrospectively.According to the result of infrared spectrometer,four types of calcium calculi were seen in this study：group 1（COM,12）,group 2（COM＋COD,9）,group 3（COM＋CaP,8）,group 4（COM＋COD＋CaP,26）.For each stone,mono-chromatic images from 40 keV to 190 keV（interval of 10 keV）were reconstructed.We used the different single spectral CT values and curve slope to differentiate of various types of calcium calculi.Results The parameters of the different single spectral CT values and curve slope were significantly different among the four groups.110 keV could differentiate the most groups.The curve slopes of group 1 with group 2 and group 3,group 2 with group 4,group 3 with group 4 were significantly different.Conclusion The spectral curve features parameters is helpful in the characterization of various types of calcium calculi.

关 键 词：泌尿系结石 能谱曲线 计算机体层成像 

分 类 号：R691.4[医药卫生—泌尿科学] R814.42[医药卫生—外科学]