宝石能谱CT在胃癌术前分型及分期中的应用价值

目的 探讨宝石能谱CT在胃癌术前分型及分期中的应用价值.方法 选择87例胃癌患者,对其影像学资料及病例资料进行回顾性分析.考察不同分型患者能谱参数,对混合能量图像与能谱成像的T分期准确率进行比较.结果 动脉期、静脉期及实质期碘浓度以管状腺癌最高,粘液腺癌最低,组间差异有统计学意义(P＜0.05).三组患者3个时期水浓度比较差异不显著(P＞0.05).混合能量图像诊断胃癌T分期总准确率为68.97％(60/87),T1～T4分期诊断准确率分别为94.25％,83.91％,77.01％以及82.76％.能谱成像诊断胃癌T分期总准确率为82.76％(72/87),T1～T4分期诊断准确率分别为97.70％,90.80％,86.21％以及90.80％.混合能量图像诊断胃癌T分期总准确率明显低于能谱成像,差异有统计学意义(P＜0.05).而对T1～ T4各期的诊断准确率两组差异均不显著(P＞0.05).结论 宝石能谱CT对于胃癌术前分型及分期均具有重要的应用价值.

The Application Value of Gemstone Spectral Imaging for Preoperative Pathological Types and Stages of Gastric Cancer

Objective To explore the application value of gemstone spectral imaging (GSI) for preoperative pathological types and stages of gastric cancer.Methods 87 gastric cancer patients were selected in this study,and their imaging data was retrospectively analyzed.The parameters of GSI of different types were analyzed,and the accuracy of T stage detection of mixing energy image and spectral image were compared.Results The iodide concentration of arterial phase,venous phase and substance phase of tubular adenocarcinoma were the highest,and mucinous adenocarcinoma was the lowest,which had statistically significance of 3 groups (P ＜ 0.05).The water concentration of 3 phases of 3 groups had no obvious difference (P ＞ 0.05).The total accuracy of T stage detection of mixing energy image was 68.97％ (60/87),T1 ～ T4 were 94.25％,83.91％,77.01％ and 82.76％,respectively.The total accuracy of T stage detection of spectral image was 82.76％ (72/87),T1 ～ T4 were 97.70％,90.80％,86.21％ and 90.80％,respectively.The total accuracy of mixing energy image was obviously lower than spectral image with statistically significance (P ＜ 0.05).But the accuracy of T1 ～ T4 detection of the 2 types of image had no statistically difference (P ＞ 0.05).Conclusion There is an important application value of GSI for preoperative pathological types and stages of gastric cancer.