CAJ | 학술논문

目的：探讨CT能谱成像最佳 keV单能量图像及能谱曲线在胃癌术前 T分期中的应用价值。方法前瞻性地收集经胃镜活检确诊为胃癌的患者52例,术前采用CT增强能谱扫描,2名观察者分别独立分析混合能量图像及单能量图像并进行 T 分期,以术后病理分期作为金标准,比较二者在胃癌术前 T 分期中的准确率及观察者间一致性。结果 CT 能谱成像对胃癌术前 T分期的准确率(82.69%,43/52)较混合能量图像(71.15%,37/52)显著提高(P=0.031)。CT能谱成像胃癌术前T分期观察者间一致性(Kappa=0.768)优于混合能量图像(Kappa=0.562)。结论 CT能谱成像最佳 keV单能量图像及能谱曲线有助于提高胃癌术前T分期的准确率。
목적：탐토CT능보성상최가 keV단능량도상급능보곡선재위암술전 T분기중적응용개치。방법전첨성지수집경위경활검학진위위암적환자52례,술전채용CT증강능보소묘,2명관찰자분별독립분석혼합능량도상급단능량도상병진행 T 분기,이술후병리분기작위금표준,비교이자재위암술전 T 분기중적준학솔급관찰자간일치성。결과 CT 능보성상대위암술전 T분기적준학솔(82.69%,43/52)교혼합능량도상(71.15%,37/52)현저제고(P=0.031)。CT능보성상위암술전T분기관찰자간일치성(Kappa=0.768)우우혼합능량도상(Kappa=0.562)。결론 CT능보성상최가 keV단능량도상급능보곡선유조우제고위암술전T분기적준학솔。
Objective To evaluate the application of CT spectral imaging,best keV monochromatic images and spectral curves,in preoperative T staging of gastric cancer.Methods Fifty-two patients with gastroscopically confirmed gastric cancer were included prospectively and underwent preoperative contrast enhanced CT spectral imaging.Two radiologists read poly-and monochromatic CT images of 52 patients and assessed T staging independently.With the reference of postoperative histopathological findings,T staging accuracy and interobserver agreement were compared between poly-and monochromatic CT images.Results Preoperative T staging accuracy of gastric cancer by spectral imaging (82.69%,43/52)was significantly higher than that of polychromatic CT images (71.15%,37/52)(P=0.031).Interobserver agreement (Kappavalue)was improved from 0.562(polychromatic CT images)to 0.768 (spectral imaging).Conclusion CT spectral imaging,best keV monochromatic images and spectral curves,can improve preoperative T stag-ing accuracy of gastric cancer.