目的研究MSCT对胃癌转移性淋 巴结影像诊断，并与术后病理结果进行对 照分析，为临床诊治提供理论参照。方法 选用对照研究的方式对2012年6月-2014年 9月住院部收治的200例胃癌患者进行研 究，所有患者均接受多层螺旋CT（MSCT） 扫描检查，对其淋巴结的数目、直径和 强化程度等进行观察分析，并与术后病 检结果进行对照，以评价MSCT检查的优 劣。结果 MSCT检查根据淋巴结直径的3个 标准，检出率分别为23.91%、66.14%和 9.95%；以强化程度的3个标准，检出率分 别为26.98%、62.14%和10.88%与术后病 理结果对比，组间数据无明显差异（P＞ 0.05）。其诊断的灵敏度为90.94%、准确 性为92.74%、特异性为95.64%；与术后 病理结果相比χ2=9.38、7.22、4.06，P ＜0.05组间比较存在显著统计学差异。结 论 ①MSCT在对胃癌转移性淋巴结进行影 像判定检查时不同标准下的显示率不同； ②MSCT对胃癌转移性淋巴结的扫描检查时 具有特异影像学表现，临床诊断价值较 高；③术前检查结果可作为临床诊疗方案 的理论依据，具有重要的指导意义。

Objective This paper is to investigate the diagnosis of MSCT on metastatic gastric cancer lymph node image, to conduct the contrast analysis with postoperative pathological results, and to provide theoretical reference for clinical diagnosis and treatment. Methods The method of controlled research was applied to conduct researches on 200 patients with gastric cancer admitted by the impatient department of the Hospital from June, 2012 to September, 2014, all patients were subject to multi-slice CT (MSCT) scanning examination, the number of lymph nodes, diameter and reinforcement degree were subject to the observation and analysis, and postoperative disease examination results were compared to evaluate the pros and cons of MSCT examination. Results The detection rate of MSCT examination hit 23.91%, 66.14% and 9.95% respectively according to three criterions for diameters of lymph nodes. The detection rate of reinforcement degrees hit 26.98%, 62.14% and 10.88% respectively, and there were not significant differences in inter-group data when compared to postoperative pathological results (P>0.05). Diagnostic sensitivity, accuracy and specificity hit 90.94%, 92.74% and 95.64% respective, and X2 =9.38, 7.22 and 4.06 were respectively satisfied when compared with postoperative pathological results (P<0.05). The inter-group differences were statistically significant. Conclusions (1) The visualization rate varies under different criterions when MSCT is applied to conduct the image determination and examination on metastatic gastric cancer lymph nodes. (2) MSCT imposes specific imaging manifestations on gastric cancer metastatic lymph nodes when the scanning examination is applied, delivering high clinical diagnosis. (3) Preoperative examination results may be used as theoretical basis for clinical diagnosis and treatment plan, throwing important guiding significance.