Objective To explore the significance of precious stone energy spectrum CT imaging in diagnosis of tumors from different tis-sue sources and pathological types and metastatic lymph nodes. Methods A total of 60 patients with esophageal cancer,lung cancer or gastric cancer in this hospital during December 2013 to September 2015 were randomly selected as study group,and precious stone energy spectrum CT imaging had been applied for examination of primary lesions in patients with different tumor tissues,and metastatic lymph nodes as well as the ef-fective atomic sequence of metastatic lymph nodes,CT value and iodine content were tested and compared with related statistical analysis. Results In this study,the difference in CT values of characteristic spectrum parameters in different pathological types of carcinomas(small cell lung cancer,lung adenocarcinoma,lung squamous carcinoma,gastric cancer,esophageal cancer and their metastasis in lymph nodes)was statistically significant( P 0. 05). Conclusion The ap-plication of precious stones energy spectrum CT imaging has certain significance in diagnosis of tumors with different tissue sources,pathological types and metastasis in lymph nodes.%目的：针对宝石能谱 CT 成像在不同组织来源、病理类型肿瘤及其转移淋巴结中的诊断价值进行研究。方法随机选择2013年12月至2015年9月期间收治的食管癌、胃癌、肺癌患者60例，作为本次研究的对象，采用宝石能谱 CT 成像技术对不同肿瘤组织的原发病灶、淋巴结转移、以及转移淋巴结中的有效原子序数、Ct 值、碘基含量等进行检测，并进行相关的统计比较。结果不同病理类型以及原病灶淋巴结转移（小细胞肺癌、肺腺癌、肺鳞癌、小细胞肺癌转移淋巴结、肺腺癌转移淋巴结、肺鳞癌转移淋巴结、胃癌-食管癌转移淋巴结）的 CT 能谱特征参数值存在着统计学差异（ P 0.05）。结论宝石能谱 CT 成像技术，在不同组织来源、病理类型肿瘤及其转移淋巴结的诊断中，有一定的临床诊断价值。
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