光纤拉曼内窥探头可有效鉴别胃癌组织

Application of fiber Raman endoscopic probe in the diagnosis of gastric cancer

目的研发可加载于胃镜系统的光纤拉曼内窥探头,评估其鉴别胃癌组织的能力。方法分别利用共聚焦显微拉曼光谱仪、光纤拉曼内窥探头获取正常胃黏膜组织和胃癌组织的拉曼光谱,对光谱数据进行平滑、消除基线和归一化处理后,利用线性判别进行鉴别分析,以病理学诊断结果作为金标准,从准确率、灵敏度、特异性来评价光纤拉曼内窥探头的诊断效能。结果光纤拉曼内窥探头能够采集到不同胃黏膜组织的典型的拉曼光谱;正常胃粘膜组织和癌变组织的拉曼光谱存在显著差异,光纤拉曼内窥探头能够鉴别出正常胃黏膜组织和胃癌组织的拉曼光谱,灵敏度、特异性和准确率分别为80.56%、88.89%、84.72%。结论光纤拉曼内窥探头可获取丰富的胃黏膜组织拉曼光谱,结合线性判别能够快速、有效地鉴别胃癌组织,具有较好的临床应用潜力。

Objective To develop a fiber Raman endoscopic probe that can be integrated in a gastroscope and evaluate its value in the diagnosis of gastric cancer. Methods The Raman spectra of gastric cancer tissues and normal tissues were obtained using the fiber Raman endoscopic probe and confocal microRaman spectroscopy. After preprocessing with smoothing, baseline elimination and normalization, the spectroscopic data were analyzed by the principle component analyses combined with stechiometry. Based on the pathological results, the diagnostic accuracy, sensitiveness and specificity of Raman spectroscopy combined with stechiometry were evaluated. Results The fiber Raman endoscopic probe and microRaman spectroscopy revealed significantly different Raman spectra between gastric cancer tissues and normal tissues. The diagnostic accuracy,sensitiveness and specificity of the fiber Raman endoscopic probe was 80.56%, 88.89%, and 84.72% for gastric cancer,respectively. Conclusion The fiber Raman endoscopic probe combined with stechiometry provides an effective modality for the diagnosis of gastric cancer and can well distinguish gastric cancer tissue from normal gastric tissues.