窄带成像技术在早期胃癌内镜诊断中的应用

目的探讨窄带成像（NBI）技术对早期胃癌的诊断价值。方法46例常规内镜发现病灶者，分别于放大内镜下行NBI及靛胭脂染色，观察黏膜腺管形态及微血管结构变化，计算清晰度评分；评价病变性质并与术后病理检查结果进行比较。结果NBI与靛胭脂染色腺管结构清晰度评分无显著差异，但微血管结构评分前者明显高于后者，P〈0．05。二者诊断早期胃癌的敏感性、特异性及与病理诊断的符合率无明显差异。结论NBI诊断早期胃癌效果确切，其优点为能清晰显示病灶微血管结构变化，从而提高诊断的精确性。

Application of narrow Band Imaging technique in the chromoendoscopy diagnosis of early gastric cancer

Objective To investigate the value of narrow band imaging technique（NBIT） in the diagnosis of early gastric cancer. Methods 46 cases which had been detected suspicious lesions by conventional endoscopic examination were treated with NBIT and chromoendoscopy respectively. Structure of mucosal pit pattern and micrangium were observed by magnifying endoslopy, desfinition scores were caleulated. Comparisons were made between NB1T and chromoendoseopy by reference to histopathology. Results There were no significant difference in the socre of mucosal pit pateern, but the score of micrangium structure got by NBIT were higher. There were no difference in the diagnostic sensitivity, specifietiy and accuraty between the two methods. Conclusion NBIT is helpful and useful for the diagnosis of early gastric cancer, advantages of which is that it can show the changes of micrangium clearly, so as to improve the diagnostic accuracy.