放大肠镜(magnifying colonoscopy)：1975年,日本多田等对普通大肠镜进行改造,现在新型的放大肠镜都为可变焦肠镜，放大至lO0倍的肠镜足以满足区别微细结钩的变化。
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结论术前应用放大肠镜或超声肠镜检查对早期结直肠癌诊断率高；
Conclusions The diagnostic accuracy of magnification and ultrasound colonoscope for early colorectal carcinoma is high.
目的探讨染色放大肠镜进展征象对判断组织病理学“进展型”大肠腺瘤的价值。
Objective To compare the detection rates of colorectal adenomas by conventional colonoscopy, chromo colonoscopy and chromo magnifying colonoscopy.
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