方法

我们回顾性回顾了2018年5月至2019年9月期间使用LED内镜系统（富士胶片公司）观察到的272个病灶。日本NBI分型适用于肿瘤特征描述。我们分析了诊断准确性和置信水平。我们还分析了用LED和激光内镜观察到的61个病灶，以比较诊断准确性。对于肿瘤的可检测性，我们计算了每个肿瘤在两种内镜系统的白光、BLI和LCI图像的色差值（CDVs）和亮度值（BVs）。

Methods: We retrospectively reviewed 272 lesions observed using the LED endoscopic system (Fujifilm Co., Tokyo, Japan) from May 2018 to September 2019. The Japanese NBI Classification was used for tumor characterization. We analyzed the diagnostic accuracy and confidence level. Sixty-one lesions observed with both the LED and magnified LASER endoscopes were also analyzed to compare the diagnostic accuracy. Regarding the tumor detectability, we calculated color difference values (CDVs) and brightness values (BVs) of white-light imaging, BLI, and LCI modes between the two endoscopes for each tumor. 

结果

平均息肉大小为9.2 ± 11.3 mm。组织学特征显示71个无蒂锯齿状病变，193个腺瘤和高度不典型增生，以及8个T1期癌。≥ 10 和 < 10 mm肿瘤的诊断准确率分别为72.0%和92.9%（p < 0.001），高置信度为93.8%。LED的诊断准确率（77%）略高于没有带放大功能的激光（65.6%, p = 0.16），但不逊于带放大功能的激光（82.0%, p = 0.50）。LED和激光内镜的LCI（p = 0.30）的CDVs分别为20.6 ± 11.2 和21.6 ± 11.2（p < 0.001）。

Results: The mean polyp size was 9.2 ± 11.3 mm. Histology showed 71 sessile serrated lesions, 193 adenoma and high-grade dysplasias, and 8 T1 cancers. The diagnostic accuracy of tumors ≥ 10 and < 10 mm was 72.0% and 92.9% (p < 0.001), respectively and the high confidence rate was 93.8%. The diagnostic accuracy of LED (77.0%) was a little higher than that of LASER without magnification (65.6%, p = 0.16) but was not inferior to that of LASER with magnification (82.0%, p = 0.50). The respective CDVs of LED and LASER endoscopes were 20.6 ± 11.2 and 21.6 ± 11.2 for LCI (p = 0.30), and the respective BVs were 210.0 ± 24.2 and 175.9 ± 21.1 (p < 0.001).