方法

根据水下浑浊度(透明或浑浊)对UEMR前三种模式检查的连续结直肠息肉图像进行分析。息肉与其周围环境之间的色差是通过国际照明委员会Lab颜色空间来计算的，其中三维颜色参数被表示出来。8名对组织学一无所知的评估者，在两种水下条件下给能见度打分，从1分(无法检测)到4分(容易检测)。比较颜色差异和可见性得分。

Methods: Images of consecutive colorectal polyps previously examined by these three modes before UEMR were analyzed according to the degree of underwater turbidity (transparent or cloudy). Color differences between the polyps and their surroundings were calculated using the Commission Internationale d'Eclairage Lab color space in which 3-D color parameters were expressed. Eight evaluators, who were blinded to the histology, scored the visibility from one (undetectable) to four (easily detectable) in both underwater conditions. The color differences and visibility scores were compared.

结果

73个息肉被评估。透明条件下息肉61个(腺瘤性44个，锯齿状17个)，浑浊条件下息肉12个(腺瘤性7个，锯齿状5个)。在透明条件下，BLI(8.5)和LCI(7.9)的色差显著高于WLI (5.7;P < 0.001)。可见性评分BLI(3.6)和LCI(3.4)也高于WLI (3.1;P < 0.0001)。在浑浊条件下，LCI(2.9)和WLI(2.7)的能见度评分显著高于BLI (2.2;P < 0.0001, P = 0.04)。  

Results: Seventy-three polyps were evaluated. Sixty-one polyps (44 adenomatous, 17 serrated) were observed under transparent conditions, and 12 polyps (seven adenomatous, five serrated) were observed under cloudy conditions. Under transparent conditions, color differences for the BLI (8.5) and LCI (7.9) were significantly higher than that of WLI (5.7; P < 0.001). Visibility scores for BLI (3.6) and LCI (3.4) were also higher than that of WLI (3.1; P < 0.0001). Under cloudy conditions, visibility scores for LCI (2.9) and WLI (2.7) were significantly higher than that of BLI (2.2; P < 0.0001 and P = 0.04, respectively).