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首页> 外文期刊>Endoscopy International Open >Objective image analysis of non-magnifying image-enhanced endoscopy for diagnosis of small depressed early gastric cancers
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Objective image analysis of non-magnifying image-enhanced endoscopy for diagnosis of small depressed early gastric cancers

机译：非放大图像内窥镜检查的客观图像分析对早期抑郁症的诊断

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Background Gastric cancers (GC) after H. pylori eradication are difficult to diagnose even by magnifying narrow-band imaging (NBI) or blue laser imaging (BLI) endoscopy. Little is known with regard to non-magnifying (NM)-NBI/BLI for early GC so we examined the efficacy of NM-NBI/BLI for early GC diagnosis. Methods We retrospectively analyzed the images of 29 small (≤?1?cm) intramucosal GC that had been treated with endoscopic submucosal dissection and 137 benign depressed lesions (BDLs). The brightness and shape of the GCs and BDLs by NM-NBI/BLI were assessed with ImageJ software. Results The NBI/BLI-index, which indicates the brightness of NBI/BLI for visualization, was significantly higher in GC than BDLs in both the H. pylori -infected ( P =?0.009) and -eradicated group ( P ?0.0001), indicating that GC exhibited brighter colors than the normal surrounding mucosa. The C-index, which refers to the circularity of the lesion, was also significantly higher in GC than BDLs in both H. pylori -infected ( P =?0.006) and -eradicated cases ( P =?0.004). Based on receiver-operating characteristic curve analysis, cutoff values for the NBI/BLI- and C-indices for GC were 1.04 and 0.58 in the H. pylori -infected cases, and 0.98 and 0.64 in the H. pylori -eradicated cases. With the reference value of the NBI/BLI-index set at?≥?0.69 with the C-index at ≥?0.21 in the H. pylori -infected and the NBI/BLI-index at ≥?0.80 with the C-index at ≥?0.32 in the H. pylori -eradicated cases, both the sensitivity and negative predictive value for early GC were 100?%. A high NBI/BLI-index tended to be associated with a wide length of the intervening part histologically in the H. pylori -eradicated cases ( P =?0.09). Conclusions The small depressed-type early GC had brighter color and rounder shape compared to BDLs in both H. pylori -infected and -eradicated cases. The NBI/BLI- and C-indices calculated by the image analysis may facilitate identification of small depressed-type GC.
机译：背景技术即使通过放大窄带成像（NBI）或蓝色激光成像（BLI）内窥镜检查，也难以诊断根除幽门螺杆菌后的胃癌（GC）。对于早期GC的非放大（NM）-NBI / BLI知之甚少，因此我们检查了NM-NBI / BLI对早期GC诊断的功效。方法回顾性分析经内镜黏膜下剥离术治疗的29例（≤？1？cm）小黏膜内GC和137例良性抑郁症（BDL）的图像。使用ImageJ软件评估NM-NBI / BLI产生的GC和BDL的亮度和形状。结果幽门螺杆菌感染（P =？0.009）和根除组（P <？0.0001）中，NBI / BLI指数表示用于可视化的NBI / BLI的亮度，在GC中显着高于BDL。 ，表明GC表现出比正常周围粘膜更亮的颜色。在幽门螺杆菌感染（P =？0.006）和根除病例（P =？0.004）中，C-指数（指病变的圆形度）在GC中也显着高于BDL。根据接受者操作特征曲线分析，幽门螺杆菌感染病例的NBI / BLI和C指数的GC截止值为1.04和0.58，幽门螺杆菌感染病例的临界值为0.98和0.64。将感染幽门螺杆菌的NBI / BLI指数的参考值设为≥≥0.69，将C指数设为≥0.21，将NBI / BLI指数的参考值设为≥0.80，将C指数设为≥在幽门螺杆菌根除的病例中≥≥0.32，早期GC的敏感性和阴性预测值均为100％。在组织学上，幽门螺杆菌根除的病例中，较高的NBI / BLI指数往往与介入部位的长度较长有关（P =？0.09）。结论与幽门螺杆菌感染和根除的病例相比，小型的低气压型早期GC的颜色和形状均较BDL明亮。通过图像分析计算出的NBI / BLI和C指数可能有助于识别小型凹陷型GC。

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