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基于少样本学习算法的结直肠粘膜下肿瘤和息肉内镜图像分类系统
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作者 伍亚辉 朱世祺 +2 位作者 吴宇东 张儒发 朱锦舟 《中国医学物理学杂志》 CSCD 2024年第7期897-904,共8页
目的:为解决难以收集足够结直肠粘膜下肿瘤样本训练深度学习模型的问题,基于少样本学习算法构建了粘膜下肿瘤和息肉内镜图像分类模型。方法:收集多中心来源的结直肠粘膜下肿瘤内镜图像共172张,包括结直肠脂肪瘤(CRLs)、神经内分泌肿瘤(N... 目的:为解决难以收集足够结直肠粘膜下肿瘤样本训练深度学习模型的问题,基于少样本学习算法构建了粘膜下肿瘤和息肉内镜图像分类模型。方法:收集多中心来源的结直肠粘膜下肿瘤内镜图像共172张,包括结直肠脂肪瘤(CRLs)、神经内分泌肿瘤(NETs)、锯齿状病变及息肉、传统腺瘤各43张。基于这些内镜图像构建支持集和查询集,在ImageNet和食管内镜图像上二次预训练的ResNet50提取图像特征,计算欧氏距离,使用K近邻算法进行分类。与原始模型和低、高年资内镜医师进行对比,评估少样本学习模型的分类性能。结果:提出的少样本学习模型分类准确率、宏曲线下面积和MacroF1值分别为0.831、0.925和0.831,诊断CRLs的准确率和F1值分别为0.925和0.850,诊断NETs的准确率和F1值分别为0.906和0.805。同时,该模型具有较好的分类一致性(Kappa=0.775)和可解释性。结论:构建的少样本学习模型在区分CRLs、NETs、锯齿状病变及息肉、传统腺瘤内镜图像上表现出优异性能,可用于辅助内镜下识别结直肠粘膜下肿瘤。 展开更多
关键词 少样本学习 结直肠粘膜下肿瘤 结直肠息肉 消化内镜图像 深度学习
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Propofol vs midazolam plus fentanyl for upper gastrointestinal endomicroscopy:A randomized trial 被引量:7
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作者 Xiu-Li Zuo Zhen Li +6 位作者 Xiao-Ping Liu Chang-Qing Li Rui Ji Peng Wang Cheng-Jun Zhou Han Liu Yan-Qing Li 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第15期1814-1821,共8页
AIM:To compare the endomicroscopic image quality of integrated confocal laser endomicroscopy(iCLE)and sedation efficacy of propofolvs midazolam plus fentanyl(M/F).METHODS:Consecutive outpatients undergoing iCLE were p... AIM:To compare the endomicroscopic image quality of integrated confocal laser endomicroscopy(iCLE)and sedation efficacy of propofolvs midazolam plus fentanyl(M/F).METHODS:Consecutive outpatients undergoing iCLE were prospectively recruited and randomized to the propofol group(P group)or M/F group.The patient,performing endoscopist and endoscopic assistant were blinded to the randomization.The quality of endomicro-scopic images and anesthetic efficacy outcomes were blindly evaluated after iCLE examination.RESULTS:There were significantly more good quality endomicroscopic images in the propofol group than in the M/F group(72.75%vs 52.89%,P<0.001).The diagnostic accuracy for upper gastrointestinal mucosal lesions using confocal laser endomicroscopy favors the P group,although this did not reach statistical significance.Adverse events and patient assessment were not significantly different for M/F vs propofol except for more frequent intraprocedural recall with M/F.Procedure duration and sedation times were significantly longer in the M/F group,while the scores of endoscopist,anesthetist and assistant assessment were all significantly better in the P group.CONCLUSION:Sedation with propofol might increase the proportion of good quality endomicroscopic images,and may result in improved procedural efficacy and diagnostic accuracy during iCLE examination. 展开更多
关键词 Confocal laser endomicroscopy Conscious sedation Randomized trial Sensitivity and specificity Image quality
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