目的:探讨国际卵巢肿瘤研究组(International ovarian of tumor analysis,IOTA)Logistic回归模型LR2预测卵巢良恶性肿瘤的价值。方法:选取2016年1月—2017年3月因附件包块在郑州大学第三附属医院住院并行手术治疗的215例患者,所有患者...目的:探讨国际卵巢肿瘤研究组(International ovarian of tumor analysis,IOTA)Logistic回归模型LR2预测卵巢良恶性肿瘤的价值。方法:选取2016年1月—2017年3月因附件包块在郑州大学第三附属医院住院并行手术治疗的215例患者,所有患者术前均接受超声检查,观察、总结声像图特点,用IOTA后处理软件计算风险值,随访术后病理结果,计算IOTA Logistic回归模型LR2的灵敏度、特异度、阳性预测值、阴性预测值、阳性似然比、阴性似然比及受试者工作特征(receiver operating characteristic,ROC)曲线的曲线下面积(area under curve,AUC)。结果:病例组共215例,其中良性肿瘤126例(58.6%),恶性肿瘤89例(41.4%),LR2的灵敏度为95.5%(95%CI:90.4%~98.3%),特异度为76.2%(95%CI:62.7%~87.7%),AUC为0.89(SE=0.024,95%CI:0.87~0.91)。结论:IOTA Logistic回归模型LR2在预测卵巢肿瘤方面有较高的应用价值,可作为非妇产科或者低年资超声科医师诊断卵巢肿瘤的辅助方法。展开更多
In this study, we used strippable LR 115 type 2 which is a Solid State Nuclear Track Detector (SSNTD) widely known for radon gas detection and measurement. The removed thickness of the active layer of samples of this ...In this study, we used strippable LR 115 type 2 which is a Solid State Nuclear Track Detector (SSNTD) widely known for radon gas detection and measurement. The removed thickness of the active layer of samples of this SSNTD, were determined by measuring the average initial thickness (before etching) and residual thickness after 80 to 135 minutes chemical etching in the standard conditions, using an electronic comparator. These results allowed the calculation of the bulk etch rate of this detector in a simple way. The mean value obtained is (3.21 ± 0.21) μm/h. This value is in close agreement with those reported by different authors. It is an important parameter for alpha track counting on the sensitive surface of this polymeric detector after chemical etching because track density depends extremely on its removed layer. This SSNTD was then used for environmental radon gas monitoring in Côte d’Ivoire.展开更多
文摘In this study, we used strippable LR 115 type 2 which is a Solid State Nuclear Track Detector (SSNTD) widely known for radon gas detection and measurement. The removed thickness of the active layer of samples of this SSNTD, were determined by measuring the average initial thickness (before etching) and residual thickness after 80 to 135 minutes chemical etching in the standard conditions, using an electronic comparator. These results allowed the calculation of the bulk etch rate of this detector in a simple way. The mean value obtained is (3.21 ± 0.21) μm/h. This value is in close agreement with those reported by different authors. It is an important parameter for alpha track counting on the sensitive surface of this polymeric detector after chemical etching because track density depends extremely on its removed layer. This SSNTD was then used for environmental radon gas monitoring in Côte d’Ivoire.
