目的:探讨乳腺数字断层扫描(digital breast tomosynthesis,DBT)影像计算机辅助诊断方法在乳腺肿块良恶性鉴别中的价值。方法:本研究纳入我院乳腺癌早期筛查患者(2018年02月至2020年02月)190例,分别提取和筛选DBT影像中常规手工特征和...目的:探讨乳腺数字断层扫描(digital breast tomosynthesis,DBT)影像计算机辅助诊断方法在乳腺肿块良恶性鉴别中的价值。方法:本研究纳入我院乳腺癌早期筛查患者(2018年02月至2020年02月)190例,分别提取和筛选DBT影像中常规手工特征和深度学习神经网络特征,进行特征级融合,建立逻辑回归分类器模型,并绘制诺模图,通过ROC曲线、校正曲线和决策曲线对模型进行评估。结果:影像组学手工特征与深度学习特征融合筛选后得到含有三个特征的最优特征集,融合模型的诊断效果优于单独特征;无监督聚类分析和箱线图表明获得的特征具有良好的良恶性鉴别能力;基于融合特征构建的诺模图模型在训练集和测试集上获得AUC值分别为0.985(95%CI 0.956~1.000,敏感性=0.970,特异性=0.929)和0.984(95%CI 0.956~1.000,敏感性=0.909,特异性=0.931),绘制决策曲线(DCA)表明模型具有良好的潜在临床应用价值。结论:通过影像组学手工特征与深度学习特征融合并建立计算机模型可辅助临床医生提高乳腺DBT影像对肿块的良恶性鉴别能力。展开更多
目的:研究数字乳腺断层摄影(digital breast tomosynthesis,DBT)影像特征及病理学特征与早期乳腺癌保乳手术(breastconserving surgery,BCS)结果的相关性。方法:回顾性分析2019年1月至2023年12月天津医科大学肿瘤医院行BCS成功保留乳房...目的:研究数字乳腺断层摄影(digital breast tomosynthesis,DBT)影像特征及病理学特征与早期乳腺癌保乳手术(breastconserving surgery,BCS)结果的相关性。方法:回顾性分析2019年1月至2023年12月天津医科大学肿瘤医院行BCS成功保留乳房422例和术中改行乳房全切术(mastectomy)211例的早期乳腺癌患者术前临床资料。收集两组病例的术前DBT影像及临床病理学特征,采用单因素Logistic回归分析筛选出与BCS手术结果相关的特征,随后进行多因素Logistic回归分析。结果:单因素Logistic回归分析结果显示年龄(P=0.020)、结构扭曲(P<0.001)、乳腺构成类型(极致密型,P=0.001)和分子分型(Her2过表达型,P=0.001)在保留乳房组及乳房全切组间比较差异具有统计学意义;多因素Logistic回归分析结果显示结构扭曲(P<0.001)、乳腺构成类型(极致密型,P=0.003)和分子分型(Her2过表达型,P<0.001)在两组比较差异具有统计学意义。结论:乳腺构成类型、结构扭曲以及分子分型与BCS结果具有一定相关性,乳腺构成类型为极致密型、病变表现有结构扭曲以及分子分型为Her2过表达型的患者提示更大的改行乳房全切术可能性,可作为术前评估乳腺癌BCS结果的有效指标,从而制定准确的手术策略。展开更多
A new efficient adapting virtual intermediate instruction set,V-IIS,is designed and implemented towards the optimized dynamic binary translator (DBT) system.With the help of this powerful but previously little-studied...A new efficient adapting virtual intermediate instruction set,V-IIS,is designed and implemented towards the optimized dynamic binary translator (DBT) system.With the help of this powerful but previously little-studied component,DBTs can not only get rid of the dependence of machine(s),but also get better performance.From our systematical study and evaluation,experimental results demonstrate that if V-IIS is well designed,without affecting the other optimizing measures,this could make DBT's performance close to those who do not have intermediate instructions.This study is an important step towards the grand goal of high performance "multi-source" and "multi-target" dynamic binary translation.展开更多
Objective:The aim of the study was to investigate the effect of Demethyl bryoanthrathiophene(DBT) on proliferations of human umbilical vein endothelial cells(HUVECs) and human lung adenocarcinoma cell line A549,and an...Objective:The aim of the study was to investigate the effect of Demethyl bryoanthrathiophene(DBT) on proliferations of human umbilical vein endothelial cells(HUVECs) and human lung adenocarcinoma cell line A549,and antiangiogenic effect of DBT on HUVECs in vitro.Methods:MTT assay was used to observe the effect of DBT on proliferations of HUVECs and A549 cells,flat plate scarification assay and tube formation in vitro test were used to observe the impact of DBT on migration and vaso-formed ability of HUVECs.The effects of DBT on apoptosis and cell cycle of HUVECs were calculated by flow cytometry.Results:MTT assay showed that treatment with DBT resulted in strong inhibition to the growth of HUVECs and A549 cells.The inhibition effects of DBT on HUVECs and A549 cells were related to dosage and times of dependency.In different doses of DBT(0.16,0.32 and 0.48 μmol/L) of flat plate scarification for 24 h,inhibition rates of DBT to migration of HUVECs were 14.70%,38.23% and 58.82%,respectively.In dose of DBT from 0.04,0.20 to 0.40 μmol/L for 24 h in tube formation,there were significance differences(P < 0.01) in the decreasing number of angiogenesis and incomplete blood vessel compared with control groups.All results showed that DBT promoted the apoptosis rate of HUVECs,and the increase of concentration of DBT accompanied the acceleration of apoptosis rate.Conclusion:DBT could inhibit the proliferations of HUVECs and A549 cells,and effectively suppress angiogenesis in vitro.展开更多
文摘目的:探讨乳腺数字断层扫描(digital breast tomosynthesis,DBT)影像计算机辅助诊断方法在乳腺肿块良恶性鉴别中的价值。方法:本研究纳入我院乳腺癌早期筛查患者(2018年02月至2020年02月)190例,分别提取和筛选DBT影像中常规手工特征和深度学习神经网络特征,进行特征级融合,建立逻辑回归分类器模型,并绘制诺模图,通过ROC曲线、校正曲线和决策曲线对模型进行评估。结果:影像组学手工特征与深度学习特征融合筛选后得到含有三个特征的最优特征集,融合模型的诊断效果优于单独特征;无监督聚类分析和箱线图表明获得的特征具有良好的良恶性鉴别能力;基于融合特征构建的诺模图模型在训练集和测试集上获得AUC值分别为0.985(95%CI 0.956~1.000,敏感性=0.970,特异性=0.929)和0.984(95%CI 0.956~1.000,敏感性=0.909,特异性=0.931),绘制决策曲线(DCA)表明模型具有良好的潜在临床应用价值。结论:通过影像组学手工特征与深度学习特征融合并建立计算机模型可辅助临床医生提高乳腺DBT影像对肿块的良恶性鉴别能力。
文摘目的:研究数字乳腺断层摄影(digital breast tomosynthesis,DBT)影像特征及病理学特征与早期乳腺癌保乳手术(breastconserving surgery,BCS)结果的相关性。方法:回顾性分析2019年1月至2023年12月天津医科大学肿瘤医院行BCS成功保留乳房422例和术中改行乳房全切术(mastectomy)211例的早期乳腺癌患者术前临床资料。收集两组病例的术前DBT影像及临床病理学特征,采用单因素Logistic回归分析筛选出与BCS手术结果相关的特征,随后进行多因素Logistic回归分析。结果:单因素Logistic回归分析结果显示年龄(P=0.020)、结构扭曲(P<0.001)、乳腺构成类型(极致密型,P=0.001)和分子分型(Her2过表达型,P=0.001)在保留乳房组及乳房全切组间比较差异具有统计学意义;多因素Logistic回归分析结果显示结构扭曲(P<0.001)、乳腺构成类型(极致密型,P=0.003)和分子分型(Her2过表达型,P<0.001)在两组比较差异具有统计学意义。结论:乳腺构成类型、结构扭曲以及分子分型与BCS结果具有一定相关性,乳腺构成类型为极致密型、病变表现有结构扭曲以及分子分型为Her2过表达型的患者提示更大的改行乳房全切术可能性,可作为术前评估乳腺癌BCS结果的有效指标,从而制定准确的手术策略。
基金Projects(12R21414600)supported by Shanghai Municipal Science and Technology Commission,China
文摘A new efficient adapting virtual intermediate instruction set,V-IIS,is designed and implemented towards the optimized dynamic binary translator (DBT) system.With the help of this powerful but previously little-studied component,DBTs can not only get rid of the dependence of machine(s),but also get better performance.From our systematical study and evaluation,experimental results demonstrate that if V-IIS is well designed,without affecting the other optimizing measures,this could make DBT's performance close to those who do not have intermediate instructions.This study is an important step towards the grand goal of high performance "multi-source" and "multi-target" dynamic binary translation.
基金Supported by a grant from the National Natural Science Foundation of China (No.30472078)
文摘Objective:The aim of the study was to investigate the effect of Demethyl bryoanthrathiophene(DBT) on proliferations of human umbilical vein endothelial cells(HUVECs) and human lung adenocarcinoma cell line A549,and antiangiogenic effect of DBT on HUVECs in vitro.Methods:MTT assay was used to observe the effect of DBT on proliferations of HUVECs and A549 cells,flat plate scarification assay and tube formation in vitro test were used to observe the impact of DBT on migration and vaso-formed ability of HUVECs.The effects of DBT on apoptosis and cell cycle of HUVECs were calculated by flow cytometry.Results:MTT assay showed that treatment with DBT resulted in strong inhibition to the growth of HUVECs and A549 cells.The inhibition effects of DBT on HUVECs and A549 cells were related to dosage and times of dependency.In different doses of DBT(0.16,0.32 and 0.48 μmol/L) of flat plate scarification for 24 h,inhibition rates of DBT to migration of HUVECs were 14.70%,38.23% and 58.82%,respectively.In dose of DBT from 0.04,0.20 to 0.40 μmol/L for 24 h in tube formation,there were significance differences(P < 0.01) in the decreasing number of angiogenesis and incomplete blood vessel compared with control groups.All results showed that DBT promoted the apoptosis rate of HUVECs,and the increase of concentration of DBT accompanied the acceleration of apoptosis rate.Conclusion:DBT could inhibit the proliferations of HUVECs and A549 cells,and effectively suppress angiogenesis in vitro.
