目的探索合成MRI(synthetic MRI,syMRI)对卵巢-附件影像报告和数据系统(Ovarian-Adnexal Reporting and Data System,O-RADS)MRI 3~5分的卵巢附件占位良恶性鉴别的效能。材料与方法回顾性分析在2021年8月至2023年6月期间于我院就诊的10...目的探索合成MRI(synthetic MRI,syMRI)对卵巢-附件影像报告和数据系统(Ovarian-Adnexal Reporting and Data System,O-RADS)MRI 3~5分的卵巢附件占位良恶性鉴别的效能。材料与方法回顾性分析在2021年8月至2023年6月期间于我院就诊的100例盆腔占位患者病例及影像资料,共计附件肿块126例,所有占位的O-RADS MRI评分均为3~5分。以手术病理或至少1年的随访结果为诊断标准。所有患者均在3.0 T MRI扫描仪上进行盆腔MRI扫描,包括syMRI及扩散加权成像(diffusion-weighted imaging,DWI)序列。在附件区病灶的实性成分的最大层面勾画感兴趣区,以获得syMRI定量参数[T1、质子密度(proton density,PD)、T2^(*)、R2^(*)]及表观扩散系数(apparent diffusion coefficient,ADC)值。采用独立样本t检验或Mann-Whitney U检验比较各参数的差异,通过logistic回归分析建立syMRI及syMRI+ADC诊断模型,采用受试者工作特征(receiver operating characteristic,ROC)曲线比较各参数及模型的诊断效能,DeLong检验比较各模型ROC曲线下面积(area under the curve,AUC)的差异。结果入组100例患者共126个病灶,其中良性55例,恶性71例。T1、T2^(*)、R2^(*)及ADC值在两组间差异有统计学意义(P<0.05),其鉴别卵巢附件良恶性病变的AUC分别为0.739[95%置信区间(confidence interval,CI):0.652~0.826]、0.780(95%CI:0.698~0.862)、0.783(95%CI:0.699~0.866)及0.674(95%CI:0.576~0.772)。syMRI及syMRI+ADC模型的AUC分别为0.860(95%CI:0.791~0.929)及0.879(95%CI:0.818~0.940),二者之间差异无统计学意义,均高于ADC值(P<0.05)。结论syMRI在鉴别O-RADS MRI 3~5分卵巢附件病变的良恶性中具有很好的效能。展开更多
The fourth-order B spline wavelet scaling functions are used to solve the two-dimensional unsteady diffusion equation. The calculations from a case history indicate that the method provides high accuracy and the compu...The fourth-order B spline wavelet scaling functions are used to solve the two-dimensional unsteady diffusion equation. The calculations from a case history indicate that the method provides high accuracy and the computational efficiency is enhanced due to the small matrix derived from this method.The respective features of 3-spline wavelet scaling functions,4-spline wavelet scaling functions and quasi-wavelet used to solve the two-dimensional unsteady diffusion equation are compared. The proposed method has potential applications in many fields including marine science.展开更多
It is destiny that they met each other and developed“pauk-phaw”friendship between them.Today the story I will tell you is about a Chinese girl and a Myanmar girl.On a summer day when bougainvillea was in full bloom,...It is destiny that they met each other and developed“pauk-phaw”friendship between them.Today the story I will tell you is about a Chinese girl and a Myanmar girl.On a summer day when bougainvillea was in full bloom,a Chinese girl named Xiao Ai was standing at the gate of Yangon University of Foreign Languages,books in arms and Pouluda(Traditional Dai Drink)in hand.All of a sudden,a motorcycle sped past by her,and the screeching noise made her stagger and fall onto the ground.As a result,the books she held scattered here and there and the drink spilt over her body.展开更多
文摘目的探索合成MRI(synthetic MRI,syMRI)对卵巢-附件影像报告和数据系统(Ovarian-Adnexal Reporting and Data System,O-RADS)MRI 3~5分的卵巢附件占位良恶性鉴别的效能。材料与方法回顾性分析在2021年8月至2023年6月期间于我院就诊的100例盆腔占位患者病例及影像资料,共计附件肿块126例,所有占位的O-RADS MRI评分均为3~5分。以手术病理或至少1年的随访结果为诊断标准。所有患者均在3.0 T MRI扫描仪上进行盆腔MRI扫描,包括syMRI及扩散加权成像(diffusion-weighted imaging,DWI)序列。在附件区病灶的实性成分的最大层面勾画感兴趣区,以获得syMRI定量参数[T1、质子密度(proton density,PD)、T2^(*)、R2^(*)]及表观扩散系数(apparent diffusion coefficient,ADC)值。采用独立样本t检验或Mann-Whitney U检验比较各参数的差异,通过logistic回归分析建立syMRI及syMRI+ADC诊断模型,采用受试者工作特征(receiver operating characteristic,ROC)曲线比较各参数及模型的诊断效能,DeLong检验比较各模型ROC曲线下面积(area under the curve,AUC)的差异。结果入组100例患者共126个病灶,其中良性55例,恶性71例。T1、T2^(*)、R2^(*)及ADC值在两组间差异有统计学意义(P<0.05),其鉴别卵巢附件良恶性病变的AUC分别为0.739[95%置信区间(confidence interval,CI):0.652~0.826]、0.780(95%CI:0.698~0.862)、0.783(95%CI:0.699~0.866)及0.674(95%CI:0.576~0.772)。syMRI及syMRI+ADC模型的AUC分别为0.860(95%CI:0.791~0.929)及0.879(95%CI:0.818~0.940),二者之间差异无统计学意义,均高于ADC值(P<0.05)。结论syMRI在鉴别O-RADS MRI 3~5分卵巢附件病变的良恶性中具有很好的效能。
文摘The fourth-order B spline wavelet scaling functions are used to solve the two-dimensional unsteady diffusion equation. The calculations from a case history indicate that the method provides high accuracy and the computational efficiency is enhanced due to the small matrix derived from this method.The respective features of 3-spline wavelet scaling functions,4-spline wavelet scaling functions and quasi-wavelet used to solve the two-dimensional unsteady diffusion equation are compared. The proposed method has potential applications in many fields including marine science.
文摘It is destiny that they met each other and developed“pauk-phaw”friendship between them.Today the story I will tell you is about a Chinese girl and a Myanmar girl.On a summer day when bougainvillea was in full bloom,a Chinese girl named Xiao Ai was standing at the gate of Yangon University of Foreign Languages,books in arms and Pouluda(Traditional Dai Drink)in hand.All of a sudden,a motorcycle sped past by her,and the screeching noise made her stagger and fall onto the ground.As a result,the books she held scattered here and there and the drink spilt over her body.
