目的 基于功能性磁共振成像(functional magnetic resonance imaging,fMRI)技术,观察针刺阳陵泉对右侧缺血性卒中患者百分比振幅(percent amplitude of fluctuation,PerAF)变化的影响。方法 纳入右侧缺血性卒中患者28例(观察组),并募集...目的 基于功能性磁共振成像(functional magnetic resonance imaging,fMRI)技术,观察针刺阳陵泉对右侧缺血性卒中患者百分比振幅(percent amplitude of fluctuation,PerAF)变化的影响。方法 纳入右侧缺血性卒中患者28例(观察组),并募集与患者性别和年龄相匹配的健康受试者28例(对照组)。观察组分别进行静息态及针刺阳陵泉后静息态fMRI扫描,对照组仅进行静息态fMRI扫描。计算两组全脑体素的PerAF。结果观察组静息态左侧楔前叶PerAF值高于对照组静息态(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾);观察组针刺后左侧楔前叶PerAF值与对照组静息态比较有升高有降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾),观察组针刺后左侧枕中回、右侧角回和右侧中扣带回PerAF值较对照组静息态降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾)。观察组针刺后右侧中扣带回PerAF值较观察组静息态降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾)。结论 右侧缺血性卒中患者静息态左侧楔前叶PerAF值高于健康者,针刺阳陵泉穴可调节右侧缺血性卒中患者多个脑区PerAF值,右侧中扣带回可能是其发挥脑效应机制潜在脑区。展开更多
Objective:To test the diagnostic performance of percent free prostate-specific antigen(%fPSA)in predicting any prostate cancer(PCa)and high-grade prostate cancer(HGPCa)in a retrospective multi-center biopsy cohort wit...Objective:To test the diagnostic performance of percent free prostate-specific antigen(%fPSA)in predicting any prostate cancer(PCa)and high-grade prostate cancer(HGPCa)in a retrospective multi-center biopsy cohort with a PSA level of 4.0e10.0 ng/mL in China.Methods:Consecutive patients with a PSA of 4.0-10.0 ng/mL who underwent transrectal ultrasound-guided biopsy were enrolled at 16 Chinese medical centers from January 1st,2010 to December 31st,2013.Total and free serum PSA determinations were performed using three types of electro-chemiluminescence immunoassays recalibrated to the World Health Organization(WHO)standard.The diagnostic accuracy of PSA,%fPSA,and %fPSA in combination with PSA(%fPSA t PSA)was determined using the area under the receiver operating characteristic(ROC)curve(AUC).Results:A total of 2310 consecutive men with PSA levels between 4.0 and 10.0 ng/mL were included,and the detection rate of PCa was 25.1%.The AUC of%fPSA and %fPSA t PSA in predicting any PCa was superior to PSA alone in men aged≥60 years(0.623 vs.0.534,p<0.0001)but not in men aged 40e59 years(0.517 vs.0.518,p=0.939).Similar result was yield in predicting HGPCa.Conclusion:In a clinical setting of Chinese men with 4.0e10.0 ng/mL PSA undergoing initial prostate biopsy,adding %fPSA to PSA can moderately improve the diagnostic accuracy for any PCa and HGPCa compared with PSA alone in patients≥60 but not in patients aged 40-59 years.展开更多
Recent researches focused on developing robust blast load mitigation systems due to the threats of terrorist attacks.One of the main embraced strategies is the structural systems that use mitigation techniques.They ar...Recent researches focused on developing robust blast load mitigation systems due to the threats of terrorist attacks.One of the main embraced strategies is the structural systems that use mitigation techniques.They are developed from a combination of structural elements and described herein as conventional systems.Among the promising techniques is that redirect the waves propagation through hollow tubes.The blast wave propagation through tubes provides an efficient system since it combines many blast wave phenomena,such as reflection,diffraction,and interaction.In this research,a novel blast load mitigation system,employed as a protection fence,is developed using a technique similar to the technique of the bent tube in manipulating the shock-wave.The relative performance of the novel system to the conventional system is evaluated based on mitigation percent criteria.Performances of both systems are calculated through numerical simulation.The proposed novel system proved to satisfy high performance in mitigating the generated blast waves from charges weight up to 500 kg TNT at relatively small standoff distances(5 m and 8 m).It mitigates at least 94%of the blast waves,which means that only 6%of that blast impulse is considered as the applied load on the targeted structure.展开更多
Objective To evaluate using prostate specific antigen (PSA) and percent free PSA(fPSA) for the diagnosis of prostate cancer(Pca) and benign prostate hyperplasia(BPH). Methods 315 men with BPH and 55 men with Pca wer...Objective To evaluate using prostate specific antigen (PSA) and percent free PSA(fPSA) for the diagnosis of prostate cancer(Pca) and benign prostate hyperplasia(BPH). Methods 315 men with BPH and 55 men with Pca were randomly chosen, serum fPSA and total PSA were determined by ELISA and then we compared the sensitivity and specificity of PSA and percent fPSA for the diagnosis of Pca. Results While using PSA and percent fPSA for the diagnosis of prostate cancer, the sensitivity was similar (89.8% vs. 94.5%, P> 0.05), but the specificity was significanty different (52.7% vs. 89.8%, P< 0.005). Conclusions Using percent fPSA might decrease false-positive and avoid 37.1% negative biopsies as compared with PSA, it is very valuable for the diagnosis of Pca.展开更多
文摘目的 基于功能性磁共振成像(functional magnetic resonance imaging,fMRI)技术,观察针刺阳陵泉对右侧缺血性卒中患者百分比振幅(percent amplitude of fluctuation,PerAF)变化的影响。方法 纳入右侧缺血性卒中患者28例(观察组),并募集与患者性别和年龄相匹配的健康受试者28例(对照组)。观察组分别进行静息态及针刺阳陵泉后静息态fMRI扫描,对照组仅进行静息态fMRI扫描。计算两组全脑体素的PerAF。结果观察组静息态左侧楔前叶PerAF值高于对照组静息态(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾);观察组针刺后左侧楔前叶PerAF值与对照组静息态比较有升高有降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾),观察组针刺后左侧枕中回、右侧角回和右侧中扣带回PerAF值较对照组静息态降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾)。观察组针刺后右侧中扣带回PerAF值较观察组静息态降低(GRF校正,体素水平P<0.001,团块水平P<0.05,双尾)。结论 右侧缺血性卒中患者静息态左侧楔前叶PerAF值高于健康者,针刺阳陵泉穴可调节右侧缺血性卒中患者多个脑区PerAF值,右侧中扣带回可能是其发挥脑效应机制潜在脑区。
文摘Objective:To test the diagnostic performance of percent free prostate-specific antigen(%fPSA)in predicting any prostate cancer(PCa)and high-grade prostate cancer(HGPCa)in a retrospective multi-center biopsy cohort with a PSA level of 4.0e10.0 ng/mL in China.Methods:Consecutive patients with a PSA of 4.0-10.0 ng/mL who underwent transrectal ultrasound-guided biopsy were enrolled at 16 Chinese medical centers from January 1st,2010 to December 31st,2013.Total and free serum PSA determinations were performed using three types of electro-chemiluminescence immunoassays recalibrated to the World Health Organization(WHO)standard.The diagnostic accuracy of PSA,%fPSA,and %fPSA in combination with PSA(%fPSA t PSA)was determined using the area under the receiver operating characteristic(ROC)curve(AUC).Results:A total of 2310 consecutive men with PSA levels between 4.0 and 10.0 ng/mL were included,and the detection rate of PCa was 25.1%.The AUC of%fPSA and %fPSA t PSA in predicting any PCa was superior to PSA alone in men aged≥60 years(0.623 vs.0.534,p<0.0001)but not in men aged 40e59 years(0.517 vs.0.518,p=0.939).Similar result was yield in predicting HGPCa.Conclusion:In a clinical setting of Chinese men with 4.0e10.0 ng/mL PSA undergoing initial prostate biopsy,adding %fPSA to PSA can moderately improve the diagnostic accuracy for any PCa and HGPCa compared with PSA alone in patients≥60 but not in patients aged 40-59 years.
文摘Recent researches focused on developing robust blast load mitigation systems due to the threats of terrorist attacks.One of the main embraced strategies is the structural systems that use mitigation techniques.They are developed from a combination of structural elements and described herein as conventional systems.Among the promising techniques is that redirect the waves propagation through hollow tubes.The blast wave propagation through tubes provides an efficient system since it combines many blast wave phenomena,such as reflection,diffraction,and interaction.In this research,a novel blast load mitigation system,employed as a protection fence,is developed using a technique similar to the technique of the bent tube in manipulating the shock-wave.The relative performance of the novel system to the conventional system is evaluated based on mitigation percent criteria.Performances of both systems are calculated through numerical simulation.The proposed novel system proved to satisfy high performance in mitigating the generated blast waves from charges weight up to 500 kg TNT at relatively small standoff distances(5 m and 8 m).It mitigates at least 94%of the blast waves,which means that only 6%of that blast impulse is considered as the applied load on the targeted structure.
文摘Objective To evaluate using prostate specific antigen (PSA) and percent free PSA(fPSA) for the diagnosis of prostate cancer(Pca) and benign prostate hyperplasia(BPH). Methods 315 men with BPH and 55 men with Pca were randomly chosen, serum fPSA and total PSA were determined by ELISA and then we compared the sensitivity and specificity of PSA and percent fPSA for the diagnosis of Pca. Results While using PSA and percent fPSA for the diagnosis of prostate cancer, the sensitivity was similar (89.8% vs. 94.5%, P> 0.05), but the specificity was significanty different (52.7% vs. 89.8%, P< 0.005). Conclusions Using percent fPSA might decrease false-positive and avoid 37.1% negative biopsies as compared with PSA, it is very valuable for the diagnosis of Pca.
