Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats...Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats were randomly divided into MI group(n=15)and sham operation group(n=10).MI models were established in MI group through ligation of the left anterior descending coronary artery using atraumatic suture,while no intervention was given to those in sham operation group after thoracotomy.MCE images of both basal and papillary muscle levels on the short axis section of left ventricles were acquired after 1 week,which were assessed independently by 2 junior and 2 senior ultrasound physicians.The evaluating efficacy of MI segment,the mean interpretation time and the consistency were compared whether under the assistance of PResNet model or not.Results No significant difference of efficacy of evaluation on MI segment was found for senior physicians with or without assistance of PResNet model(both P>0.05).Under the assistance of PResNet model,the efficacy of junior physicians for diagnosing MI segment was significantly improved compared with that without the assistance of PResNet model(both P<0.01),and was comparable to that of senior physicians.Under the assistance of PResNet model,the mean interpretation time of each physician was significantly shorter than that without assistance(all P<0.001),and the consistency between junior physicians and among junior and senior physicians were both moderate(Kappa=0.692,0.542),which became better under the assistance(Kappa=0.763,0.749).Conclusion PResNet could improve the efficacy of junior physicians for evaluation on rat MI segment in MCE images,shorten interpretation time with different aptitudes,also improve the consistency to some extent.展开更多
随着信息通信技术(information communication technology,ICT)的快速发展,智能手机和平板等各种信息器材的广泛应用已经深入我们生活的方方面面。而ICT在旅游领域中的应用,给旅游这一社会现象带来前所未有的变革。旅行者和旅游产业,甚...随着信息通信技术(information communication technology,ICT)的快速发展,智能手机和平板等各种信息器材的广泛应用已经深入我们生活的方方面面。而ICT在旅游领域中的应用,给旅游这一社会现象带来前所未有的变革。旅行者和旅游产业,甚至旅游目的地都积极引用高度发达的信息技术,从而诞生了智慧旅游(smart tourism)这一全新的旅游观念和模式。所谓智慧旅游,简单地说,就是合理地利用智能器材来有效地传递或获取旅游所需要的信息,从而提高旅游质量的旅行方式。展开更多
桡骨远端骨折是上肢最常见的骨折类型之一,是临床骨科的常见病和多发病。桡骨远端骨折分型主要以AO(arbeitsgemeinschaft für osteosynthesefragen)分型为主,已成为国内外临床医师的共识。目前主要治疗方法包括保守治疗和手术治疗...桡骨远端骨折是上肢最常见的骨折类型之一,是临床骨科的常见病和多发病。桡骨远端骨折分型主要以AO(arbeitsgemeinschaft für osteosynthesefragen)分型为主,已成为国内外临床医师的共识。目前主要治疗方法包括保守治疗和手术治疗。保守治疗主要包括小夹板固定、石膏托外固定及支具固定;手术治疗包括克氏针固定、外固定支架、切开复位内固定术、关节镜下辅助复位固定、骨与骨替代物的移植辅助固定、髓内钉固定术以及人工腕关节置换。而针对不同类型、不同严重程度的桡骨远端骨折可选择的固定方法不一,如何选择最有效的固定方法已成为临床医师亟待解决的问题。展开更多
文摘Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats were randomly divided into MI group(n=15)and sham operation group(n=10).MI models were established in MI group through ligation of the left anterior descending coronary artery using atraumatic suture,while no intervention was given to those in sham operation group after thoracotomy.MCE images of both basal and papillary muscle levels on the short axis section of left ventricles were acquired after 1 week,which were assessed independently by 2 junior and 2 senior ultrasound physicians.The evaluating efficacy of MI segment,the mean interpretation time and the consistency were compared whether under the assistance of PResNet model or not.Results No significant difference of efficacy of evaluation on MI segment was found for senior physicians with or without assistance of PResNet model(both P>0.05).Under the assistance of PResNet model,the efficacy of junior physicians for diagnosing MI segment was significantly improved compared with that without the assistance of PResNet model(both P<0.01),and was comparable to that of senior physicians.Under the assistance of PResNet model,the mean interpretation time of each physician was significantly shorter than that without assistance(all P<0.001),and the consistency between junior physicians and among junior and senior physicians were both moderate(Kappa=0.692,0.542),which became better under the assistance(Kappa=0.763,0.749).Conclusion PResNet could improve the efficacy of junior physicians for evaluation on rat MI segment in MCE images,shorten interpretation time with different aptitudes,also improve the consistency to some extent.
文摘随着信息通信技术(information communication technology,ICT)的快速发展,智能手机和平板等各种信息器材的广泛应用已经深入我们生活的方方面面。而ICT在旅游领域中的应用,给旅游这一社会现象带来前所未有的变革。旅行者和旅游产业,甚至旅游目的地都积极引用高度发达的信息技术,从而诞生了智慧旅游(smart tourism)这一全新的旅游观念和模式。所谓智慧旅游,简单地说,就是合理地利用智能器材来有效地传递或获取旅游所需要的信息,从而提高旅游质量的旅行方式。
文摘桡骨远端骨折是上肢最常见的骨折类型之一,是临床骨科的常见病和多发病。桡骨远端骨折分型主要以AO(arbeitsgemeinschaft für osteosynthesefragen)分型为主,已成为国内外临床医师的共识。目前主要治疗方法包括保守治疗和手术治疗。保守治疗主要包括小夹板固定、石膏托外固定及支具固定;手术治疗包括克氏针固定、外固定支架、切开复位内固定术、关节镜下辅助复位固定、骨与骨替代物的移植辅助固定、髓内钉固定术以及人工腕关节置换。而针对不同类型、不同严重程度的桡骨远端骨折可选择的固定方法不一,如何选择最有效的固定方法已成为临床医师亟待解决的问题。