1故障一1.1故障现象曝光后提示正在输送图像,但图像未显示,提示出错,提示内容为“The following error occurred:Errorcode:10”。1.2故障分析与排除故障现象说明从曝光到后处理没有问题,因此考虑软件出现故障。首先查看软件设置,点击...1故障一1.1故障现象曝光后提示正在输送图像,但图像未显示,提示出错,提示内容为“The following error occurred:Errorcode:10”。1.2故障分析与排除故障现象说明从曝光到后处理没有问题,因此考虑软件出现故障。首先查看软件设置,点击“开始”按钮鼠标指向“设置”,然后单击“控制面板”在其窗口双击“管理工具”,找到服务(本地),在右侧列表中找到Solid server 2.2,发现启动类型为禁用。点击鼠标右键打开属性,启动类型有自动、手动和禁用三个选项,选择“自动”,点击“确定”退出。展开更多
针对核医学发展需求,本研究提出将直线加速器机房改建为回旋加速器机房的解决方案。通过理论计算与MCNP(Monte Carlo N-particle transport code)模拟,评估原重混凝土机房(厚度1.2~2.6 m)对γ射线的屏蔽效能,并针对中子辐射提出内壁增...针对核医学发展需求,本研究提出将直线加速器机房改建为回旋加速器机房的解决方案。通过理论计算与MCNP(Monte Carlo N-particle transport code)模拟,评估原重混凝土机房(厚度1.2~2.6 m)对γ射线的屏蔽效能,并针对中子辐射提出内壁增设含硼聚乙烯(24~48 cm)的优化方案。结果表明:原有混凝土结构满足γ防护要求,选择屏蔽中子效率高、次生γ增量少的含硼聚乙烯,经模拟验证剂量率水平较低;采用聚乙烯慢化层与含硼聚乙烯(11%)吸收层组合,有效避免铁矿石骨料的中子活化风险;该方案施工难度低,成本可控,能够实现医疗设施高效再利用。本研究为同类改造提供技术参考,符合我国核医学高质量发展政策需求。展开更多
Standard bacterial suspensions play a crucial role in microbiological diagnosis.Traditional prepar-ation methods,which rely heavily on manual operations,face challenges such as poor reproducibility,low ef-ficiency,and...Standard bacterial suspensions play a crucial role in microbiological diagnosis.Traditional prepar-ation methods,which rely heavily on manual operations,face challenges such as poor reproducibility,low ef-ficiency,and biosafety concerns.In this study,we propose a high-precision automated colony extraction and separation system that combines large-field imaging and artificial intelligence(AI)to facilitate intelligent screening and localization of colonies.Firstly,a large-field imaging system was developed to capture high-resolution images of 90 mm Petri dishes,achieving a physical resolution of 13.2μm and an imaging speed of 13 frames per second.Subsequently,AI technology was employed for the automatic recognition and localiza-tion of colonies,enabling the selection of target colonies with diameters ranging from 1.9 to 2.3 mm.Next,a three-axis motion control platform was designed,accompanied by a path planning algorithm for the efficient extraction of colonies.An electronic pipette was employed for accurate colony collection.Additionally,a bacterial suspension concentration measurement module was developed,incorporating a 650 nm laser diode as the light source,achieving a measurement accuracy of 0.01 McFarland concentration(MCF).Finally,the system’s performance was validated through the preparation of an Esckerichia coli(E.coli)suspension.After 17 hours of cultivation,E.coli was extracted four times,achieving the target concentration set by the system.This work is expected to enable rapid and accurate microbial sample preparation,significantly reducing de-tection cycles and alleviating the workload of healthcare personnel.展开更多
目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022...目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022年1—12月于某院经常规胃镜检查发现胃黏膜呈现不典型病变的1325例患者的临床资料。根据所用胃镜电子染色技术的不同,将使用NBI技术的患者划分为NBI组,使用CBI技术的患者划分为CBI组,以1∶4比例进行PSM以调整基线特征的差异,最终纳入NBI组420例和CBI组105例。以病理诊断为金标准,计算2组诊断结果和病理诊断结果的符合率。采用敏感度、特异度、阴性预测值和阳性预测值对2组癌前状态的诊断准确性进行评估。使用R Studio软件进行统计学分析。结果:经过PSM后,2组数据的基线特征一致,且病理诊断结果占比差异无统计学意义(P>0.05)。对比浅表性胃炎、胃息肉和肿瘤,CBI组与NBI组的诊断符合率差异较小;CBI组对萎缩性胃炎的诊断符合率高于NBI组;CBI组对胃溃疡和异型增生的诊断符合率低于NBI组,差异较大。CBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为100.00%、52.08%、100.00%、67.14%,NBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为95.26%、64.29%、92.31%、75.10%。结论:运用CBI技术的国产胃镜对癌前状态的诊断效能与运用NBI技术的进口胃镜相近,在胃癌的早期筛查、诊断中可以优先考虑运用CBI技术的国产胃镜。展开更多
文摘1故障一1.1故障现象曝光后提示正在输送图像,但图像未显示,提示出错,提示内容为“The following error occurred:Errorcode:10”。1.2故障分析与排除故障现象说明从曝光到后处理没有问题,因此考虑软件出现故障。首先查看软件设置,点击“开始”按钮鼠标指向“设置”,然后单击“控制面板”在其窗口双击“管理工具”,找到服务(本地),在右侧列表中找到Solid server 2.2,发现启动类型为禁用。点击鼠标右键打开属性,启动类型有自动、手动和禁用三个选项,选择“自动”,点击“确定”退出。
文摘针对核医学发展需求,本研究提出将直线加速器机房改建为回旋加速器机房的解决方案。通过理论计算与MCNP(Monte Carlo N-particle transport code)模拟,评估原重混凝土机房(厚度1.2~2.6 m)对γ射线的屏蔽效能,并针对中子辐射提出内壁增设含硼聚乙烯(24~48 cm)的优化方案。结果表明:原有混凝土结构满足γ防护要求,选择屏蔽中子效率高、次生γ增量少的含硼聚乙烯,经模拟验证剂量率水平较低;采用聚乙烯慢化层与含硼聚乙烯(11%)吸收层组合,有效避免铁矿石骨料的中子活化风险;该方案施工难度低,成本可控,能够实现医疗设施高效再利用。本研究为同类改造提供技术参考,符合我国核医学高质量发展政策需求。
文摘Standard bacterial suspensions play a crucial role in microbiological diagnosis.Traditional prepar-ation methods,which rely heavily on manual operations,face challenges such as poor reproducibility,low ef-ficiency,and biosafety concerns.In this study,we propose a high-precision automated colony extraction and separation system that combines large-field imaging and artificial intelligence(AI)to facilitate intelligent screening and localization of colonies.Firstly,a large-field imaging system was developed to capture high-resolution images of 90 mm Petri dishes,achieving a physical resolution of 13.2μm and an imaging speed of 13 frames per second.Subsequently,AI technology was employed for the automatic recognition and localiza-tion of colonies,enabling the selection of target colonies with diameters ranging from 1.9 to 2.3 mm.Next,a three-axis motion control platform was designed,accompanied by a path planning algorithm for the efficient extraction of colonies.An electronic pipette was employed for accurate colony collection.Additionally,a bacterial suspension concentration measurement module was developed,incorporating a 650 nm laser diode as the light source,achieving a measurement accuracy of 0.01 McFarland concentration(MCF).Finally,the system’s performance was validated through the preparation of an Esckerichia coli(E.coli)suspension.After 17 hours of cultivation,E.coli was extracted four times,achieving the target concentration set by the system.This work is expected to enable rapid and accurate microbial sample preparation,significantly reducing de-tection cycles and alleviating the workload of healthcare personnel.
文摘目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022年1—12月于某院经常规胃镜检查发现胃黏膜呈现不典型病变的1325例患者的临床资料。根据所用胃镜电子染色技术的不同,将使用NBI技术的患者划分为NBI组,使用CBI技术的患者划分为CBI组,以1∶4比例进行PSM以调整基线特征的差异,最终纳入NBI组420例和CBI组105例。以病理诊断为金标准,计算2组诊断结果和病理诊断结果的符合率。采用敏感度、特异度、阴性预测值和阳性预测值对2组癌前状态的诊断准确性进行评估。使用R Studio软件进行统计学分析。结果:经过PSM后,2组数据的基线特征一致,且病理诊断结果占比差异无统计学意义(P>0.05)。对比浅表性胃炎、胃息肉和肿瘤,CBI组与NBI组的诊断符合率差异较小;CBI组对萎缩性胃炎的诊断符合率高于NBI组;CBI组对胃溃疡和异型增生的诊断符合率低于NBI组,差异较大。CBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为100.00%、52.08%、100.00%、67.14%,NBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为95.26%、64.29%、92.31%、75.10%。结论:运用CBI技术的国产胃镜对癌前状态的诊断效能与运用NBI技术的进口胃镜相近,在胃癌的早期筛查、诊断中可以优先考虑运用CBI技术的国产胃镜。
