2026年1月,索尼Cine Alta V 2分体拓展系统Mini正式上市。其内置CineAltaV 2的8.6K全画幅CMOS传感器,搭配插入式ND滤镜,可创造出色的、富有质感的影像表现。值得一提的是,其头部体积比前一代减小了约70%,更便携的设计为创作者在有限空...2026年1月,索尼Cine Alta V 2分体拓展系统Mini正式上市。其内置CineAltaV 2的8.6K全画幅CMOS传感器,搭配插入式ND滤镜,可创造出色的、富有质感的影像表现。值得一提的是,其头部体积比前一代减小了约70%,更便携的设计为创作者在有限空间进行手持、极限动作等拍摄提供更多的创作自由。除了适应紧凑环境的拍摄外,索尼Cine Alta V 2分体拓展系统Mini还可用于3D、VR拍摄。此外,新品还配备多个安装点,方便轻松连接多种配件,可拆卸的电缆线材质更软、操控更灵活,使拍摄更高效,使用场景更多元。展开更多
随着身份认证需求增长,适用于多领域的虹膜识别技术因高准确性成为研究重点。本研究设计了高精度虹膜识别镜头,由四片透镜组成,总长4.00 mm, F#2.4,采用Optic Studio ZEMAX软件仿真。仿真结果显示,镜头MTF在关键频率下大于0.6,畸变小于0...随着身份认证需求增长,适用于多领域的虹膜识别技术因高准确性成为研究重点。本研究设计了高精度虹膜识别镜头,由四片透镜组成,总长4.00 mm, F#2.4,采用Optic Studio ZEMAX软件仿真。仿真结果显示,镜头MTF在关键频率下大于0.6,畸变小于0.6%,相对照度稳定。该设计满足虹膜识别高精度要求,同时结合教学实践,提升了学生光学设计与工程能力。此研究为虹膜识别镜头开发提供了参考,也为案例教学奠定了基础。展开更多
BACKGROUND Rectal cancer is one of the common digestive system malignant tumors around the world.Its early diagnosis and staging are crucial for rectal cancer treatment and prognosis.In recent years,tumor markers have...BACKGROUND Rectal cancer is one of the common digestive system malignant tumors around the world.Its early diagnosis and staging are crucial for rectal cancer treatment and prognosis.In recent years,tumor markers have gradually received attention in early screening,treatment monitoring and prognostic evaluation of cancer,but their predictive role in rectal cancer staging and differentiation is still unclear.AIM To assess the prognostic value of tumor markers alpha-fetoprotein(AFP)cancer antigen 72-4(CA72-4),carbohydrate antigen 19-9(CA19-9),and carcinoembryonic antigen(CEA),alongside multimodal magnetic resonance imaging(MRI),for staging and differentiating rectal cancer in patients.METHODS This study retrospectively analyzed 167 patients with rectal cancer who were treated at our institution from January 2020 to December 2024.Each patient underwent serological testing and multimodal MRI for diagnosis.Histopathological examination after surgical resection or imaging based on follow-up was used as the gold standard.According to the T stage and differentiation degree,patients were divided into low stage group(T1-T2)and high stage group(T3-T4).In addition,they were divided into low-differentiation groups and high-differentiation groups according to their differentiation degree.We compared the accuracy,sensitivity and specificity of tumor marker levels and MRI in rectal cancer stage and differentiation.RESULTS The study's findings indicate that in the context of rectal cancer T staging,there is substantial concordance between MRI and clinicopathological assessments,with a Kappa coefficient of 0.789(P<0.001).Similarly,for various degrees of tumor differentiation,MRI and clinicopathological evaluations demonstrated substantial agreement,with a Kappa coefficient of 0.651(P<0.001).Notably,the concentrations of tumor markers CA19-9,CA72-4,CEA,and AFP were significantly elevated in the T3-T4 stage compared to the T1-T2 stage.Furthermore,these markers were significantly higher in the low-differentiation group compared to the high-differentiation group(P<0.05).The combined use of tumor markers and MRI for preoperative T staging of rectal cancer yielded a diagnostic sensitivity of 93.7%and a specificity of 94.6%,as evidenced by the receiver operating characteristic analysis,with an area under the curve of 0.947.For tumor differentiation,the diagnostic sensitivity and specificity were 93.6%and 97.1%,respectively,with an area under the curve of 0.978(95%confidence interval:0.946-1.000),surpassing the accuracy of individual detection methods.CONCLUSION The CA19-9,CA72-4,CEA and AFP tumor markers combined with multimodal MRI have high sensitivity and specificity in diagnosing rectal cancer stage and differentiation.Their diagnostic efficacy is significantly better than that of single tests,which can effectively improve the predictive ability of rectal cancer stage and differentiation,provide a more reliable diagnostic reference for clinical practice,and have important clinical significance.展开更多
爱图仕全新Quick Dome系列柔光罩,搭载全新快拆锁扣结构,融入人体工学设计,增加侧向延伸手柄,仅需按压解锁,即可在数秒内完成柔光箱的安装或拆卸。全系列提供90cm、60cm、40cm三种柔光直径,可满足多样拍摄场景需求。其中,Quick Dome 90...爱图仕全新Quick Dome系列柔光罩,搭载全新快拆锁扣结构,融入人体工学设计,增加侧向延伸手柄,仅需按压解锁,即可在数秒内完成柔光箱的安装或拆卸。全系列提供90cm、60cm、40cm三种柔光直径,可满足多样拍摄场景需求。其中,Quick Dome 90/60柔光箱采用卡扣式可拆卸保荣卡口设计,兼容绝大多数配备保荣卡口的影视灯光设备。搭载电影级工业柔光组件,配合独家16杆32面专利结构,构建均匀而立体的光线输出基础。而Quick Dome 40柔光箱则专为爱图仕STORM 80c设计,整体采用8杆高强度钢骨支撑,设计精巧紧凑。其小巧的体型与Mini Pro Lock卡口相结合,大幅提升了移动性与空间适应性。展开更多
文摘2026年1月,索尼Cine Alta V 2分体拓展系统Mini正式上市。其内置CineAltaV 2的8.6K全画幅CMOS传感器,搭配插入式ND滤镜,可创造出色的、富有质感的影像表现。值得一提的是,其头部体积比前一代减小了约70%,更便携的设计为创作者在有限空间进行手持、极限动作等拍摄提供更多的创作自由。除了适应紧凑环境的拍摄外,索尼Cine Alta V 2分体拓展系统Mini还可用于3D、VR拍摄。此外,新品还配备多个安装点,方便轻松连接多种配件,可拆卸的电缆线材质更软、操控更灵活,使拍摄更高效,使用场景更多元。
文摘随着身份认证需求增长,适用于多领域的虹膜识别技术因高准确性成为研究重点。本研究设计了高精度虹膜识别镜头,由四片透镜组成,总长4.00 mm, F#2.4,采用Optic Studio ZEMAX软件仿真。仿真结果显示,镜头MTF在关键频率下大于0.6,畸变小于0.6%,相对照度稳定。该设计满足虹膜识别高精度要求,同时结合教学实践,提升了学生光学设计与工程能力。此研究为虹膜识别镜头开发提供了参考,也为案例教学奠定了基础。
基金Supported by the Zhejiang Provincial Natural Science Foundation of China,No.LTGY24H160006Jiaxing Medical Key Discipline,No.2023-ZC-015.
文摘BACKGROUND Rectal cancer is one of the common digestive system malignant tumors around the world.Its early diagnosis and staging are crucial for rectal cancer treatment and prognosis.In recent years,tumor markers have gradually received attention in early screening,treatment monitoring and prognostic evaluation of cancer,but their predictive role in rectal cancer staging and differentiation is still unclear.AIM To assess the prognostic value of tumor markers alpha-fetoprotein(AFP)cancer antigen 72-4(CA72-4),carbohydrate antigen 19-9(CA19-9),and carcinoembryonic antigen(CEA),alongside multimodal magnetic resonance imaging(MRI),for staging and differentiating rectal cancer in patients.METHODS This study retrospectively analyzed 167 patients with rectal cancer who were treated at our institution from January 2020 to December 2024.Each patient underwent serological testing and multimodal MRI for diagnosis.Histopathological examination after surgical resection or imaging based on follow-up was used as the gold standard.According to the T stage and differentiation degree,patients were divided into low stage group(T1-T2)and high stage group(T3-T4).In addition,they were divided into low-differentiation groups and high-differentiation groups according to their differentiation degree.We compared the accuracy,sensitivity and specificity of tumor marker levels and MRI in rectal cancer stage and differentiation.RESULTS The study's findings indicate that in the context of rectal cancer T staging,there is substantial concordance between MRI and clinicopathological assessments,with a Kappa coefficient of 0.789(P<0.001).Similarly,for various degrees of tumor differentiation,MRI and clinicopathological evaluations demonstrated substantial agreement,with a Kappa coefficient of 0.651(P<0.001).Notably,the concentrations of tumor markers CA19-9,CA72-4,CEA,and AFP were significantly elevated in the T3-T4 stage compared to the T1-T2 stage.Furthermore,these markers were significantly higher in the low-differentiation group compared to the high-differentiation group(P<0.05).The combined use of tumor markers and MRI for preoperative T staging of rectal cancer yielded a diagnostic sensitivity of 93.7%and a specificity of 94.6%,as evidenced by the receiver operating characteristic analysis,with an area under the curve of 0.947.For tumor differentiation,the diagnostic sensitivity and specificity were 93.6%and 97.1%,respectively,with an area under the curve of 0.978(95%confidence interval:0.946-1.000),surpassing the accuracy of individual detection methods.CONCLUSION The CA19-9,CA72-4,CEA and AFP tumor markers combined with multimodal MRI have high sensitivity and specificity in diagnosing rectal cancer stage and differentiation.Their diagnostic efficacy is significantly better than that of single tests,which can effectively improve the predictive ability of rectal cancer stage and differentiation,provide a more reliable diagnostic reference for clinical practice,and have important clinical significance.
文摘爱图仕全新Quick Dome系列柔光罩,搭载全新快拆锁扣结构,融入人体工学设计,增加侧向延伸手柄,仅需按压解锁,即可在数秒内完成柔光箱的安装或拆卸。全系列提供90cm、60cm、40cm三种柔光直径,可满足多样拍摄场景需求。其中,Quick Dome 90/60柔光箱采用卡扣式可拆卸保荣卡口设计,兼容绝大多数配备保荣卡口的影视灯光设备。搭载电影级工业柔光组件,配合独家16杆32面专利结构,构建均匀而立体的光线输出基础。而Quick Dome 40柔光箱则专为爱图仕STORM 80c设计,整体采用8杆高强度钢骨支撑,设计精巧紧凑。其小巧的体型与Mini Pro Lock卡口相结合,大幅提升了移动性与空间适应性。
