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生成对抗网络加速超分辨率超声定位显微成像方法研究 被引量:4
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作者 隋怡晖 郭星奕 +3 位作者 郁钧瑾 alexander ASolovev 他得安 许凯亮 《物理学报》 SCIE EI CAS CSCD 北大核心 2022年第22期143-154,共12页
超快超声定位显微成像(uULM),突破了传统超声衍射极限,可实现分辨率远小于发射波长的在体深层微血管精准成像.通过对微血管中数以万计的运动微泡进行中心点定位和轨迹追踪, uULM技术可重建微血管图像.通常一张uULM图像需要数十秒甚至数... 超快超声定位显微成像(uULM),突破了传统超声衍射极限,可实现分辨率远小于发射波长的在体深层微血管精准成像.通过对微血管中数以万计的运动微泡进行中心点定位和轨迹追踪, uULM技术可重建微血管图像.通常一张uULM图像需要数十秒甚至数百秒的连续长程图像采集,这在一定程度上限制了其更广泛的临床应用.针对这一挑战,本研究在阐明了超声衍射极限、超分辨率定位理论方法的基础上,给出了基于傅里叶环相关的分辨率测定原理和实现方法,并结合传统uULM重建技术,发展了一种基于生成对抗网络的深度学习超分辨超声成像方法,以缩减uULM对图像采集时长的依赖,提高成像速度和成像分辨率.针对大鼠脑的在体数据分析结果表明,基于生成对抗网络的超声定位显微技术微血管分辨达到10μm,在保持较高超声成像空间分辨率和图像饱和度的同时,数据采集时间缩减一半,从而显著降低了uULM对图像数据采集时长的依赖.相关深度学习模型连接轨迹的计算复杂度较小,且避免了人工调参以及轨迹筛选,为加速超分辨率uULM微血流成像和提升uULM成像分辨率提供了一种有效的工具.相关思路与方法对促进超分辨率uULM成像技术发展具有一定的借鉴意义. 展开更多
关键词 超分辨率 超声定位显微 卷积神经网络 生成对抗网络
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Photonic properties and applications of multi-functional organo-lanthanide complexes:Recent advances 被引量:1
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作者 Virender Archana Chauhan +5 位作者 Ashwani Kumar Gurjaspreet Singh alexander a.solovev Jichuan Xiong Xuefeng Liu Brij Mohan 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第1期16-27,I0001,共13页
Lanthanides(Ln(Ⅲ))based compounds as light-emitting materials have emerged as successful agents in high-performance defense and lighting systems,magnets,bio-markers,and circuitry.Therefore,they have recently gained m... Lanthanides(Ln(Ⅲ))based compounds as light-emitting materials have emerged as successful agents in high-performance defense and lighting systems,magnets,bio-markers,and circuitry.Therefore,they have recently gained much attention as energy-saving and cost-effective luminescent materials and their applications in analyte detection.The present review summarizes powerful features and recent developments of organo-lanthanide complexes in lighting applications with a particular focus on visible light emitters,including Eu(Ⅲ),Tb(Ⅲ),Sm(Ⅲ),and Dy(Ⅲ)ions.In addition,this review discusses the most relevant aspects of photosensitization,such as the structure,property,functionalization of primary and secondary ligands,and molecular geometry.In addition,coordination sites of organo-lanthanide complexes and their applications collectively contribute to the improved performance of innovative luminescent materials.Finally,the current challenges and key recommendations for advancing organolanthanides in material science are provided. 展开更多
关键词 LANTHANIDES ORGANOMETALLIC LUMINESCENT LIFETIME OLED Rare earths
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