项目名称: 适用于肿瘤血管生成的亚微米分辨率活体光声成像研究
项目编号: No.61205203
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 信息四处
项目作者: 宋亮
作者单位: 中国科学院深圳先进技术研究院
项目金额: 27万元
中文摘要: 肿瘤血管生成不仅是癌症发生的重要标志,也是其治疗的重要靶标。开展肿瘤血管生成的深入研究,对开发新的癌症诊断与治疗策略,具有重大意义。光声成像无需外部标记即可对微血管进行高分辨率、高对比度的在体成像,而且能够测量血流、血氧、氧代谢等重要生理参数,有潜力为肿瘤血管生成的研究提供方法上的革新。但是,现有的最高(亚微米)分辨率的光声成像技术只能进行透射式成像,难以在实体肿瘤的研究中获得广泛应用。本项目拟在光、声能量传输的物理和系统层面上对光声成像方法重新设计,利用高数值孔径物镜和微型高频超声换能器,研发反射模式的亚微米分辨率光声成像方法。在此基础上,开发具有表面高度动态反馈功能的三维光声扫描技术,并通过光声多普勒和光声光谱等方法,获取血管生成的多种形态与功能信息,使研发的技术能够被广泛用于实体肿瘤的研究。最后,通过一系列的活体光声成像研究,为制定肿瘤血管生成的光声成像标准提供基础与依据。
中文关键词: 肿瘤血管新生;光声显微成像;亚波长分辨率;血管形态量化;
英文摘要: Angiogenesis is both a hallmark and an important therapeutic target of cancer. Optical-resolution photoacoustic microscopy (OR-PAM), which provides label-free imaging of vascular architecture and functions-including the microvessel size, density, blood flow, oxygenation, and the metabolic rate of oxygen-with extremely high sensitivity and resolution, can potentially become a powerful imaging tool for tumor angiogenesis study. However, current OR-PAM of the highest (submicron) resolution exists only in transmission mode, imposing serious limitations when used for solid tumor study. In this proposal, with a new design combining the use of a high N.A. microscope objective, a miniature high-frequency ultrasonic transducer, and a novel 3D scanning scheme with dynamic feedback of the skin contour, we aim to develop a reflection-mode submicron-resolution PAM for in vivo imaging of solid tumor angiogenesis. Furthermore, we will: (1) perform serial PAM studies of tumor angiogenesis, (2) compare the imaging results with histology, and (3) establish an initial standard for photoacoustic imaging of angiogenesis.
英文关键词: Angiogenesis;Photoacoustic Microscopy;Subwavelength resolution;Microvascular quantification;