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荧光单分子的频率域纳米级快速定位算法及其在超分辨荧光成像中的应用

Fast Fourier-Domain Localization Algorithm of Single Molecule with Nanometer Resolution for Super-Resolution Fluorescence Imaging

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摘要

为了解决现有单分子定位算法中定位速度慢和对噪声有评估依赖性的问题,基于补零快速傅里叶变换和相位梯度算子提出一种新型的噪声自由的频率域非迭代荧光单分子定位算法。计算机模拟结果表明该算法定位精度可达纳米量级,而定位速度与解线性方程组法在同一个数量级。进而在传统实验参数条件下,对不同间隔分子带模型进行了模拟超分辨成像。模拟结果表明,可以区分中心相隔30 nm的两个分子带。此外,将该算法用于HeLa细胞突起中微丝束结构的荧光超分辨成像,从重构获得的图像中可以看到微丝束的直径为75~200 nm,验证了该算法的实用性。

Abstract

In order to improve the computational speed and prior background noise-dependent problem of single molecule localization algorithm, a Fourier domain localization scheme based on zero-padded fast Fourier transform and phase gradient operators is used to obtain a powerful mathematical model for localizing a single molecule without numerical fitting. Numerical simulations indicate that the proposed method exhibits nanometer scale localization precision while executing almost as fast as the fluoroBancroft algorithm. Furthermore, a sample consisted of several lines of molecules are simulated imaged. The results demonstrate that two lines of molecules separated by 30 nm can be resolved. Finally, super-resolution images of filopodia in HeLa cells are reconstructed based on the method, in which filopodia with diameter of 75~200 nm are resolved.

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中图分类号:TH742

DOI:10.3788/aos201232.0218001

所属栏目:显微

责任编辑:韩峰  信息反馈

基金项目:国家自然科学基金(61178080,60878053,61078067,11004136)和深圳市科技计划基础研究计划项目(JC200903130329A)资助课题。

收稿日期:2011-07-15

修改稿日期:2011-08-31

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作者单位    点击查看

于斌:深圳大学光电工程学院教育部/广东省光电子器件与系统重点实验室, 广东 深圳 518060
陈丹妮:深圳大学光电工程学院教育部/广东省光电子器件与系统重点实验室, 广东 深圳 518060
刘磊:深圳大学光电工程学院教育部/广东省光电子器件与系统重点实验室, 广东 深圳 518060
屈军乐:深圳大学光电工程学院教育部/广东省光电子器件与系统重点实验室, 广东 深圳 518060
牛憨笨:深圳大学光电工程学院教育部/广东省光电子器件与系统重点实验室, 广东 深圳 518060

联系人作者:于斌(yubin@szu.edu.cn)

备注:于斌(1976—),男,博士,副研究员,主要从事成像光谱学和超分辨成像等方面的研究。

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引用该论文

Yu Bin,Chen Danni,Liu Lei,Qu Junle,Niu Hanben. Fast Fourier-Domain Localization Algorithm of Single Molecule with Nanometer Resolution for Super-Resolution Fluorescence Imaging[J]. Acta Optica Sinica, 2012, 32(2): 0218001

于斌,陈丹妮,刘磊,屈军乐,牛憨笨. 荧光单分子的频率域纳米级快速定位算法及其在超分辨荧光成像中的应用[J]. 光学学报, 2012, 32(2): 0218001

被引情况

【1】蔡欢庆,匡翠方,王轶凡,葛剑虹,刘旭. 基于宽场随机荧光漂白的超分辨显微方法. 中国激光, 2013, 40(11): 1110001--1

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