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    • 10. 发明申请
    • Multifocal imaging systems and method
    • 多焦点成像系统及方法
    • US20070057211A1
    • 2007-03-15
    • US11442702
    • 2006-05-25
    • Karsten BahlmanKi-Hean KimTimothy RaganPeter So
    • Karsten BahlmanKi-Hean KimTimothy RaganPeter So
    • G03B42/08
    • G01N21/6452G01N21/6458G01N21/6486G02B21/002G02B21/0032G02B21/0076G02B21/16
    • In the systems and methods of the present invention a multifocal multiphoton imaging system has a signal to noise ratio (SNR) that is reduced by over an order of magnitude at imaging depth equal to twice the mean free path scattering length of the specimen. An MMM system based on an area detector such as a multianode photomultiplier tube (MAPMT) that is optimized for high-speed tissue imaging. The specimen is raster-scanned with an array of excitation light beams. The emission photons from the array of excitation foci are collected simultaneously by a MAPMT and the signals from each anode are detected using high sensitivity, low noise single photon counting circuits. An image is formed by the temporal encoding of the integrated signal with a raster scanning pattern. A deconvolution procedure taking account of the spatial distribution and the raster temporal encoding of collected photons can be used to improve decay coefficient. We demonstrate MAPMT-based MMM can provide significantly better contrast than CCD-based existing systems.
    • 在本发明的系统和方法中,多焦点多光子成像系统具有在成像深度等于样本的平均自由路径散射长度的两倍的信噪比(SNR)下降一个数量级以上。 基于区域检测器的MMM系统,例如针对高速组织成像而优化的多节点光电倍增管(MAPMT)。 样品用激发光束阵列进行光栅扫描。 来自激发焦点阵列的发射光子由MAPMT同时收集,并且使用高灵敏度,低噪声单光子计数电路检测来自每个阳极的信号。 通过具有光栅扫描图案的积分信号的时间编码形成图像。 考虑到收集的光子的空间分布和光栅时间编码的去卷积过程可以用来改善衰变系数。 我们演示基于MAPMT的MMM可以提供比基于CCD的现有系统更好的对比度。