2016/01/14 第4期

1.Improved motion contrast and processing efficiency in OCT angiography using complex-correlation algorithm

简评:这篇文章的第一作者是我师妹的男朋友(==),这篇文章的通讯作者是我导师的学生,也可以说是我的师兄,可是我没见过他,但我挑选这篇文章的时候并不会看作者和title。好了言归正传,对生物组织成像的OCT系统来说,「Motion」可以说是一个挥之不去的阴影,本来分辨率很高的结果就经常被模糊(blurred),一般通过后期算法补偿。该文章提出的帧间复相关算法,可以并行处理血流信号提取和体积图像移动,经由活体动物验证。

2.Study on internal to surface fingerprint correlation using optical coherence tomography and internal fingerprint extraction

简评:又一针对指纹扫描的文章,我之前的博客「这是Apple离我的专业最近的一次」讲过FF-OCT在指纹识别中的运用。文章直指内部指纹的获取,那篇博客也讲述过外部指纹的「突起」容易丢失、变形,而内部指纹是有指向性生长和不易遭到窃取的优势。该文章利用传统OCT测得深度方向信息,我个人认为还是不如FF-OCT有优势啊。

3.Real-time high-speed motion blur compensation system based on back-and-forth motion control of galvanometer mirror

简评:似乎我很喜欢补偿模糊和实时成像的文章,毕竟是在实际应用之前一定要解决的问题,需要多多关注。该文章利用振镜再行驶过程中角度的变化来补偿。但它是用在生活环境中的,比如摄像机放在车上进行移动拍摄的情况。实际最高速度为30km/h,局限在于只能补偿一维移动。

4.Wide-field fluorescence molecular tomography with compressive sensing based preconditioning

简评:荧光全场和结构照明结合的文章,旨在解决光学逆问题

The inverse problem in optics (or the inverse optics problem[1]) refers to the fundamentally ambiguous mapping between sources of retinal stimulation and the retinal images that are caused by those sources.[2]

For example, the size of an object, the orientation of the object, and its distance from the observer are conflated in the retinal image. For any given projection on the retina there are an infinite number of pairings of object size, orientation and distance that could have given rise to that projection on the retina. Because the image on the retina does not specify which pairing did in fact cause the image, this and other aspects of vision qualify as an inverse problem.

5.High-speed 3D imaging using two-wavelength parallel-phase-shift interferometry

简评:以色列的研究小组,曾经专注在FF-OCT的空间相干成像中,利用大数值孔径显微物镜和空间相干性得到超分辨,好像是全场分辨率最高的。但比较偏理论。该文章设计了双波长并行移相干涉仪。不要以为CCD越多成像速度越快,对准就是一个大问题,随之而来的成本也上去了,得不偿失。但这种科研精神值得赞扬。

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