Optical Fourier techniques for medical image processing and phase contrast imaging.
Optical Fourier techniques for medical image processing and phase contrast imaging.
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DOI：
10.1016/j.optcom.2007.05.072
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发表时间：
2008-04
影响因子：
2.4
通讯作者：
C. Yelleswarapu;Sri-Rajasekhar Kothapalli;D. Rao
中科院分区：
文献类型：
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作者：
C. Yelleswarapu;Sri-Rajasekhar Kothapalli;D. Rao
本文简要回顾了光学傅立叶技术 (OFT) 的基础知识以及在医学图像处理以及活体生物样本相差成像方面的应用。增强乳房X光检查中的微钙化以早期诊断乳腺癌是主要焦点。讨论了用于处理乳房X线照片的各种空间滤波技术，例如使用空间掩模的传统4f滤波、感光材料中的光致偏振旋转、傅立叶全息术和光学材料的非线性传输特性。我们还回顾了如何利用强度相关折射率作为相位滤波器，用于相干光源的相衬成像。这种新颖的方法代表了相差显微镜的重大进步。
This paper briefly reviews the basics of optical Fourier techniques (OFT) and applications for medical image processing as well as phase contrast imaging of live biological specimens. Enhancement of microcalcifications in a mammogram for early diagnosis of breast cancer is the main focus. Various spatial filtering techniques such as conventional 4f filtering using a spatial mask, photoinduced polarization rotation in photosensitive materials, Fourier holography, and nonlinear transmission characteristics of optical materials are discussed for processing mammograms. We also reviewed how the intensity dependent refractive index can be exploited as a phase filter for phase contrast imaging with a coherent source. This novel approach represents a significant advance in phase contrast microscopy.