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Constraints in embryonic development are thought to bias the direction of evolution by making some changes less likely, and others more likely, depending on their consequences on ontogeny. Here, we characterize the constraints acting on…

Populations and Evolution · Quantitative Biology 2012-03-08 J. Roux , M. Robinson-Rechavi

Optical coherence tomography (OCT) is being increasingly adopted as a label-free and non-invasive technique for biomedical applications such as cancer and ocular disease diagnosis. Diagnostic information for these tissues is manifest in…

Accurate assessment of spheno-occipital synchondrosis (SOS) maturation is a key indicator of craniofacial growth and a critical determinant for orthodontic and surgical timing. However, SOS staging from cone-beam CT (CBCT) relies on subtle,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Omid Halimi Milani , Amanda Nikho , Marouane Tliba , Lauren Mills , Emadeldeen Hamdan , Ahmet Enis Cetin , Mohammed H. Elnagar

Purpose: To develop a deep learning approach to digitally-stain optical coherence tomography (OCT) images of the optic nerve head (ONH). Methods: A horizontal B-scan was acquired through the center of the ONH using OCT (Spectralis) for 1…

Fiber-form optics extends the high-resolution tomographic imaging capabilities of Optical Coherence Tomography (OCT) to the inside of the human body, i.e., endoscopic OCT. However, it still faces challenges due to the trade-off between…

Optics · Physics 2024-09-04 Chengfu Gu , Haoran Zhang , Qi Lan , Weiyi Zhang , Chang Liu , Jianlong Yang

Forward-viewing endoscopic optical coherence tomography (OCT) provides 3D imaging in vivo, and can be combined with widefield fluorescence imaging by use of a double-clad fiber. However, it is technically challenging to build a…

The zebrafish is a valuable model organism for studying cardiac development and diseases due to its many shared aspects of genetics and anatomy with humans and ease of experimental manipulations. Computational fluid-structure interaction…

Tissues and Organs · Quantitative Biology 2025-06-23 Alexander D. Kaiser , Jing Wang , Aaron L. Brown , Enbo Zhu , Tzung Hsiai , Alison L. Marsden

Optical coherence tomography (OCT) has seen widespread success as an in vivo clinical diagnostic 3D imaging modality, impacting areas including ophthalmology, cardiology, and gastroenterology. Despite its many advantages, such as high…

Optical Coherence Tomography Angiography (OCTA) is a non-invasive imaging technique that provides high-resolution cross-sectional images of the retina, which are useful for diagnosing and monitoring various retinal diseases. However, manual…

Image and Video Processing · Electrical Eng. & Systems 2023-11-07 Can Koz , Onat Dalmaz , Mertay Dayanc

A robust model for simulating speckle pattern evolution in optical coherence tomography (OCT) depending on the OCT system parameters and tissue deformation is reported. The model is based on application of close to reality procedures used…

Medical Physics · Physics 2014-11-04 V. Yu. Zaitsev , L. A. Matveev , A. L. Matveyev , G. V. Gelikonov , V. M. Gelikonov

Understanding the photodamage mechanism underlying the highly nonlinear dynamic of femtosecond laser pulses at the second transparent window of tissue is crucial for label-free microscopy. Here, we report the identification of two…

Eye movements are commonly seen as an obstacle to high-resolution ophthalmic imaging. In this context we study the natural axial movements of the in vivo human eye and show that they can be used to modulate the optical phase and retrieve…

Dynamic full-field optical coherence tomography (D-FFOCT) has recently emerged as a label-free imaging tool, capable of resolving cell types and organelles within 3D live samples, whilst monitoring their activity at tens of milliseconds…

The tracing of neural pathways through large volumes of image data is an incredibly tedious and time-consuming process that significantly encumbers progress in neuroscience. We are exploring deep learning's potential to automate…

Computer Vision and Pattern Recognition · Computer Science 2018-09-05 Ishtar Nyawira , Kristi Bushman , Iris Qian , Annie Zhang

Background: Cervical cancer seriously affects the health of the female reproductive system. Optical coherence tomography (OCT) emerged as a non-invasive, high-resolution imaging technology for cervical disease detection. However, OCT image…

Image and Video Processing · Electrical Eng. & Systems 2022-06-14 Kaiyi Chen , Qingbin Wang , Yutao Ma

Optical coherence tomography angiography (OCTA) is a non-invasive imaging modality that can acquire high-resolution volumes of the retinal vasculature and aid the diagnosis of ocular, neurological and cardiac diseases. Segmenting the…

Since the introduction of optical coherence tomography (OCT), it has been possible to study the complex 3D morphological changes of the optic nerve head (ONH) tissues that occur along with the progression of glaucoma. Although several deep…

Optical coherence tomography (OCT) is a powerful technology for rapid volumetric imaging in biomedicine. The bright field imaging approach of conventional OCT systems is based on the detection of directly backscattered light, thereby…

We investigated a new optical approach for the detection of the coagulation dynamic process by means of the information on the optical vortex. In our study, laser speckle was captured using a high-speed CMOS camera, and the statistical…

Medical Physics · Physics 2021-05-20 Yaowen Zhang , Jiaxing Gong , Hui Zhang , Qi Li , Guangbin Ren , Wenjian Lu , Jing Wang

Larval zebrafish exhibit a variety of complex undulatory swimming patterns. This repertoire is controlled by the 300 neurons projecting from brain into spinal cord. Understanding how descending control signals shape the output of spinal…

Neurons and Cognition · Quantitative Biology 2007-05-23 Scott A. Hill , Xiao-Ping Liu , Melissa A. Borla , Jorge V. Jose , Donald M. O'Malley