A5023714847- Optical Coherence Tomography Applications
- Retinal and Macular Surgery
- Photoacoustic and Ultrasonic Imaging
- Advanced Fluorescence Microscopy Techniques
- Plant Pathogens and Fungal Diseases
- Retinal Diseases and Treatments
- Spectroscopy and Chemometric Analyses
- Retinal Imaging and Analysis
- Image Processing Techniques and Applications
- Glaucoma and retinal disorders
- Ophthalmology and Visual Impairment Studies
- Adaptive optics and wavefront sensing
- Ocular and Laser Science Research
- Energy Harvesting in Wireless Networks
- Intraocular Surgery and Lenses
- Advanced MIMO Systems Optimization
- Advanced Neural Network Applications
- Phytoplasmas and Hemiptera pathogens
- Ear Surgery and Otitis Media
- Vehicle License Plate Recognition
- Laser Applications in Dentistry and Medicine
- Advanced Optical Sensing Technologies
- Caching and Content Delivery
- Photonic and Optical Devices
- Spectroscopy Techniques in Biomedical and Chemical Research
NED University of Engineering and Technology
2023-2025
Massachusetts General Hospital
2024
Medical University of Vienna
2018-2022
Tarbiat Modares University
2019
Kyungpook National University
2013-2018
An application of spectral domain optical coherence tomography (SD-OCT) was demonstrated for a fast industrial inspection an thin film panel. sample similar to liquid crystal display (LCD) panel examined. Two identical SD-OCT systems were utilized parallel scanning complete in half time. Dual OCT heads transverse (fast) scanning, while stable linear motorized translational stage used lateral (slow) scanning. The cross-sectional and volumetric images acquired detect the defects glass other...
Efficient pedestrian detection plays an important role in many practical daily life applications, such as autonomous cars, video surveillance, and intelligent driving assistance systems. The main goal of systems, especially vehicles, is to prevent accidents. By recognizing pedestrians real time, these systems can alert drivers or even autonomously apply brakes, minimizing the possibility collisions. However, occlusion a major obstacle detection. Pedestrians are typically occluded by trees,...
We have demonstrated the application of optical coherence tomography (OCT) in diagnosis growth and spread gray leaf spot disease Capsicum annuum caused by fungus Stemphylium lycopersici . Using 2D cross-sectional 3D volumetric images OCT, vivo study layer differences between infected leaves healthy was observed with distinctive features. that internal layers disease-affected parts seem to merge forming a single thick layer. The obtained OCT results verify noninvasive ability fungal...
Using adaptive optics optical coherence tomography, human photoreceptors and retinal pigment epithelium (RPE) cells are typically visualized on a small field of view ∼1° to 2°. In addition, volume averaging is required for visualizing the RPE cell mosaic. To increase imaging area, we introduce lens based spectral domain AO-OCT system that shows low aberrations within an extended area 4°×4° while maintaining high (theoretical) transverse resolution (at >7 mm pupil diameter) in order 2 µm. A...
We present a compact multi-modal and multi-scale retinal imaging instrument with an angiographic functional extension for clinical use. The system integrates scanning laser ophthalmoscopy (SLO), optical coherence tomography (OCT) OCT angiography (OCTA) modalities provides fields of view. For high resolution, lateral resolution in particular, cellular correction aberrations by adaptive optics (AO) is employed. entire has design the head mounted on motorized translation stages that enable 3D...
A method for depth enhancement is presented using a bidirectional imaging modality spectral domain optical coherence tomography (SD-OCT). Two precisely aligned sample arms along with two reference were utilized in the configuration to scan samples. Using exemplary images of resolution target, Scotch tape, silicon sheet needles, and leaf, we demonstrated how developed SD-OCT increases ability characterize depth-enhanced images. The results system validated by comparing standard OCT...
Abstract The tremendous advances achieved in the biophotonics technologies have intensified necessity for non-invasive modalities that can characterize diverse biological materials with increased sensitivity and resolution. Optical coherence tomography (OCT) is one of techniques has been applied applications medicine agriculture to identify structural properties. Herein, we report successful incorporation OCT identification morphological changes occur as a result bitter rot disease, through...
Motion artefacts from involuntary changes in eye fixation remain a major imaging issue optical coherence tomography (OCT). This paper reviews the state-of-the-art of retrospective procedures to correct retinal motion and axial OCT imaging. Following an overview induced correction strategies, chronological survey approaches since introduction until current days is presented. Pre-processing, registration, validation techniques are described. The review finishes by discussing limitations...
This research endeavors to advance energy efficiency (EE) within heterogeneous networks (HetNets) through a comprehensive approach. Initially, we establish foundational framework by implementing two-tier network architecture based on Poisson process distribution from stochastic geometry. Through this deployment, develop tailored EE model, meticulously analyzing the implications of random base station and user distributions efficiency. We formulate joint densities that are optimized for while...
The pyramid wavefront sensor (P-WFS) has replaced the Shack-Hartmann (SH-) WFS as of choice for high-performance adaptive optics (AO) systems in astronomy. Many advantages P-WFS, such its adjustable pupil sampling and superior sensitivity, are potentially great benefit AO-supported imaging ophthalmology well. However, so far no high quality ophthalmic AO was achieved using this novel sensor. Usually, a P-WFS requires modulation precision that lead to complexity costs These factors limit...
The structural analysis of nylon/graphene oxide (NY/GO) and polyetherblockamide/ trisilinolphenyl-polyhederal oligomeric silsesquioxane (PEBA/t-POSS) composites were performed using high-resolution spectral domain optical coherence tomography (SD-OCT). This technology revealed both cross-sectional, as well sub-layer depth information sample. non-destructive real-time imaging demonstrated the nature defects in composites. thickness location each defect point measured A-scan on SD-OCT images....
This research addresses the critical need to optimize Energy Efficiency (EE) for Ultra-Dense HetNets amid ever-increasing demands high-speed data networks. The rapid increase in devices highlights urgent necessity a transformative change upcoming 5G cellular According Ericsson's 2022 report, mobile traffic volume is expected double by 2027, with video anticipated rise nearly 30% each year. In response these challenges, researchers have identified essential technologies that facilitate...
Adaptive optics plays an important role in the correction of high-order aberrations to enhance lateral resolution. An OCT system coupled with a programmable phase modulator is designed verify resolution improvement. The Hamamatsu high-reso
We demonstrate that optical coherence tomography (OCT) is a plausible tool for in vivo detection of plant seeds and its morphological changes during growth. To investigate the direct impact salt stress on seed germination, experiment was conducted using Capsicum annuum were treated with different molar concentrations NaCl. determine optimal concentration growth, monitored nine consecutive days. In two-dimensional OCT images obtained compared grown sterile distilled water. The results confirm...
We report a wavelength swept laser-based full-field optical coherence tomography for measuring the surfaces and thicknesses of refractive reflective samples. The system consists galvo filter-based laser simple Michelson interferometer. Combinations samples are used to demonstrate performance system. By synchronizing camera with source, cross-sectional information can be seen after each sweep source. This effective thickness measurement thin films as well depth investigation in industrial...
The non-destructive classification of plant materials using optical inspection techniques has been gaining much recent attention in the field agriculture research. Among them, a near-infrared (NIR) imaging method called coherence tomography (OCT) become well-known agricultural tool since last decade. Here we investigated identification capability OCT to classify diversely stained (with various staining agents) Capsicum annuum seed specimens different cultivars. A swept source (SS-OCT) system...
A wavelength-swept laser is constructed using a free space external cavity configuration coupled with fiber-based ring at the 850 nm region. The filter employs galvo-mirror scanner diffraction grating for wavelength selection. connected to through an optical circulator. contains broadband semiconductor amplifier high output. performance of this demonstrated broad bandwidths and narrow linewidths. 3 dB linewidth bandwidth source are 0.05 (~20 GHz) 48 nm, respectively. maximum output power 26...
This paper implements Standard Particle Swarm Optimization (PSO) and a new algorithm that aims to be better than the classical PSO. An m-file code is used simulate it evaluated using five well known benchmark functions namely Sphere, Ackley, Rastrigin, Rosenbrock, Shcwefel's Problem 2.26. A PSO as Gompertz increasing inertia weight (GIIW) proposed also implemented above. The comparison has been simulated with standard From experiments, shows GIIW gives good performance quick convergence...