Steven Guan

ORCID: 0000-0002-8077-5978
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About
Contact & Profiles
Research Areas
  • Photoacoustic and Ultrasonic Imaging
  • Thermography and Photoacoustic Techniques
  • Advanced X-ray and CT Imaging
  • Anomaly Detection Techniques and Applications
  • Mobile Agent-Based Network Management
  • Atomic and Subatomic Physics Research
  • Artificial Intelligence in Healthcare
  • Optical Imaging and Spectroscopy Techniques
  • IoT and Edge/Fog Computing
  • Advanced MRI Techniques and Applications
  • Topic Modeling
  • Multi-Agent Systems and Negotiation
  • Video Analysis and Summarization
  • Neural Networks and Applications
  • Recommender Systems and Techniques
  • Ultrasound and Hyperthermia Applications
  • Multimedia Communication and Technology
  • Atmospheric and Environmental Gas Dynamics
  • Service-Oriented Architecture and Web Services
  • Evolutionary Algorithms and Applications
  • Face and Expression Recognition
  • Radiomics and Machine Learning in Medical Imaging
  • Metaheuristic Optimization Algorithms Research
  • Cardiac Imaging and Diagnostics
  • Wireless Sensor Networks and IoT

Mitre (United States)
2019-2024

Xi’an Jiaotong-Liverpool University
2011-2023

George Mason University
2019-2023

University of Virginia
2014-2022

Northeast Electric Power University
2022

Guangdong University of Technology
2021

Conference Board
2021

Brunel University of London
2007

National University of Singapore
2002-2006

Photoacoustic imaging is an emerging modality that based upon the photoacoustic effect. In tomography (PAT), induced acoustic pressure waves are measured by array of detectors and used to reconstruct image initial distribution. A common challenge faced in PAT can only be sparsely sampled. Reconstructing sampled data using standard methods results severe artifacts obscure information within image. We propose a modified convolutional neural network (CNN) architecture termed Fully Dense UNet...

10.1109/jbhi.2019.2912935 article EN IEEE Journal of Biomedical and Health Informatics 2019-04-27

Photoacoustic tomography (PAT) is a nonionizing imaging modality capable of acquiring high contrast and resolution images optical absorption at depths greater than traditional techniques. Practical considerations with instrumentation geometry limit the number available acoustic sensors their view target, which result in significant image reconstruction artifacts degrading quality. Iterative methods can be used to reduce but are computationally expensive. In this work, we propose novel deep...

10.1038/s41598-020-65235-2 article EN cc-by Scientific Reports 2020-05-22

Conventional reconstruction methods for photoacoustic images are not suitable the scenario of sparse sensing and geometrical limitation. To overcome these challenges enhance quality reconstruction, several learning-based have recently been introduced tomography reconstruction. The goal this study is to compare systematically evaluate proposed modified networks image Specifically, post-processing model-based learned iterative investigated. In addition comparing differences inherently brought...

10.1016/j.pacs.2021.100271 article EN cc-by-nc-nd Photoacoustics 2021-05-15

Simulation tools for photoacoustic wave propagation have played a key role in advancing imaging by providing quantitative and qualitative insights into parameters affecting image quality. Classical methods numerically solving the equation relies on fine discretization of space can become computationally expensive large computational grids. In this work, we apply Fourier Neural Operator (FNO) networks as fast data-driven deep learning method 2D homogeneous medium. Comparisons between FNO...

10.3390/a16020124 article EN cc-by Algorithms 2023-02-19

Idiopathic pulmonary fibrosis, a pattern of interstitial lung disease, is often clinically unpredictable in its progression. This paper presents hyperpolarized Xenon-129 chemical shift imaging as noninvasive, nonradioactive method probing physiology well anatomy to monitor subtle changes subjects with IPF. Twenty subjects, nine healthy and eleven IPF, underwent HP Xe-129 ventilation MRI 3D-SBCSI. Spirometry was performed on all before imaging, DLCO hematocrit were measured IPF after imaging....

10.3390/tomography7030039 article EN cc-by Tomography 2021-09-15

10.1016/j.asoc.2004.02.001 article EN Applied Soft Computing 2004-03-30

Iterative reconstruction has demonstrated superior performance in medical imaging under compressed, sparse, and limited-view sensing scenarios. However, iterative algorithms are slow to converge rely heavily on hand-crafted parameters achieve good performance. Many iterations usually required reconstruct a high-quality image, which is computationally expensive due repeated evaluations of the physical model. While learned approaches such as model-based learning (MBLr) can reduce number...

10.1016/j.pacs.2023.100452 article EN cc-by-nc-nd Photoacoustics 2023-01-13

3D Single-breath Chemical Shift Imaging (3D-SBCSI) is a hybrid MR-spectroscopic imaging modality that uses hyperpolarized xenon-129 gas (Xe-129) to differentiate lung diseases by probing functional characteristics. This study tests the efficacy of 3D-SBCSI in differentiating physiology among pulmonary diseases. A total 45 subjects—16 healthy, 11 idiopathic fibrosis (IPF), 13 cystic (CF), and 5 chronic obstructive disease (COPD)—were given 1/3 forced vital capacity (FVC) Xe-129, inhaled for...

10.3390/tomography8050215 article EN cc-by Tomography 2022-10-13

In photoacoustic tomography (PAT), the acoustic pressure waves produced by optical excitation are measured an array of detectors and used to reconstruct image. Sparse spatial sampling limited-view detection two common challenges faced in PAT. Reconstructing from incomplete data using standard methods results severe streaking artifacts blurring. We propose a modified convolutional neural network (CNN) architecture termed Dense Dilation UNet (DD-UNet) for correcting 3D The DD-Net leverages...

10.48550/arxiv.2104.03130 preprint EN other-oa arXiv (Cornell University) 2021-01-01

Objective We quantified inflammatory burden in rheumatoid arthritis (RA) synovial tissue by using computer vision to automate the process of counting individual nuclei hematoxylin and eosin images. Methods adapted applied algorithms quantify density (count per unit area tissue) on from arthroplasty samples. A pathologist validated algorithm results labeling images that were mislabeled or missed algorithm. Nuclei was compared with other measures RA inflammation such as semiquantitative...

10.1002/acr2.11381 article EN cc-by-nc ACR Open Rheumatology 2022-01-10

10.1016/j.patrec.2005.04.001 article EN Pattern Recognition Letters 2005-05-27

Simulation tools for photoacoustic wave propagation have played a key role in advancing imaging by providing quantitative and qualitative insights into parameters affecting image quality. Classical methods numerically solving the equation relies on fine discretization of space can become computationally expensive large computational grids. In this work, we apply Fourier Neural Operator (FNO) networks as fast data-driven deep learning method 2D homogeneous medium. Comparisons between FNO...

10.48550/arxiv.2108.09374 preprint EN cc-by arXiv (Cornell University) 2021-01-01

Although bearing fault diagnosis methods based on deep learning are very popular in recent years and a lot of brilliant results have been achieved, they assume that the distribution training samples is same with test samples. However, working condition variable, labeling tags for all data time-consuming laborious. In order to solve problem lacking labeled cross domain scenario, novel adaptation transfer method adversarial network proposed. this method, convolutional neural (CNN) used extract...

10.1109/safeprocess52771.2021.9693742 article EN 2021 CAA Symposium on Fault Detection, Supervision, and Safety for Technical Processes (SAFEPROCESS) 2021-12-17

To avoid confusion, all abbreviations "GQL" throughout the text should be standardized as "GraphQL",

10.1007/s10796-022-10319-9 article EN cc-by Information Systems Frontiers 2022-08-13

A software component is defined as a unit of composition with contractually specified interfaces and explicit dependencies that may be independently deployed. Components form generic, re-usable building blocks, which can composed into applications deployed by third parties. good model therefore must seek to minimize implicit in order maximize re-use composability. The benefits models have led their widespread application the area networked embedded systems particularly Wireless Sensor...

10.1109/nesea.2011.6144945 article EN 2011-12-01

Practitioners and researchers often found the intrinsic representations of high-dimensional problems has much fewer independent variables. However such structure may not be easily discovered due to noises other factors. A supervised transformation scheme RST is proposed transform features into lower dimensional spaces for classification tasks. The algorithm recursively selectively transforms guided by output We compared performance linear classifier random forest on original data sets, sets...

10.1186/s41044-017-0025-5 article EN cc-by Big Data Analytics 2017-12-01

10.1016/j.elerap.2003.08.005 article EN Electronic Commerce Research and Applications 2003-11-15
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