Jim Ji

ORCID: 0000-0001-7147-7920
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About
Contact & Profiles
Research Areas
  • Advanced MRI Techniques and Applications
  • Medical Imaging Techniques and Applications
  • Sparse and Compressive Sensing Techniques
  • Advanced NMR Techniques and Applications
  • Atomic and Subatomic Physics Research
  • Advanced Neuroimaging Techniques and Applications
  • Advanced X-ray Imaging Techniques
  • Muscle Physiology and Disorders
  • Ultrasound Imaging and Elastography
  • NMR spectroscopy and applications
  • Photodynamic Therapy Research Studies
  • Medical Image Segmentation Techniques
  • Photoacoustic and Ultrasonic Imaging
  • AI in cancer detection
  • Photovoltaic System Optimization Techniques
  • Oral Health Pathology and Treatment
  • MRI in cancer diagnosis
  • Solar Radiation and Photovoltaics
  • Microwave Imaging and Scattering Analysis
  • Electron Spin Resonance Studies
  • Solar Thermal and Photovoltaic Systems
  • Image and Object Detection Techniques
  • Laser Applications in Dentistry and Medicine
  • Optical Imaging and Spectroscopy Techniques
  • Brain Tumor Detection and Classification

Texas A&M University
2014-2024

Texas A&M University at Qatar
2018-2024

Peking University People's Hospital
2020

Peking University
2020

Mitchell Institute
2005-2018

Barrick Gold (Canada)
2015

QB3
2014

University of California, Berkeley
2014

University of California, San Francisco
2014

HCA Healthcare
2011

Road surface quality is essential for improving driving experience and reducing traffic accidents. Traditional road condition monitoring systems are limited in their temporal (speed) spatial (coverage) responses needed maintaining overall quality. Several alternative have been proposed that utilize sensors mounted on vehicles. In particular, with the ubiquitous use of smartphones navigation, smartphone-based assessment has emerged as a promising new approach. this paper, we propose to...

10.1109/jsen.2019.2952857 article EN cc-by IEEE Sensors Journal 2019-11-11

Diabetes is a large healthcare burden worldwide. There substantial evidence that lifestyle modifications and drug intervention can prevent diabetes, therefore, an early identification of high risk individuals important to design targeted prevention strategies. In this paper, we present automatic tool uses machine learning techniques predict the development type 2 diabetes mellitus (T2DM). Data generated from oral glucose tolerance test (OGTT) was used develop predictive model based on...

10.1371/journal.pone.0219636 article EN cc-by PLoS ONE 2019-12-11

Brain cancer is a life-threatening disease requiring close attention. Early and accurate diagnosis using non-invasive medical imaging critical for successful treatment patient survival. However, manual by radiologist experts time-consuming has limitations in processing large datasets efficiently. Therefore, efficient systems capable of analyzing vast amounts data early tumor detection are urgently needed. Deep learning (DL) with deep convolutional neural networks (DCNNs) emerges as promising...

10.3390/bioengineering11050410 article EN cc-by Bioengineering 2024-04-23

Abstract Partial parallel imaging (PPI) techniques using array coils and multichannel receivers have become an effective approach to achieving fast magnetic resonance (MRI). This article presents a Matlab toolbox called PULSAR (Parallel Utilizing Localized Surface‐coil Acquisition Reconstruction) that can simulate the data acquisition image reconstruction, analyze performance of five common PPI techniques. sensitivity functions rectangular loop quasi‐static model based on Biot‐Savart's Law...

10.1002/cmr.b.20081 article EN Concepts in Magnetic Resonance Part B 2007-02-01

Spectral variability remains a challenging problem for target detection and classification in hyperspectral (HS) imagery. In this letter, we have applied the nonlinear support vector data description (SVDD) to perform full-pixel detection. Using pure signature first-order Markov model, developed novel pattern recognition algorithm train an SVDD characterize class. We inserted signatures into urban HS scene with varying levels of spectral explore performance proposed detector different...

10.1109/lgrs.2010.2078795 article EN IEEE Geoscience and Remote Sensing Letters 2010-11-10

Multispectral autofluorescence lifetime imaging (maFLIM) can be used to clinically image a plurality of metabolic and biochemical biomarkers oral epithelial dysplasia cancer. This study tested the hypothesis that maFLIM-derived in machine-learning (ML) models discriminate dysplastic cancerous from healthy tissue. Clinical widefield maFLIM endoscopy lesions was performed at two clinical centers. Endoscopic images 34 patients acquired one centers were optimize ML for automated discrimination A...

10.3390/cancers13194751 article EN Cancers 2021-09-23

Purpose To provide visualization of the brachytherapy seeds and differentiation with natural structures in MRI by taking advantage their high magnetic susceptibility to generate positive‐contrast images. Methods The method is based on mapping using an equivalent short‐TE sequence a kernel deconvolution algorithm regularized L 1 minimization. An appealing aspect that signals from surrounding areas where signal noise ratio (SNR) sufficiently are used derive seeds, even though SNR immediate...

10.1002/mrm.25453 article EN Magnetic Resonance in Medicine 2014-09-23

Compressed sensing (CS) is a promising method to speed up MRI. Because most clinical MRI scanners are equipped with multichannel receive systems, integrating CS systems may not only shorten the scan time but also provide improved image quality. However, significant computation required perform reconstruction, whose complexity scaled by number of channels. In this article, we propose reconstruction procedure that uses ubiquitously available multicore central processing unit accelerate from...

10.1002/mrm.22481 article EN Magnetic Resonance in Medicine 2010-06-17

Solar power generation continues to grow as a dominant renewable energy source. Soiling because of dust accumulation is one the important challenges facing large-scale solar photovoltaic (PV) plant operations, particularly, in arid regions. The assessment and mitigation soiling effects on large arrays PV panels are often limited by area coverage how data can be collected. To overcome this limitation, article, we propose method directly use images quantify panels. A prototype lab system image...

10.1109/jphotov.2020.3018257 article EN IEEE Journal of Photovoltaics 2020-09-01

Abstract MR spectroscopic (MRS) images from a large volume of brain can be obtained using 3D echo‐planar imaging (3D‐EPSI) sequence. However, routine applications 3D‐EPSI are still limited by long scan time. In this communication, new approach termed “spectral phase‐corrected generalized autocalibrating partially parallel acquisitions” (SPC‐GRAPPA) is introduced for the reconstruction data to accelerate acquisition while preserving accuracy quantitation metabolites. SPC‐GRAPPA,...

10.1002/mrm.21217 article EN Magnetic Resonance in Medicine 2007-04-24

Chemical exchange saturation transfer (CEST) is an emerging MRI contrast mechanism that capable of noninvasively imaging dilute CEST agents and local properties such as pH temperature, augmenting the routine methods. However, includes a long RF pulse followed by fast image readout, which associated with high specific absorption rate limited spatial resolution. In addition, echo planar (EPI)-based readout prone to distortion, particularly severe at field. To address these limitations, we...

10.1371/journal.pone.0112219 article EN cc-by PLoS ONE 2014-11-10

This paper presents an analysis of the mutual information (MI) metric in rigid-body registration two digital images, particular, local fluctuations MI value due to interpolation. In contrast existing work this area, starts with hypothetical continuous based on which both sampling and interpolation effects are analyzed. indicates that "ideal" interpolator may not be able completely suppress undesirable minima if effect is negligible. Several preprocessing methods discussed for reducing effects.

10.1109/tmi.2003.816957 article EN IEEE Transactions on Medical Imaging 2003-09-01

Compressed Sensing (CS) is a recently emerged technique for reconstructing signals from data sampled under the Nyquist rate. It takes advantage of signal sparsity in transformed domain to reconstruct high-resolution reduced data. This paper presents CS imaging method dynamic magnetic resonance imaging. Specifically, difference operator applied temporal frames enhance spatial reconstruction. The new algorithm was assessed using simulated and in-vivo result shows that can obtain higher...

10.1109/isbi.2008.4541321 article EN 2008-05-01

Both parallel Magnetic Resonance Imaging (pMRI) and Compressed Sensing (CS) can significantly reduce imaging time in MRI, the former by utilizing multiple channel receivers latter sparsity of MR images a transformed domain. In this work, pMRI CS are integrated to take advantages sensitivity information from coils characteristics images. Specifically, is used as regularization method for inverse problem raised based on L1 norm Total Variation (TV) term. We test new with set 8-channel, in-vivo...

10.1109/iembs.2008.4649496 article EN 2008-08-01

To accelerate iterative reconstructions of compressed sensing (CS) MRI from 3D multichannel data using graphics processing units (GPUs).The sparsity signals and parallel array receivers can reduce the acquisition requirements. However, CS acquired an system may take a significantly long time, especially for large number channels. This paper presents efficient method CS-MRI reconstruction GPUs. In this method, were simultaneously processed in channel-by-channel fashion on GPU, which...

10.1002/mrm.26636 article EN publisher-specific-oa Magnetic Resonance in Medicine 2017-02-15

A pilot plant campaign has been conducted by Sherritt Technologies in support of Eldorado Gold Corporation's evaluation pressure oxidation (POX) technology for the treatment refractory gold concentrates from Certej deposit Romania. Preliminary batch tests indicated that extraction oxidised subsequent cyanide leaching was adversely affected presence organic carbon POX feed when chloride solution at an elevated level. As such, process conditions tested were selected to either counteract...

10.1179/1879139515y.0000000018 article EN Canadian Metallurgical Quarterly 2015-05-15

This study aims to develop an accelerated susceptibility-based positive contrast MR imaging method for visualizing compatible metallic devices. A modified fast spin echo sequence is used accelerate data acquisition. Each readout gradient in the slightly shifted by a short distance T shift. Phase changes accumulated within shift are then calculate susceptibility map using kernel deconvolution algorithm with regularized ℓ1 minimization. To evaluate proposed method, three phantom experiments...

10.1088/1361-6560/aa5fa3 article EN cc-by Physics in Medicine and Biology 2017-02-09
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