Article
Chemistry, Analytical
Ryan J. Downey, Daniel P. Ferris
Summary: The goal of this study was to test a novel approach (iCanClean) for removing non-brain sources from scalp EEG data recorded in mobile conditions. The study found that iCanClean consistently outperformed the other three methods in removing artifacts and preserving brain activity, regardless of the type or number of artifacts present.
Article
Engineering, Biomedical
Corey E. Cruttenden, Jennifer M. Taylor, Mahdi Ahmadi, Yi Zhang, Xiao-Hong Zhu, Wei Chen, Rajesh Rajamani
Summary: This paper discusses the use of a reference-free adaptive feedforward method to remove periodic artifacts from neural signals recorded in rats in UHF MRI scanners. The developed cascaded adaptive least squares feedforward algorithm is shown to effectively remove periodic noise in experimental results.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2022)
Article
Materials Science, Characterization & Testing
Markus Wedekind, Susana Castillo, Marcus Magnor
Summary: This article introduces a method for correcting ring artifacts in computed tomography (CT) reconstruction. The method compensates for errors in the gain and offset values of each pixel and reduces blur by inferring information from neighboring pixels. Experimental results show that this method effectively mitigates the shortcomings of purely offset-based approaches and approaches using all projections, and can be efficiently implemented.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2023)
Article
Engineering, Electrical & Electronic
Ji Deng, Jian Li, Hao Feng, Shumeng Ding, Yu Xiao, Wenzhong Han, Zhoumo Zeng
Summary: CBFPP technology relies on obtaining correct fringe orders, but issues often arise around phase jump regions. This paper introduces an edge-preserved fringe order correction strategy that is suitable for various CBFPP types and operates at a high speed.
Article
Computer Science, Interdisciplinary Applications
Rafael C. Schick, Thomas Koehler, Wolfgang Noichl, Fabio De Marco, Konstantin Willer, Theresa Urban, Manuela Frank, Thomas Pralow, Ingo Maack, Sven Prevrhal, Bernd Lundt, Alexander Fingerle, Daniela Pfeiffer, Julia Herzen, Franz Pfeiffer
Summary: Dark-field radiography is a promising imaging technique for early diagnosis of lung diseases, but prolonged image acquisition time can lead to motion artifacts. A motion artifact reduction algorithm was developed and successfully evaluated in simulated chest phantom and in vivo human data, significantly improving the image quality of dark-field chest X-ray radiographs by reducing motion artifacts.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2022)
Article
Physics, Multidisciplinary
Sheng-Xiang Wang, Jie Chen, Zhi-Jian Tan, Si-Hao Deng, Yao-Da Wu, Huai-Le Lu, Shou-Ding Li, Wei-Chang Chen, Lun-Hua He
Summary: The ring correction method based on the projection-field (RCP) proposed in this study effectively reduces ring artifacts in neutron CT without reducing image resolution or over-correction. Simulation and physical experiments verified the effectiveness of the method, which can provide corrected projection data directly and is conducive to efficient data storage and algorithmic research.
Article
Radiology, Nuclear Medicine & Medical Imaging
Leilei Zhou, Hao Liu, Yi-Xuan Zou, Guozhi Zhang, Bin Su, Liyan Lu, Yu-Chen Chen, Xindao Yin, Hong-Bing Jiang
Summary: This study evaluated the clinical performance of an artificial intelligence-based motion correction reconstruction algorithm for cerebral CT. The results showed that the algorithm significantly improved image quality and lesion detectability.
EUROPEAN RADIOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Hormoz Izadi, Scott Keating
Summary: The Born series provides a framework for connecting earth model parameters and a wavefield characterized by perturbation around a known reference wavefield. The inverse scattering series provides both linear and nonlinear expressions for approximating earth model parameters. The linear expression accurately approximates the depth-varying velocity profile with low contrast, while the nonlinear expression is required for higher accuracy.
JOURNAL OF APPLIED GEOPHYSICS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Luca Brombal, Lucia Mariel Arana Pena, Fulvia Arfelli, Renata Longo, Francesco Brun, Adriano Contillo, Francesca Di Lillo, Giuliana Tromba, Vittorio Di Trapani, Sandro Donato, Ralf Hendrik Menk, Luigi Rigon
Summary: The SYRMA-3D collaboration is establishing a breast computed tomography (bCT) clinical program at the Elettra synchrotron radiation facility in Trieste, Italy. This study evaluates and compensates for motion artifacts in synchrotron radiation bCT through an optical tracking approach. Results show that optical tracking procedure can effectively correct motion artifacts and improve the quality of reconstructed CT images.
Article
Operations Research & Management Science
Wilfredo Sosa, Fernanda MP Raupp
Summary: In this article, we introduce the quadratic orthogonal projection problem and propose an iterative algorithm to solve it. Through testing with different quadratic functions, we demonstrate the algorithm's potential in areas such as computer graphics.
Article
Chemistry, Analytical
Hayder R. Al-Omairi, Sebastian Fudickar, Andreas Hein, Jochem W. Rieger
Summary: Functional near-infrared spectroscopy (fNIRS) is a non-invasive neuroimaging technique that allows participants to move freely. An improved algorithmic approach combining wavelet and correlation-based signal improvement (WCBSI) was proposed for motion artifact (MA) correction. The WCBSI algorithm consistently outperformed other correction approaches, demonstrating its potential as the best algorithm for MA correction.
Article
Radiology, Nuclear Medicine & Medical Imaging
Bo Li, Ningzhi Li, Ze Wang, Radu Balan, Thomas Ernst
Summary: An improved method for image reconstruction of simultaneous multislice EPI scans of the brain with motion correction was proposed and evaluated. The method includes updating receiver phase and resampling coil sensitivities to correct motion-induced artifacts and improve temporal SNR.
MAGNETIC RESONANCE IN MEDICINE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jakob M. Slipsager, Stefan L. Glimberg, Liselotte Hojgaard, Rasmus R. Paulsen, Paul Wighton, M. Dylan Tisdall, Camilo Jaimes, Borjan A. Gagoski, P. Ellen Grant, Andre van Der Kouwe, Oline V. Olesen, Robert Frost
Summary: Comparing prospective motion correction (PMC) and retrospective motion correction (RMC) in Cartesian 3D-encoded MPRAGE scans showed that PMC resulted in superior image quality compared to RMC, with increasing correction frequency reducing motion artifacts in RMC.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Engineering, Biomedical
Yahya Moshaei-Nezhad, Ronald Tetzlaff, Matthias Kirsch
Summary: This paper presents a new method for correcting respiration and heartbeat motion artifacts in neurosurgery thermographic images. The method consists of two main steps: separating the local wavelets of the phase using a complex steerable pyramid, and carrying out temporal filtering followed by image reconstruction. The optimized and adjusted-combined local and global (OA-CLG) method is applied to detect and compensate for the motion artifacts. The proposed method preserves the image structures, properties, spatial resolution, and temperature values, as demonstrated by the evaluation on 10 clinical thermographic datasets.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2023)
Article
Geochemistry & Geophysics
Zeng Xiao-Niu, Li Xi-Hai, Yu Xiao-Tong, Liu Ji-Hao, Liu Dai-Zhi
Summary: This paper proposes a method for vertical derivative conversion based on convex sets projection, with the cutoff wavenumber of the filter determined by fitting a fractal model. The improved method shows better processing precision and efficiency compared to conventional methods.
APPLIED GEOPHYSICS
(2021)
Article
Neurosciences
Amelie Haugg, Ronald Sladky, Stavros Skouras, Amalia McDonald, Cameron Craddock, Matthias Kirschner, Marcus Herdener, Yury Koush, Marina Papoutsi, Jackob N. Keynan, Talma Hendler, Kathrin Cohen Kadosh, Catharina Zich, Jeff MacInnes, Alison Adcock, Kathryn Dickerson, Nan-Kuei Chen, Kymberly Young, Jerzy Bodurka, Shuxia Yao, Benjamin Becker, Tibor Auer, Renate Schweizer, Gustavo Pamplona, Kirsten Emmert, Sven Haller, Dimitri van de Ville, Maria-Laura Blefari, Dong-Youl Kim, Jong-Hwan Lee, Theo Marins, Megumi Fukuda, Bettina Sorger, Tabea Kamp, Sook-Lei Liew, Ralf Veit, Maartje Spetter, Nikolaus Weiskopf, Frank Scharnowski
HUMAN BRAIN MAPPING
(2020)
Article
Immunology
Jing Sui, Xiang Li, Ryan P. Bell, Sheri L. Towe, Syam Gadde, Nan-Kuei Chen, Christina S. Meade
Summary: This study investigated the impact of HIV infection on brain structure and function using multimodal MRI scanning and neuropsychological testing. The results showed that individuals living with HIV had lower cognitive functioning and that alterations in brain structure and function could distinguish between HIV-positive and HIV-negative individuals.
CLINICAL INFECTIOUS DISEASES
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Chou-Ming Cheng, Chih-Che Chou, Tzu-Chen Yeh, Hsiao-Wen Chung
Summary: This study investigated the effects of flow acceleration in the superior sagittal sinus on venous oxygen saturation estimations using susceptibility-based MR oximetry. Slice-dependent variations in SvO(2) may be partly explained by flow acceleration, and selecting slices with specific conditions could reduce interscan differences and improve consistency of results.
MAGNETIC RESONANCE IN MEDICINE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Hing-Chiu Chang, Guangtao Chen, Hsiao-Wen Chung, Philip Yuguang Wu, Liyuan Liang, Chun-Jung Juan, Yi-Jui Liu, Man-Lap Donald Tse, Arren Chan, Sailong Zhang, Keith Wan-Hang Chiu
Summary: Comparing conventional ssDWI with higher-resolution ssDWI and MUSE-DWI for evaluating bowel inflammation in CD, it was found that MUSE-DWI has better tissue texture conspicuity, geometric distortions, and overall image quality. MUSE-DWI also showed higher sensitivity and accuracy in detecting bowel inflammation compared to ssDWI.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Review
Radiology, Nuclear Medicine & Medical Imaging
Dean Darnell, Trong-Kha Truong, Allen W. Song
Summary: RF coils are crucial to MRI scanners, driving rapid technological advancements. Recent innovations in flexible, wireless, and integrated coil arrays have greatly improved patient comfort and image quality, signaling an exciting future for MRI technology.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Devin Willey, Dean Darnell, Allen W. Song, Trong-Kha Truong
Summary: The study showed that using iPRES and modifying the cost function effectively reduced signal loss in specific brain regions during gradient-echo EPI, leading to improved imaging quality and signal intensity.
MAGNETIC RESONANCE IN MEDICINE
(2021)
Article
Neurosciences
Amelie Haugg, Fabian M. Renz, Andrew A. Nicholson, Cindy Lor, Sebastian J. Gotzendorfer, Ronald Sladky, Stavros Skouras, Amalia McDonald, Cameron Craddock, Lydia Hellrung, Matthias Kirschner, Marcus Herdener, Yury Koush, Marina Papoutsi, Jackob Keynan, Talma Hendler, Kathrin Cohen Kadosh, Catharina Zich, Simon H. Kohl, Manfred Hallschmid, Jeff MacInnes, R. Alison Adcock, Kathryn C. Dickerson, Nan-Kuei Chen, Kymberly Young, Jerzy Bodurka, Michael Marxen, Shuxia Yao, Benjamin Becker, Tibor Auer, Renate Schweizer, Gustavo Pamplona, Ruth A. Lanius, Kirsten Emmert, Seven Haller, Dimitri van de Ville, Dong-Youl Kim, Jong-Hwan Lee, Theo Marins, Fukuda Megumi, Bettina Sorger, Tabea Kamp, Sook-Lei Liew, Ralf Veit, Maartje Spetter, Nikolaus Weiskopf, Frank Scharnowski, David Steyrl
Summary: The study found that conducting a pre-training no-feedback run before neurofeedback training and training patients instead of healthy participants significantly improved neurofeedback performance. This could be due to participants' familiarity with the neurofeedback setup and task, as well as patients having stronger motivation and more extensive clinical piloting. The results provide guidance for designing more efficient neurofeedback studies specifically for clinical interventions.
Article
Clinical Neurology
Ryan P. Bell, Christina S. Meade, Syam Gadde, Sheri L. Towe, Shana A. Hall, Nan-kuei Chen
Summary: In this study, we investigated the effectiveness of local and nonlocal denoising methods in increasing the sensitivity to detect differences in cerebral white matter (WM) in neuroHIV. The results showed that nonlocal PCA denoising allowed us to detect differences even after a sample reduction, and smaller WM tracts showed greater sensitivity to PCA denoising.
JOURNAL OF NEUROIMAGING
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Nan-kuei Chen, Ryan P. Bell, Christina S. Meade
Summary: The study introduced a numerical procedure for down-sampling diffusion MRI data and a spatial uniformity index to predict the quality of down-sampling schemes. Experimental data showed that the spatial uniformity index is correlated with FA errors from down-sampled data. The FA fitting residuals were found to not be correlated with FA errors or spatial uniformity index.
MAGNETIC RESONANCE IMAGING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jonathan D. Cuthbertson, Trong-Kha Truong, Robert Stormont, Fraser Robb, Allen W. Song, Dean Darnell
Summary: This study develops a wireless integrated coil array for simultaneous imaging and wireless localized B-0 shimming, to correct for distortions in DTI of the spinal cord. The coil modifications do not degrade the SNR and the wireless performance is minimally impacted. The iPRES-W coil array can perform imaging and wireless localized B-0 shimming with no SNR degradation, without any scanner modifications or additional antenna systems within the scanner bore.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Ming-Long Wu, Hsiao-Wen Chung
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Article
Neurosciences
Yixin Ma, Iain P. Bruce, Chun-Hung Yeh, Jeffrey R. Petrella, Allen W. Song, Trong-Kha Truong
Summary: High-resolution diffusion tensor imaging can noninvasively probe the microstructure of cortical gray matter in vivo. A column-based analysis was performed to quantitatively analyze the dependence of fractional anisotropy (FA) and radiality index (RI) on cortical depth, region, curvature, and thickness across the whole brain. The results showed characteristic FA and RI profiles, which can potentially provide quantitative biomarkers for neurological disorders.
Article
Engineering, Biomedical
Chang-Hsien Liu, Hing-Chiu Chang, Yi-Jui Liu, Wei-Ching Lin, Chi-Feng Hsieh, Te-Pao Lin, Cheng-Hsuan Juan, William Tzu-Liang, Chun-Jung Juan
Summary: The purpose of this study was to evaluate the accuracy of the T2*-IDEAL technique in predicting hepatic steatosis grades. The results showed that the T2*-IDEAL method accurately predicts hepatic steatosis grades and has high reliability and consistency.
JOURNAL OF MEDICAL AND BIOLOGICAL ENGINEERING
(2023)
Article
Oncology
Haonan Xiao, Xinyang Han, Shaohua Zhi, Yat-Lam Wong, Chenyang Liu, Wen Li, Weiwei Liu, Weihu Wang, Yibao Zhang, Hao Wu, Ho-Fun Victor Lee, Lai-Yin Andy Cheung, Hing-Chiu Chang, Yen-Peng Liao, Jie Deng, Tian Li, Jing Cai
Summary: In this study, a novel D2R model was developed for deformation estimation of downsampled 4D-MR images, resulting in successful construction of high-quality 4D-MR images. The model exhibited superior registration performance and real-time imaging efficiency, with robustness and generalizability demonstrated in external validation.
RADIOTHERAPY AND ONCOLOGY
(2023)
Article
Neuroimaging
Jie Zhuang, David J. Madden, Priscila Cunha, Alexandra Badea, Simon W. Davis, Guy G. Potter, Eleonora M. Lad, Scott W. Cousins, Nan-Kuei Chen, Kala Allen, Abigail J. Maciejewski, Xuan Duong Fernandez, Michele T. Diaz, Heather E. Whitson
Summary: Age-related macular degeneration (AMD) is a common retina disease associated with cognitive impairment in older adults. Our study found that AMD patients exhibited significantly weaker quantitative anisotropy in specific brain regions compared to healthy controls, but this was not directly linked to visual acuity. The relationship between white matter degeneration in the brain and AMD may be independent of cognitive decline in the participants studied.
NEUROIMAGE-CLINICAL
(2021)