Article
Engineering, Electrical & Electronic
Wenxiu Zhao, Haibo Yu, Yangdong Wen, Pan Li, Xiaoduo Wang, Feifei Wang, Yang Yang, Lianqing Liu, Wen Jung Li
Summary: By applying the acoustic echo effect, the performance of photoacoustic imaging technique can be improved with enhanced axial positioning accuracy and signal-to-noise ratio. Experimental results show that using a multiwall carbon nanotubes composite structure as a sample can enhance echo signals and increase SNR within a working distance when water is used as the medium. Additionally, this method can also enhance photoacoustic images of red blood cells.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Geochemistry & Geophysics
Tianqi Shi, Xin Ma, Ge Han, Zhipeng Pei, Hao Xu, Haowei Zhang, Wei Gong
Summary: In this study, we propose a method to improve the accuracy and precision of CO2 concentration profiles measurements in DIAL. This method combines conditional adjustment with Chebyshev fitting to reduce the error of the retrieved results in the atmospheric boundary layer with a high signal-to-noise ratio. Simulation experiments and real case examinations demonstrate the effectiveness and applicability of our method.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Acoustics
Emelina P. Vienneau, Kathryn A. Ozgun, Brett C. Byram
Summary: Thermal noise and acoustic clutter degrade ultrasonic image quality and cannot be separately measured in vivo. We derived and validated a method to quantify the individual contributions of thermal noise and acoustic clutter to image degradation by leveraging coherence characteristics.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Computer Science, Hardware & Architecture
Jinlong Zhang, Shengye Huang
Summary: This study investigates the performance of the reverse link using visible light communication in urban street environments. By classifying signal transmitting schemes, establishing mathematical models, proposing a method to improve link quality, and conducting simulations, the study provides valuable insights for enhancing the quality of reverse visible light communication links.
JOURNAL OF SUPERCOMPUTING
(2022)
Article
Clinical Neurology
Masahiro Tanji, Yohei Mineharu, Akihiko Sakata, Sachi Okuchi, Yasutaka Fushimi, Masahiro Oishi, Yukinori Terada, Noritaka Sano, Yukihiro Yamao, Yoshiki Arakawa, Kazumichi Yoshida, Susumu Miyamoto
Summary: This study aimed to investigate the association between preoperative intratumoral susceptibility signal (ITSS) grade and hemorrhage after stereotactic biopsy (STB). The results showed that ITSS grade was significantly associated with the size of postoperative hemorrhage after STB.
JOURNAL OF NEUROSURGERY
(2023)
Article
Multidisciplinary Sciences
Endri Stoja, Simon Konstandin, Dennis Philipp, Robin N. Wilke, Diego Betancourt, Thomas Bertuch, Juergen Jenne, Reiner Umathum, Matthias Guenther
Summary: MRI technology has been hindered by technical and physiological limitations, but dynamic metamaterials are considered a promising solution to expand its potential and overcome limitations. A new type of metamaterial is able to significantly improve MRI imaging performance while ensuring patient safety.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Petroleum
C. Urdaneta, A. Jarrot, S. Wang, X. Wu, J. Chen
Summary: This study explores the use of deep learning methods to improve the signal-to-noise ratio (SNR) in electromagnetic (EM) telemetry. The optimized models successfully enhance SNR in EM telemetry data, outperforming traditional filter methods.
Article
Engineering, Electrical & Electronic
Yingkun Huang, Weidong Jin, Liang Li
Summary: In this paper, a new wavelet shrinkage operator is proposed for removing noise in non-linear time series. The operator introduces a universal threshold to differentiate the details of signal and noise, effectively reducing noise in chaotic time series and improving the classification accuracy of bearing faults in noisy environments.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Yapo Abole Serge Innocent Oboue, Yunfeng Chen, Sergey Fomel, Wei Zhong, Yangkang Chen
Summary: Strong noise can disrupt the recorded seismic waves and negatively impact subsequent seismological processes. To improve the signal-to-noise ratio (S/N) of seismological data, we introduce MATamf, an open-source MATLAB code package based on an advanced median filter (AMF) that simultaneously attenuates various types of noise and improves S/N. Experimental results demonstrate the usefulness and advantages of the proposed AMF workflow in enhancing the S/N of a wide range of seismological applications.
COMPUTERS & GEOSCIENCES
(2024)
Article
Environmental Sciences
Yunlong Luo, Fangjie Qi, Christopher T. Gibson, Yongjia Lei, Cheng Fang
Summary: This research utilizes Raman imaging to characterize microplastics and nanoplastics released from a dish sponge, identifying the particles as mainly Nylon PA6 and polyethylene terephthalate. The use of principal component analysis enhances the signal-noise ratio and enables reliable capture and visualization of released microplastics and nanoplastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Computer Science, Information Systems
Zubair Jeelani, Fasel Qadir
Summary: This paper presents salt-and-pepper noise filters based on modifications of outer totalistic cellular automata (OTCA) with adaptive neighborhood, which provides efficient noise filtration at varying noise densities. Comparative analysis with standard and CA-based filters in terms of PSNR and SSIM is also presented.
JOURNAL OF KING SAUD UNIVERSITY-COMPUTER AND INFORMATION SCIENCES
(2022)
Article
Physics, Multidisciplinary
Rui Li, Jiaying Hong, Xi Zhou, Chengming Wang, Zhengyu Chen, Bin He, Zhangwei Hu, Ning Zhang, Qin Li, Ping Xue, Xiao Zhang
Summary: Fourier single-pixel imaging utilizes Fourier transform principles to acquire and reconstruct images, without the need for detector arrays, achieving a high signal-to-noise ratio up to N times the dynamic range. This technique presents a significant improvement over traditional imaging methods.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Ke Wu, Xiaoguang Zhao, Thomas G. Bifano, Stephan W. Anderson, Xin Zhang
Summary: Auxetics, with a negative Poisson's ratio, are utilized to design tunable metamaterials for MRI applications, enabling frequency tunability through electromagnetic interaction modification. The metamaterials fabricated using 3D printing technology show an approximate 20 MHz frequency shift during deformation, resulting in a significant boost in MRI signal-to-noise ratio.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Chang Sheng Lee, Minghui Li, Yaolong Lou, Ravinder Dahiya
Summary: This article proposes a hybrid technique combining wavelet-based total variation (WATV) and empirical Wiener denoising method to enhance the signal-to-noise ratio (SNR) of lung sound signals. The technique takes into account both significant and insignificant wavelet coefficients of the noisy signal, resulting in improved SNR compared to state-of-the-art filters. The proposed method achieves an improvement of 3-20 dB in SNR, and is less sensitive to the variation of SNR values. The technique also shows similar SNR performance for different types of lung sound signals in simulation and experimental studies.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Environmental
Yunlong Luo, Christopher T. Gibson, Clarence Chuah, Youhong Tang, Ravi Naidu, Cheng Fang
Summary: This study successfully visualizes microplastics and nanoplastics released from trimmer lines using Raman imaging, and provides a method for capturing and identifying these plastics with increased signal-noise ratio.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Oncology
Anna Maria Grimaldi, Marco Salvatore, Carlo Cavaliere
Summary: Our analysis provides a snapshot of the current scenario regarding EVs as potential clinical biomarkers in resistant prostate cancer. Nevertheless, despite many efforts, the use of EV biomarkers in PCa is currently at an early stage: none of the selected EV biomarkers goes beyond preclinical studies, and their translatability is yet far from clinical settings.
PROSTATE CANCER AND PROSTATIC DISEASES
(2023)
Article
Psychology, Experimental
Giovanni Federico, Francois Osiurak, Maria Antonella Brandimonte, Marco Salvatore, Carlo Cavaliere
Summary: This study investigated the visual encoding modalities of participants in a free-observation task using eye-tracking. The results showed that participants allocated their visual-spatial attention differently to the manipulation and functional areas of objects over time. The repetition of stimuli significantly decreased attention to the functional areas, while attention to the manipulation areas remained stable.
PSYCHOLOGICAL RESEARCH-PSYCHOLOGISCHE FORSCHUNG
(2023)
Article
Psychiatry
Felice Iasevoli, Luigi D'Ambrosio, Mariateresa Ciccarelli, Annarita Barone, Valeria Gaudieri, Sirio Cocozza, Giuseppe Pontillo, Arturo Brunetti, Alberto Cuocolo, Andrea de Bartolomeis, Sabina Pappata
Summary: In this study, FDG-PET was used to compare the cerebral glucose metabolism in patients with treatment resistant schizophrenia (TRS) and schizophrenia responders (nTRS), as well as controls. The results showed that TRS patients exhibited altered metabolism in certain brain regions that were not affected in nTRS patients, suggesting a more severe disrupted functional brain network associated with disorganization symptoms. Additionally, Clz-nR patients showed more significant metabolic reduction compared to Clz-R patients.
SCHIZOPHRENIA BULLETIN
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Giuseppe Palma, Laura Cella, Serena Monti
Summary: This paper introduces the Multi-pAradigM voxel-Based Analysis (MAMBA) toolbox, which is designed for flexible application of VB analysis in medical imaging and radiation oncology. The toolbox provides open-source functions to compute VB statistical models, derive significance maps using non-parametric permutation inference, and allows for the inclusion of various explanatory variables. The use of MAMBA was demonstrated through realistic examples on a synthetic dataset. MAMBA is freely available for academic and non-commercial use, providing a user-friendly solution for VB analysis.
Article
Clinical Neurology
A. Scaravilli, M. Tranfa, G. Pontillo, F. Falco, C. Criscuolo, M. Moccia, S. Monti, R. Lanzillo, V. Brescia Morra, G. Palma, M. Petracca, E. Tedeschi, A. Elefante, A. Brunetti, S. Cocozza
Summary: This study aimed to evaluate the long-term impact of gadolinium retention in the dentate nuclei on motor and cognitive disability in patients with MS. The findings showed no significant association between gadolinium retention and long-term motor or cognitive outcomes in these patients.
AMERICAN JOURNAL OF NEURORADIOLOGY
(2023)
Review
Neurosciences
Giuseppina Ciccarelli, Giovanni Federico, Giulia Mele, Angelica Di Cecca, Miriana Migliaccio, Ciro Rosario Ilardi, Vincenzo Alfano, Marco Salvatore, Carlo Cavaliere
Summary: Neurofeedback (NF) is a biofeedback technique that uses brain activations to modify emotional, cognitive, and behavioral functions. EEG and fMRI are often used separately in NF, but few studies have combined both techniques. This systematic review of 17 EEG-fMRI-NF studies found a lack of homogeneity, making it difficult to draw conclusions about the therapeutic efficacy of NF. More research is needed to fully understand the potential of EEG-fMRI-NF for neurological conditions.
FRONTIERS IN HUMAN NEUROSCIENCE
(2023)
Article
Neurosciences
Mario Tranfa, Felice Iasevoli, Sirio Cocozza, Mariateresa Ciccarelli, Annarita Barone, Arturo Brunetti, Andrea de Bartolomeis, Giuseppe Pontillo
Summary: This study explores the neural substrates of verbal memory impairment in schizophrenia and finds altered connectivity in structural and functional brain networks of patients compared to healthy controls. The aberrant connectivity of sensorimotor networks may be a biomarker of verbal memory impairment in schizophrenia.
HUMAN BRAIN MAPPING
(2023)
Article
Clinical Neurology
Moira Marizzoni, Peppino Mirabelli, Elisa Mombelli, Luigi Coppola, Cristina Festari, Nicola Lopizzo, Delia Luongo, Monica Mazzelli, Daniele Naviglio, Jean-Louis Blouin, Marc Abramowicz, Marco Salvatore, Michela Pievani, Annamaria Cattaneo, Giovanni B. Frisoni
Summary: This study investigates the association between gut microbiota and the amyloid cascade in sporadic AD, and examines the potential mediators of the microbiota-gut-brain axis. It finds that specific bacterial genera are associated with immune and endothelial markers, and these markers are associated with amyloid cascade markers in sporadic AD.
ALZHEIMERS RESEARCH & THERAPY
(2023)
Article
Neurosciences
Vincenzo Alfano, Carlo Cavaliere, Angelica Di Cecca, Giuseppina Ciccarelli, Marco Salvatore, Marco Aiello, Giovanni Federico
Summary: This study used resting-state functional magnetic resonance imaging to investigate the functional connectivity of networks involved in interoception between males and females. The results showed that there is a difference in interoceptive ability between biological sexes, with females exhibiting higher scores. Significant correlations were found between interoception scores and functional connectivity in the Salience network and fronto-temporo-parietal brain areas, with a stronger prevalence in females. These findings suggest a female advantage in attention towards internal bodily sensations and highlight common inter-network areas involved in creating the sense of self.
FRONTIERS IN NEUROSCIENCE
(2023)
Article
Physiology
Marika Valentino, Vittorio Bianco, Lisa Miccio, Pasquale Memmolo, Valentina Brancato, Paolo Libretti, Marcello Gambacorta, Marco Salvatore, Pietro Ferraro
Summary: Kidney microscopy is essential for studying the morphology, physiology, and pathology of kidney tissues, providing important results for diagnosis. Fourier Ptychography (FP) is a microscopy technique that offers high-resolution images and a wide field of view, making it an attractive option for histopathology. This study presents the first comprehensive collection of kidney tissue images captured by an FP microscope, demonstrating the potential of FP microscopy in clinical practice for kidney histopathology.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Clinical Neurology
Martina Di Stasi, Sirio Cocozza, Sara Buccino, Chiara Paolella, Linda Di Napoli, Alessandra D'Amico, Daniela Melis, Lorenzo Ugga, Gianmichele Villano, Manuel Ruocco, Iris Scala, Arturo Brunetti, Andrea Elefante
Summary: The possible relation between the volume of Unidentified Bright Objects (UBOs), cognitive impairment, and language disability in Neurofibromatosis type 1 (NF1) patients was investigated. The study found a lack of correlation between UBOs volume and both cognitive impairment and language disability.
ACTA NEUROLOGICA BELGICA
(2023)
Article
Immunology
Takato Kusakabe, Woan-Yu Lin, Jin-Gyu Cheong, Gagandeep Singh, Arjun Ravishankar, Stephen T. Yeung, Marissa Mesko, Meghan Bialt DeCelie, Guilhermina Carriche, Zhen Zhao, Sophie Rand, Itai Doron, Gregory G. Putzel, Stefan Worgall, Melissa Cushing, Lars Westblade, Giorgio Inghirami, Christopher N. Parkhurst, Chun-Jun Guo, Michael Schotsaert, Adolfo Garcia-Sastre, Steven Z. Josefowicz, Mirella Salvatore, Iliyan D. Iliev
Summary: This study found that patients with severe COVID-19 had elevated levels of Candida albicans immunoglobulin G (IgG) antibodies, intestinal Candida overgrowth, mycobiota dysbiosis, and systemic neutrophilia. Transcriptional changes in antifungal immunity pathways and reprogramming of granulocyte myeloid progenitors (GMPs) were observed in patients with severe COVID-19. Mouse models confirmed the impact of C. albicans colonization on lung neutrophilia and pulmonary NETosis during SARS-CoV-2 infection. Patients treated with tocilizumab experienced sustained reductions in C. albicans IgG antibodies titers and GMP transcriptional changes.
Article
Medicine, General & Internal
Chen Chen, Sairam Parthasarathy, Jacqueline M. Leung, Michelle J. Wu, Katherine A. Drake, Vanessa K. Ridaura, Howard C. Zisser, William A. Conrad, Victor F. Tapson, James N. Moy, Christopher R. Defilippi, Ivan O. Rosas, Bellur S. Prabhakar, Mujeeb Basit, Mirella Salvatore, Jerry A. Krishnan, Charles C. Kim
Summary: A longitudinal assessment of symptoms in patients with acute SARS-CoV-2 infection revealed three different phenotypic clusters of Post-acute sequelae of SARS-CoV-2 infection (PASC): remittent, persistent, and incident. The incident phenotype was characterized by the absence of symptoms during acute illness and had a higher proportion of participants with PASC. The administration of systemic corticosteroids during acute infection was associated with PASC at 3 months.
FRONTIERS IN MEDICINE
(2023)
Correction
Radiology, Nuclear Medicine & Medical Imaging
Giuseppe Pontillo, Maria Petracca, Serena Monti, Mario Quarantelli, Roberta Lanzillo, Teresa Costabile, Antonio Carotenuto, Fabio Tortora, Andrea Elefante, Vincenzo Brescia Morra, Arturo Brunetti, Giuseppe Palma, Sirio Cocozza
EUROPEAN RADIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Giuseppe Pontillo, Maria Petracca, Serena Monti, Mario Quarantelli, Roberta Lanzillo, Teresa Costabile, Antonio Carotenuto, Fabio Tortora, Andrea Elefante, Vincenzo Brescia Morra, Arturo Brunetti, Giuseppe Palma, Sirio Cocozza
Summary: In this study, we found that patients with multiple sclerosis (MS) have widespread R1 changes, brain atrophy, and limited changes in tissue chi. Additionally, the atrophy and chi changes are related to global and motor disability, while the R1 changes are meaningful correlates of cognition.
EUROPEAN RADIOLOGY
(2023)