8,652 results match your criteria: "Center for Biomedical Imaging[Affiliation]"

Mesothelin expression prediction in pancreatic cancer based on multimodal stochastic configuration networks.

Med Biol Eng Comput

December 2024

Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518071, China.

Predicting tumor biomarkers with high precision is essential for improving the diagnostic accuracy and developing more effective treatment strategies. This paper proposes a machine learning model that utilizes CT images and biopsy whole slide images (WSI) to classify mesothelin expression levels in pancreatic cancer. By combining multimodal learning and stochastic configuration networks, a radiopathomics mesothelin-prediction system named RPMSNet is developed.

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Neuroimaging markers and disability scales in multiple sclerosis: A systematic review and meta-analysis.

PLoS One

December 2024

Department of Neurology, Jacobs Comprehensive MS Treatment and Research Center, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY, United States of America.

Background: Multiple sclerosis (MS) is a central nervous system disorder marked by progressive neurological impairments. Magnetic resonance imaging (MRI) parameters are key paraclinical measures that play a crucial role in the diagnosis, prognosis, and monitoring of MS-related disability. This study aims to analyze and summarize the existing literature on the correlation between MRI parameters and disability in people with MS (pwMS).

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Introduction: Malnutrition is a leading cause of death for persons living with X-linked dystonia-parkinsonism (XDP), a degenerative disease endemic to the Philippines. Difficulty swallowing has been linked to malnutrition in other populations; however, knowledge of this relationship is limited in XDP. As such, the purpose of this study was to determine the association between dysphagia and malnutrition in this population.

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First-in-human Evaluation of Safety and Dosimetry of [Cu]FBP8: A fibrin-binding PET Probe.

Mol Imaging Biol

December 2024

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, 149 Thirteen St. Suite 2301, Boston, MA, 02129, USA.

Article Synopsis
  • - The study investigates the safe use and distribution of a new imaging probe called [Cu]Fibrin Binding Probe #8 ([Cu]FBP8) in healthy individuals, focusing on its potential for thrombus imaging and pulmonary fibrosis detection.
  • - Eight participants underwent PET/MRI sessions after receiving the probe, which showed quick blood clearance and renal excretion, with the urinary bladder and kidneys receiving the highest radiation doses.
  • - Findings suggest that [Cu]FBP8 has low dosimetry, rapid clearance, and low background signal, making it a promising tool for non-invasive imaging in various medical conditions related to cardiovascular, cancer, and neurological issues.
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Transparent ultrasonic transducers based on relaxor ferroelectric crystals for advanced photoacoustic imaging.

Nat Commun

December 2024

Electronic Materials Research Laboratory, Key Lab of Education Ministry and State Key Laboratory for Mechanical Behavior of Materials, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, China.

Article Synopsis
  • - Photoacoustic imaging is a non-invasive technique useful for research and clinical diagnosis, but achieving high resolution and fast frame rates is difficult.
  • - A new transparent ultrasonic transducer design using advanced piezoelectric materials has been developed to improve image quality, achieving a frequency of 28.5 MHz and a significant increase in sensitivity—four times better than existing options.
  • - This innovation allows for improved monitoring of microvasculature in the brain during seizures, with enhanced signal-to-noise ratios, potentially advancing the effectiveness of photoacoustic imaging systems.
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Article Synopsis
  • Colorectal cancer (CRC) remains the top cause of cancer-related deaths globally, prompting a study on metabolic differences in colorectal cancer tissues (CCT) compared to distant noncancerous tissues (DNT) across different stages and sites.
  • NMR-based metabolomics identified significant alterations in metabolic pathways, including glucose, one-carbon, and amino acid metabolism, with specific biomarker metabolites like glucose and glutamate distinguishing between early and advanced stages of CCT.
  • The findings highlight the varied metabolic characteristics in colorectal cancer, suggesting the potential for using these metabolites in early detection methods.
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  • Portable low-field magnetic resonance imaging (LF-MRI) offers a promising way to assess Alzheimer's disease (AD) patients in places where traditional MRI isn't available, despite some limitations in image quality.
  • * Researchers optimized LF-MRI techniques and created a free machine learning tool for analyzing brain structure and white matter changes in patients with cognitive impairments.
  • * The study found that LF-MRI accurately measures hippocampal volumes and white matter hyperintensities, suggesting that this technology can improve access to neuroimaging for dementia patients at a lower cost.
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Adults and children with cholestatic liver disease are at risk for type C hepatic encephalopathy (HE) and may present lifelong neurocognitive impairment. While the underlying cellular and molecular mechanisms are still incompletely understood, ammonium and bile acids (BAs) seem to play a key role in this pathology, by crossing the blood-brain-barrier and modifying neuronal homeostasis and synaptic plasticity. This experimental study aimed to investigate the effects of ammonium and BAs on dendritic spines of rat hippocampal CA1 neurons.

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Intracranial aneurysm instability prediction model based on 4D-Flow MRI and HR-MRI.

Neurotherapeutics

November 2024

Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China. Electronic address:

This study aims to develop a reliable predictive model for assessing intracranial aneurysm (IA) instability by utilizing four-dimensional flow magnetic resonance imaging (4D-Flow MRI) and high-resolution MRI (HR-MRI). Initially, we curated a prospective dataset, dubbed the primary cohort, by aggregating patient data that was consecutively enrolled across two centers from November 2018 to November 2021. Unstable aneurysms were defined as those with symptoms, morphological change or ruptured during follow-up periods.

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Transcranial focused ultrasound stimulation (tFUS) has emerged as a promising therapeutic strategy for mitigating brain injury in animal models. In this study, the effects and mechanisms of tFUS on ischemic stroke were explored in a transient middle cerebral artery occlusion (MCAO) rat model. Low-intensity tFUS was administered to the ischemic hemisphere 24 h post-MCAO for seven consecutive days.

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Tract-Specific White Matter Hyperintensities Disrupt Brain Networks and Associated With Cognitive Impairment in Mild Traumatic Brain Injury.

Hum Brain Mapp

December 2024

The Key Laboratory of Biomedical Information Engineering, Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China.

Article Synopsis
  • Traumatic brain injury (TBI) leads to cerebrovascular issues and various neurodegenerative conditions, with this study focusing on mild TBI (mTBI) and its effects on cognitive function through imaging and assessments.
  • MRI data from 85 mTBI patients and 52 healthy controls showed that increased white matter hyperintensity (WMH) volumes, particularly in specific brain regions, correlate with disrupted brain dynamics and cognitive impairments.
  • Results indicated that each 1 mL increase in WMH volume linked to significant delays in cognitive processing, highlighting the role of small vessel lesions in affecting brain function post-mTBI.
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Here, we report onset latencies for multisensory processing of letters in the primary auditory and visual sensory cortices. Healthy adults were presented with 300-ms visual and/or auditory letters (uppercase Roman alphabet and the corresponding auditory letter names in English). Magnetoencephalography (MEG) evoked response generators were extracted from the auditory and visual sensory cortices for both within-modality and cross-sensory activations; these locations were mainly consistent with functional magnetic resonance imaging (fMRI) results in the same subjects.

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Neurochemical characterization of 5-HTR partial agonists with simultaneous PET-MRI.

J Cereb Blood Flow Metab

November 2024

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, USA.

Article Synopsis
  • This study investigates the effects of different serotonin 2A receptor (5-HTR) agonists, such as psilocybin, lisuride, and 25CN-NBOH, to understand their potential in psychedelic drug applications.
  • Using advanced imaging techniques like PET and phMRI on nonhuman primates, the researchers evaluated how these agonists affect brain blood flow and receptor occupancy.
  • Findings suggest that mixed agonists like psilocybin and lisuride create complex blood volume responses while 25CN-NBOH leads to simpler responses, shedding light on how these drugs could be used to treat psychiatric disorders.
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Diffusion-weighted MRI is our most promising method for estimating microscopic tissue morphology in vivo. The signal acquisition is based on scanner-generated external magnetic gradients. However, it will also be affected by susceptibility-induced internal magnetic gradients caused by interactions between the tissue and the static magnetic field of the scanner.

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Claustrum volumes are lower in schizophrenia and mediate patients' attentional deficits.

Biol Psychiatry Cogn Neurosci Neuroimaging

November 2024

Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Technical University of Munich, Ismaninger Str. 22, 81675 Munich, Germany; TUM-NIC Neuroimaging Center, School of Medicine, Technical University of Munich, Ismaninger Str. 22, 81675 Munich, Germany; Department of Psychiatry, School of Medicine, Technical University of Munich, Ismaninger Str. 22, 81675 Munich, Germany.

Background: While the last decade of extensive research revealed the prominent role of the claustrum for mammalian forebrain organization, i.e., widely distributed claustral-cortical circuits coordinate basic cognitive functions such as attention, it is poorly understood whether the claustrum is relevant for schizophrenia and related cognitive symptoms.

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Article Synopsis
  • - The study examined radiation exposure in 30 patients with gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) treated with [Lu]Lu-DOTA-TATE in China, focusing on radiation safety for patients and healthcare workers.
  • - Researchers measured external dose rates and radiation doses to nurses and surroundings during and after treatment, determining safe contact times for patients' family members and coworkers post-therapy.
  • - The findings established guidelines for when patients can resume daily interactions with others and confirmed that radiation exposure to medical staff and the hospital environment remained below national safety limits.
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Article Synopsis
  • An organ-specific PET scanner can achieve similar sensitivity and higher spatial resolution than whole-body PET scanners by using fewer detectors, which helps to lower costs and improve image clarity.
  • The development focuses on creating high-resolution depth encoding PET detectors with better timing and fewer signal processing channels, allowing for affordable scanners tailored for specific organs.
  • The study employs a combination of silicon photomultiplier (SiPM) arrays and lutetium yttrium orthosilicate (LYSO) arrays to optimize crystal identification, measure interaction depth, and enhance coincidence timing resolutions for improved imaging accuracy.
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Manganese-based type I collagen-targeting MRI probe for in vivo imaging of liver fibrosis.

Res Sq

November 2024

Athinoula A. Martinos Center for Biomedical Imaging, Institute for Innovation in Imaging (i), Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, USA.

Liver fibrosis is a common pathway shared by all forms of progressive chronic liver disease. There is an unmet clinical need for noninvasive imaging tools to diagnose and stage fibrosis, which presently relies heavily on percutaneous liver biopsy. Here we explored the feasibility of using a novel type I collagen-targeted manganese (Mn)-based MRI probe, Mn-CBP20, for liver fibrosis imaging.

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Cross-dataset Evaluation of Dementia Longitudinal Progression Prediction Models.

medRxiv

November 2024

Centre for Sleep and Cognition (CSC) & Centre for Translational Magnetic Resonance Research (TMR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore.

Accurate Alzheimer's Disease (AD) progression prediction is essential for early intervention. The TADPOLE challenge, involving 92 algorithms, used multimodal biomarkers to predict future clinical diagnosis, cognition, and ventricular volume. The winning algorithm, FROG, utilized a Longitudinal-to-Cross-sectional (L2C) transformation to convert variable longitudinal histories into fixed-length feature vectors, which contrasted with most existing approaches that fitted models to entire longitudinal histories, e.

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Article Synopsis
  • * Researchers used fast fMRI-EEG techniques to study how sleep deprivation affects brain function and discovered that cerebrospinal fluid (CSF) flow mimicking sleep patterns disrupts cognitive processes while awake.
  • * The study suggests that CSF flow is linked to attention levels, with increased flow during attention lapses, indicating a complex relationship between fluid dynamics and brain function, which implies the need for recovery periods in the brain when sleep-deprived.
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Evaluation of Brain Age as a Specific Marker of Brain Health.

bioRxiv

November 2024

Centre for Sleep and Cognition & Centre for Translational MR Research, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.

Brain age is a powerful marker of brain health. Furthermore, brain age models are trained on large datasets, thus giving them a potential advantage in predicting outcomes - much like the success of finetuning large language models for specific applications. However, it is also well-accepted in machine learning that models trained to directly predict specific outcomes (i.

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Purpose: To investigate the incremental benefit of adding radiomic features to conventional semantic radiological feature-based differential diagnosis between benign and malignant lung nodules.

Methods: From May 2017 to March 2021, 393 patients with 465 pathologically confirmed lung nodules were enrolled with 54 patients with 54 lung nodules as external testing. Based on manually segmented lung nodules, 1409 radiomics features were extracted.

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Article Synopsis
  • Anxiety disorders are common and typically treated with cognitive behavioral therapy and medication, but some patients don’t respond well to these methods.
  • A clinical trial involving 76 individuals with acrophobia tested the effectiveness of intermittent theta burst stimulation (iTBS) combined with virtual reality exposure therapy, finding a significant reduction in phobic symptoms.
  • However, the study concluded that iTBS did not provide additional benefits over a placebo version, suggesting the need for more personalized TMS approaches and further research to optimize treatment.
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