نتایج جستجو برای: fmri

تعداد نتایج: 36356  

Journal: :Medical image analysis 2013
Xin Zhang Lei Guo Xiang Li Tuo Zhang Dajiang Zhu Kaiming Li Hanbo Chen Jinglei Lv Changfeng Jin Qun Zhao Lingjiang Li Tianming Liu

Both resting state fMRI (R-fMRI) and task-based fMRI (T-fMRI) have been widely used to study the functional activities of the human brain during task-free and task-performance periods, respectively. However, due to the difficulty in strictly controlling the participating subject's mental status and their cognitive behaviors during R-fMRI/T-fMRI scans, it has been challenging to ascertain whethe...

2014
Jodie R. Gawryluk Erin L. Mazerolle Ryan C. N. D'Arcy

Functional magnetic resonance imaging (fMRI) is a non-invasive technique that allows for visualization of activated brain regions. Until recently, fMRI studies have focused on gray matter. There are two main reasons white matter fMRI remains controversial: (1) the blood oxygen level dependent (BOLD) fMRI signal depends on cerebral blood flow and volume, which are lower in white matter than gray...

Journal: :Stereotactic and functional neurosurgery 2015
Eric C Leuthardt Monica Allen Mudassar Kamran Ammar H Hawasli Abraham Z Snyder Carl D Hacker Timothy J Mitchell Joshua S Shimony

Currently, functional magnetic resonance imaging (fMRI) facilitates a preoperative awareness of an association of an eloquent region with a tumor. This information gives the neurosurgeon helpful information that can aid in creating a surgical strategy. Typically, task-based fMRI has been employed to preoperatively localize speech and motor function. Task-based fMRI depends on the patient's abil...

Journal: :Physics in medicine and biology 2006
Chang-Hwan Im Soo Yeol Lee

fMRI-constrained EEG/MEG source imaging can be a powerful tool in studying human brain functions with enhanced spatial and temporal resolutions. Recent studies on the combination of fMRI and EEG/MEG have suggested that fMRI prior information could be readily implemented by simply imposing different weighting factors to cortical sources overlapping with the fMRI activations. It has been also rep...

تشخیص به موقع و صحیح اختلال دوقطبی (BD) و متعاقب آن انجام فرایندهای درمانی، برای جلوگیری از پیشرفت و وخیم شدن این بیماری ضروریست. اگرچه استفاده از داده‏های مبتنی بر تصویربرداری تشدید مغناطیسی عملکردی در حال استراحت (rs-fMRI) و ویژگی‏های استخراج شده از آن‏ها ممکن است نقش مؤثری در تشخیص اختلال دوقطبی داشته باشد، اما تاکنون تحقیقات اندکی بر روی تشخیص افراد مبتلا به BD به کمک rs-fMRI صورت گرفته است...

Journal: :Algorithms 2021

Functional connectivity (FC) studies have demonstrated the overarching value of studying brain and its disorders through undirected weighted graph functional magnetic resonance imaging (fMRI) correlation matrix. However, most work with FC depends on way is computed, it further manual post-hoc analysis matrices. In this work, we propose a deep learning architecture BrainGNN that learns structure...

Journal: :International review of neurobiology 2005
V Menon S Crottaz-Herbette

NATIONAL REVIEW OF 291 OBIOLOGY, VOL. 66 Copyright 2005, Elsev All rights re 0.1016/S0074-7742(05)66010-2 0074-7742/05 II. T he Signals A. E EG B. f MRI III. T he Relation Between EEG and fMRI Signals IV. N onsimultaneous and Simultaneous EEG and fMRI Data Acquisition A. N onsimultaneous EEG–fMRI Acquisition B. S imultaneous EEG–fMRI Acquisition C. f MRI Data Acquisition V. A rtifact Reduction ...

Journal: :The Japanese Journal of Rehabilitation Medicine 1998

Journal: :Alzheimers & Dementia 2023

Background Changes in functional MRI (fMRI) have been associated with Alzheimer’s disease and other neurological disorders. Quality control (QC) of images prior to their computational analysis is a key step clinical trial workflow, it traditionally implemented visually by image analysts. However, the number acquired from large studies makes neuroimaging QC difficult task that diverts skilled re...

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