• Continuous real- time functional magnetic resonance imaging (fMRI) neurofeedback is gaining increasing scientific attention in clinical neuroscience and may benefit from the short repetition times of modern multiband echoplanar imaging sequences. (bvsalud.org)
  • Here, we report a technical problem we experienced during continuous fMRI neurofeedback with multiband echoplanar imaging and short repetition times. (bvsalud.org)
  • Robert Turner is among a group of pioneering physicists who helped create magnetic resonance imaging (MRI) and functional Magnetic Resonance Imaging (fMRI), which today is the most widely used method of brain mapping. (wikipedia.org)
  • These findings led to an explosion of interest in fMRI, which depends almost entirely on the use of EPI to investigate human brain function, and the subsequent development of what has come to be known as Imaging Neuroscience. (wikipedia.org)
  • This study aimed to investigate the early changes of global connectivity patterns in T2DM by using a resting-state functional magnetic resonance imaging (rs-fMRI) technique. (frontiersin.org)
  • Here we have combined fMRI with electrical stimulation in a patient undergoing awake brain surgery, to separately probe the functional significance of the human homologs, i.e., area hMT and hMST, on motion perception. (jneurosci.org)
  • These patterns are similar to major functional networks described in humans by resting-state fMRI, such as the lateral task-dependent network putatively anticorrelated with the midline default-mode network. (nature.com)
  • Here, we visualized activations of the cerebellum and extracerebellar regions using high-field fMRI, while we asked participants to observe and imitate images with pictures of human faces expressing different emotional states or with moving geometric shapes as control. (springer.com)
  • Here, we tackled these questions by presenting short video clips of emotion-laden faces to human subjects, while examining the activities of their cerebellum and cortical brain regions using high-field functional magnetic resonance imaging (fMRI) (a 3T MRI scanner). (springer.com)
  • Resting state functional MRI (R-fMRI) is a relatively new and powerful method for evaluating regional interactions that occur when a subject is not performing an explicit task. (humanconnectome.org)
  • Two groups of pulse sequences have revolutionized neuroimaging research, diffusion imaging and functional imaging (fMRI). (humanconnectome.org)
  • We then employed a measure of global resting-state functional brain connectivity and follow-up seed-to-voxel analysis to the fMRI data we acquired. (researchgate.net)
  • In Old World macaque monkeys, Sliwa and Freiwald, 2017 recently identified areas in parietal and frontal cortex that were exclusively activated by the observation of social interactions of other macaques using functional magnetic resonance imaging (fMRI). (elifesciences.org)
  • To test this hypothesis, we presented participants with naturalistic dynamic emotion expressions of the face, the whole body, or the voice in a functional magnetic resonance (fMRI) study. (frontiersin.org)
  • Standard echo planar imaging was used for fast (TR=1s) image acquisition of BOLD and arterial spin labelling (ASL) functional MRI (fMRI) data. (europa.eu)
  • The resting-state functional connectivity (rsFC) method has become a valuable tool for investigating network function, as it allows for a paradigm-free analysis of connectivity in fMRI without a priori assumptions about neural activation [ 18 , 19 ]. (biomedcentral.com)
  • All subjects underwent diffusion tensor imaging (DTI) and functional magnetic resonance imaging (fMRI) scans. (researchsquare.com)
  • For neurologic studies, functional MRI (fMRI) provides high spatiotemporal resolution for localizing brain activity, whereas PET provides neurochemical specificity ( 3 ). (snmjournals.org)
  • Methods MESH EPI is suitable for functional MRI (fMRI) in situations where there is sufficient time to insert an additional EPI readout in the dead time between slice selection and the standard EPI readout. (utwente.nl)
  • A multiple gradient echo, high resolution imaging method is proposed to better visualize different sources of activation in functional magnetic resonance imaging (fMRI) experiments. (mcmaster.ca)
  • The results demonstrate the importance of a multiple gradient echo data acquisition approach in localizing various vascular contributions to brain activation in fMRI. (mcmaster.ca)
  • When a functional MRI study of the brain is performed, about 30 to 60 images covering the entire 3-D brain are repeated hundreds of times like the frames of a movie but, with fMRI, a 3-D movie," Feinberg said. (scienceblog.com)
  • In addition to broadly advancing the field of neural-imaging, the discovery will have an immediate impact on the Human Connectome Project, funded last year by the National Institutes of Health (NIH) to map the connections of the human brain through functional MRI (fMRI) and structural MRI scans of 1,200 healthy adults. (scienceblog.com)
  • Nearly 20 years ago, however, a new type of MRI called functional MRI (fMRI) was developed to highlight areas of the brain using oxygen, and thus presumably engaged in neuronal activity, such as thinking .Using echo planar imaging (EPI), fMRI vividly distinguishes oxygenated blood funneling into working areas of the brain from deoxygenated blood in less active areas. (scienceblog.com)
  • Recordings of brain activation with functional magnetic resonance imaging (fMRI) during gameplay may reflect neuronal correlates of real-life behavior. (ewha.ac.kr)
  • Functional magnetic resonance imaging (fMRI) studies that require high-resolution whole-brain coverage have long scan times that are primarily driven by the large number of thin slices acquired. (umn.edu)
  • Our fMRI package employs Siemens TIM technology to orchestrate full and partial k-space filling and is designed for excellent Parallel Imaging in all directions. (osu.edu)
  • Functional MRI (fMRI) at a high spatial resolution of 75 x 75 x 1000 µm3 can be achieved using high field small animal MR scanners and four-element array coils. (bruker-webdev.de)
  • Functional MRI (fMRI) is a unique tool for studying brain activation in humans and animals. (bruker-webdev.de)
  • Four patients were studied using echo planar imaging sequences and motor and sensory tasks. (ox.ac.uk)
  • Evaluation of conventional (spin and gradient echo) and echo-planar pulse sequences for maximization of MR conspicuity of cardiac chambers and walls, as well as the cardio-thoracic vasculature, including great vessels and coronary vasculature. (upstate.edu)
  • Two-dimensional multiband echo-planar imaging (EPI) sequences accelerate the data acquisition along the slice direction and therefore represent an attractive approach to such studies by improving the temporal resolution without sacrificing spatial resolution. (umn.edu)
  • Gradient-echo and spin-echo sequences (multi-planar or 3D) provide a wide range of tissue contrast (T1-, PD- and T2-weighted contrast) for structural imaging. (osu.edu)
  • Spin-echo sequences (multi-echo/multi-plane, inversion recovery and derivatives). (osu.edu)
  • Fast spin-echo sequences (2D and 3D), which combine the advantages of spin echo techniques with higher resolution and faster acquisition times. (osu.edu)
  • Echo planar imaging (EPI) with a full database of pulse sequences for very rapid acquisitions is ideally suited for functional MRI. (osu.edu)
  • The ability to perform fast pulse sequences (like the echo-planar images used in functional neuroimaging) is determined by the gradient slew rate, which is the gradient strength divided by the rise-time to achieve that strength. (itnonline.com)
  • A high spatial resolution prostate imaging system is being built as a potential competitor to prostate-specific antigen (PSA) screening, by the study's co-authors at Weinberg Medical Physics LLC (a medical device design company in Bethesda, Md.). Functional brain imaging also uses fast sequences, and with high spatial resolution could potentially examine individual neurons. (itnonline.com)
  • By controlling the radiofrequency pulse and gradient waveforms, computer programs produce specific pulse sequences that determine how an image is obtained (weighted) and how various tissues appear. (msdmanuals.com)
  • Recently introduced high-resolution MRI scanners increase image quality and diagnostic accuracy and produce a wide variety of additional pulse sequences to further characterize tissues and tumors. (msdmanuals.com)
  • It should be taken into account that lateralization of this function could be related to functional lateral asymmetry in humans. (europeanproceedings.com)
  • Practical challenges of continuous real-time functional magnetic resonance imaging neurofeedback with multiband accelerated echo-planar imaging and short repetition times. (bvsalud.org)
  • He has been a director and professor at the Max Planck Institute for Human Cognitive and Brain Sciences in Leipzig, Germany, and is an internationally recognized expert in brain physics and magnetic resonance imaging (MRI). (wikipedia.org)
  • Committees: Scientific Advisory Board, Brown University Magnetic Resonance Imaging Facility, Brown University. (wikipedia.org)
  • Seventeen right-handed smokers and 17 nonsmokers watched a popular movie while undergoing functional magnetic resonance imaging. (jneurosci.org)
  • Magnetic resonance imaging (MRI) has additional technical and logistic challenges, such as the necessity for high magnetic fields, problems with motion artefacts, electromagnetic compatibility issues, high costs and lack of portability. (nature.com)
  • Here, we compared functional magnetic resonance imaging activation to self-committed errors during a computer game to a variety of errors committed by others during movie clips ( e.g. , figure skaters falling down and persons behaving inappropriately). (nature.com)
  • Here, we used functional magnetic resonance imaging acquired at 9.4 T to map the brain areas activated by social interaction observation in awake marmosets. (elifesciences.org)
  • In this project we combined a clinically-relevant model of migraine with magnetic resonance imaging (MRI), to further identify brain areas involved in the generation of migraine and its symptoms. (europa.eu)
  • Functional magnetic resonance imaging of sensory and motor cortex: comparison with electrophysiological localization. (ox.ac.uk)
  • Functional magnetic resonance (MR) imaging was performed using a 1.5-tesla MR system to localize sensorimotor cortex. (ox.ac.uk)
  • A variety of imaging modalities, including structural and functional magnetic resonance imaging (MRI) and positron emission tomography (PET) studies of cerebral metabolism, have shown characteristic changes in the brain of patients with Alzheimer disease in prodromal and even presymptomatic states. (medscape.com)
  • Coronal, T1-weighted magnetic resonance imaging (MRI) scan in a patient with moderate Alzheimer disease. (medscape.com)
  • Axial, T2-weighted magnetic resonance imaging (MRI) scan reveals atrophic changes within bilateral temporal lobes with prominence of the sylvian fissures. (medscape.com)
  • Correlative Evaluation of Magnetic Resonance, Nuclear Medicine and Echocardiographic Imaging Modalities in Measurement of Cardiac Volumes and Functional Parameters. (upstate.edu)
  • This study is to correlate the results of Magnetic Resonance Imaging determination of cardiac chamber volumes and their associated functional parameters, (such as stroke volumes, ventricular filling and contraction rates) with those obtained by routinely utilized clinical Echocardiography and Nuclear Medicine techniques. (upstate.edu)
  • Magnetic Resonance Imaging has the ability to acquire cardiac functional data quickly and without any known safety hazard. (upstate.edu)
  • For the first time, we assessed 17 children with NS (9 females, mean age, 8.68±2.39) and 17 age- and sex-matched controls (9 female, mean age, 8.71±2.40) using diffusion brain imaging for white matter connectivity and structural magnetic resonance imaging to characterize brain morphology. (stanford.edu)
  • Participants actively moved the paretic/right arm under two conditions while undergoing functional magnetic resonance imaging. (medicaljournals.se)
  • Currently, low-level epidermal and insulin-like growth factors or uric acid in plasma/serum, low-level Aß in CSF, decreased cerebral cholinergic innervation or metabolism mainly in posterior regions of brain evaluated by positron emission tomography (PET), and atrophic hippocampus assessed by magnetic resonance imaging (MRI) are significant markers to indicate the risk of dementia in PD patients [ 8 ]. (biomedcentral.com)
  • His primary areas of investigation include Magnetic resonance imaging, Internal medicine, Pathology, Central nervous system disease and Endocrinology. (research.com)
  • His study in Magnetic resonance imaging is interdisciplinary in nature, drawing from both Blood flow, Frontal lobe, Nuclear medicine, Anatomy and Nuclear magnetic resonance. (research.com)
  • Andrew M. Blamire mostly deals with Internal medicine, Magnetic resonance imaging, Pathology, Cardiology and Neuroscience. (research.com)
  • His research integrates issues of Nuclear medicine, Anatomy, Perfusion, Nuclear magnetic resonance and Biomedical engineering in his study of Magnetic resonance imaging. (research.com)
  • His primary areas of study are Magnetic resonance imaging, Internal medicine, Neuroscience, White matter and Disease. (research.com)
  • The Magnetic resonance imaging study combines topics in areas such as Motor unit, Anatomy and Nuclear magnetic resonance. (research.com)
  • The scientist's investigation covers issues in Magnetic resonance imaging, White matter, Cognition, Internal medicine and Clinical trial. (research.com)
  • His research in Magnetic resonance imaging intersects with topics in Motor unit, Bipolar disorder, Neurology and Nuclear magnetic resonance. (research.com)
  • An international team of physicists and neuroscientists has reported a breakthrough in magnetic resonance imaging that allows brain scans more than seven times faster than currently possible. (scienceblog.com)
  • Magnetic resonance imaging works by using a magnetic field and radio waves to probe the environment of hydrogen atoms in water molecules in the body. (scienceblog.com)
  • The aim of this study was to compare diffusion-weighted magnetic resonance imaging (DWI) with computed tomography perfusion (CTP) for preoperative detection of metastases to lymph nodes (LNs) in head and neck squamous cell carcinoma (SCC). (hindawi.com)
  • Although ultrasound, routine contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI) allow the detection of enlarged cervical LNs, none of these methods can distinguish between benign and malignant causes of enlargement with any accuracy [ 7 ], as they use standard parameters (shape, size, internal architecture, extranodal invasion, and vascular features) that are nonspecific for malignancy [ 8 , 9 ]. (hindawi.com)
  • Functional magnetic resonance imaging was performed to compare neural responses to food versus non-food images. (biomedcentral.com)
  • PURPOSE: To prospectively determine the repeatability of functional magnetic resonance (MR) imaging brain activation tasks in a group of healthy older male volunteers. (ox.ac.uk)
  • Magnetic gradients are responsible for setting the spatial resolution in a magnetic resonance imaging (MRI) device. (itnonline.com)
  • A typical magnetic resonance imaging (MRI) system includes a cryogenic magnet (that creates a static magnetic field), a radiofrequency (RF) coil and resistive electromagnetic gradient coils. (itnonline.com)
  • Magnetic resonance angiography (MRA) is used to image arteries with good diagnostic accuracy and is less invasive than conventional angiography. (msdmanuals.com)
  • Venous imaging (magnetic resonance venography, or MRV) provides the best images of venous abnormalities, including thrombosis and anomalies. (msdmanuals.com)
  • Magnetic resonance cholangiopancreatography (MRCP) is particularly valuable as a noninvasive, highly accurate method of imaging the biliary and pancreatic duct systems. (msdmanuals.com)
  • Axial, T2-weighted magnetic resonance imaging (MRI) scan of the brain reveals atrophic changes in the temporal lobes. (medscape.com)
  • Magnetic resonance imaging (MRI) can be considered the preferred neuroimaging examination for Alzheimer disease because it allows for accurate measurement of the 3-dimensional (3D) volume of brain structures, especially the size of the hippocampus and related regions. (medscape.com)
  • Although contrast-enhanced computed tomography (CT) scanning and nonenhanced magnetic resonance imaging (MRI) can reveal a DVA, the preferred imaging technique is contrast-enhanced MRI because of its excellent depiction of the small venules and draining vein. (medscape.com)
  • Purpose To propose the technique multiband echo-shifted (MESH) echo planar imaging (EPI), which combines the principles of echo-shifted acquisition for two-dimensional multislice EPI, with both in-plane and multiband acceleration by means of partial parallel imaging techniques. (utwente.nl)
  • Results Results obtained at 1.5 T from healthy subjects revealed that the additional gradient switching did not additionally affect time course SNR over and above the reduction inherent to multiband imaging. (utwente.nl)
  • The MESH data were acquired at a factor 2 or 3 faster than corresponding multiband acquisitions for echo shift factors of 1 and 2, respectively. (utwente.nl)
  • Taking into consideration the limited number of studies used in previous studies in Internet addiction (IA), our aim was to investigate the functional correlates of IA in the default mode network (DMN) and in the inhibitory control network (ICN). (researchgate.net)
  • We aimed to examine the resting-state functional connectivity (rsFC) of the amygdala before and after group CBT. (biomedcentral.com)
  • Forty-seven newly diagnosed drug-naïve PD patients (28 PD-MCI patients and 19 PD patients with cognitively unimpaired (PD-CU)) and 28 healthy controls (HCs) underwent resting-state functional MRI. (biomedcentral.com)
  • The technique also lies at the heart of diffusion tensor imaging, a method for non-invasive study of connecting pathways within the brain's white matter. (wikipedia.org)
  • When acquiring diffusion data one typically acquires an image where each pixel has information about diffusion along one direction and for some range of diffusivities. (humanconnectome.org)
  • Diffusion tensor imaging (DTI) provides measurements to investigate the integrity of white matter architecture in vivo. (researchsquare.com)
  • Numerous studies are under way to identify specific imaging markers for different types of dementia, including cerebral volumetric measurements, diffusion imaging, spectroscopy, very-high-field MRI scans of senile plaques, and PET scan markers of senile plaques. (medscape.com)
  • Recently, other functional imaging techniques such as MRI diffusion-weighted imaging (DWI) and CT perfusion imaging (CTP) have shown promise in detecting metastatic cervical LNs, and there is increasing experience in head and neck SCC. (hindawi.com)
  • Examination of molecular diffusion using DWI performs with an EPI (echo planar imaging) sequence and a linear regression after a logarithmic transformation of the signal intensity was used to calculate the ADC values [ 14 ]. (hindawi.com)
  • The outstanding gradient performance (80 mT/m at 200 T/m/s simultaneous on all three axes) leads to exceptionally high-quality diffusion-weighted imaging (DWI) and excellent robustness overall. (osu.edu)
  • Multi-band technology further accelerates functional and diffusion image acquisition. (osu.edu)
  • Diffusion tensor imaging (DTI) tractography allows the visualization of multiple white matter tracts based on diffusion tensor imaging data, and capture better visualizations of brain connectivity. (osu.edu)
  • When we made the first images, it was unbelievable how fast we were going," said first author David Feinberg, a physicist and adjunct professor in UC Berkeley's Helen Wills Neuroscience Institute and president of the company Advanced MRI Technologies in Sebastopol, Calif. "It was like stepping out of a prop plane into a jet plane. (scienceblog.com)
  • Echo-planar images were acquired with and without use of a radio-frequency inversion pulse applied to inflowing arterial spins. (ox.ac.uk)
  • A qualitative map of CBF was then created by subtracting the image obtained without the radio-frequency pulse from that obtained with the radio-frequency pulse. (ox.ac.uk)
  • Both rely on image formation via the echo planar imaging (EPI) pulse sequence. (humanconnectome.org)
  • With EPI, a single pulse of radio waves is used to excite the hydrogen atoms, but the magnetic fields are rapidly reversed several times to elicit about 50 to 100 echoes before the atoms settle down. (scienceblog.com)
  • Recent work with noninvasive human brain imaging has started to investigate the effects of 3, 4-methylenedioxymethamphetamine (MDMA) on large-scale patterns of brain activity. (researchgate.net)
  • Functional MR imaging provides a useful noninvasive method of localization and functional assessment of sensorimotor cortex. (ox.ac.uk)
  • With advancements in imaging methods, several noninvasive imaging techniques have arisen, with the potential for identifying benign and metastatic LNs in head and neck SCC, thus avoiding the complications due to biopsy sampling [ 6 ]. (hindawi.com)
  • Qualitative mapping of cerebral blood flow and functional localization with echo-planar MR imaging and signal targeting with alternating radio frequency. (ox.ac.uk)
  • PURPOSE: To create qualitative maps of cerebral blood flow (CBF) with the EPISTAR (echo-planar imaging and signal targeting with alternating radio frequency) technique. (ox.ac.uk)
  • PET imaging revealed decreased regional cerebral blood flow (rCBF) in areas including the left amygdala, dorsal anterior cingulate, posterior cingulate, medial temporal lobe (MTL), and bilateral insula (Gamma et al, 2000). (researchgate.net)
  • Second-tier imaging with molecular methods, preferably with fluorodeoxyglucose positron emission tomography (FDG-PET) (or single-photon emission CT [SPECT] if PET is unavailable), can provide greater diagnostic specificity. (medscape.com)
  • Single photon emission computed tomography (SPECT) and positron-emission tomography (PET) are imaging techniques that supply functional information, but they involve radiation exposure and are expensive with low availability and are hampered by relatively low spatial resolution [ 10 - 13 ]. (hindawi.com)
  • This study aims to show that cardiac MRI in the clinical setting is equally accurate as other non-invasive imaging modalities for left ventricular function and a first line technique for right ventricular functional assessment in this institution. (upstate.edu)
  • The multi-band technology accelerates image acquisition in all contrast modalities, significantly enhancing the quality of data acquisition in neuroimaging studies. (osu.edu)
  • Evidence obtained with low-resolution and low-field functional imaging techniques (PET, 1.5T MRI scanner) also supports the possibility that the cerebellum contributes to the control of emotions, but in these studies, precise localization at the cerebellar sub-regional level remains to be established [ 16 , 18 - 20 ] (Table 1 ). (springer.com)
  • A recent meta-analysis of imaging studies in nondisabled adults (16) identified several motor planning and movement execution regions on both sides of the brain that were consistently active during imagery including premotor, prefrontal, and parietal cortices, basal ganglia, thalamus, and cerebellum. (medicaljournals.se)
  • Axial proton density-weighted image shows an area of marked signal intensity loss in the right cerebellum adjacent to the developmental venous anomaly (DVA). (medscape.com)
  • In patients who underwent electrocortical stimulation (ECS) mapping of speech function during craniotomy while awake, the sites with speech function were compared with the locations of activation found during fMR imaging of word generation. (ajnr.org)
  • Animals underwent MRI scan at days 0, 6 and 18 of sumatriptan (or saline for controls) exposure, to investigate which and how brain regions show structural and/or functional changes associated with the development of, and recovery from, allodynia. (europa.eu)
  • Each subject underwent MR imaging three times in weekly intervals. (ox.ac.uk)
  • Structural imaging, preferably with MRI when possible and with computed tomography (CT) when not, should be performed as a first-tier approach. (medscape.com)
  • [ 1 ] Nonenhanced computed tomography (CT) scanning and MRI are the appropriate imaging methods. (medscape.com)
  • In reasoning about emotion expressions and their functional and brain basis, we tend to use abstract categories and to lump together different signals presumably referring to their shared meaning. (frontiersin.org)
  • Those that absorb radio energy and then release the energy are detected by magnetic coils surrounding the head, and these signals, or "echoes," are used to produce an image of the brain. (scienceblog.com)
  • Computer algorithms analyze these signals and produce detailed anatomic images. (msdmanuals.com)
  • Our findings are consistent with the notion that under ecological conditions emotion expressions of the face, body and voice may have different functional roles in triggering rapid adaptive behavior, even if when viewed from an abstract conceptual vantage point, they may all exemplify the same emotion. (frontiersin.org)
  • To date, only rsfMRI has been able to image intrinsic brain networks with the appropriate spatial resolution and coverage. (nature.com)
  • Unfortunately, these EPI images often suffer from low spatial resolution and distortion artifacts. (bruker-webdev.de)
  • Finally, magnetic nanoparticles require high slew rates in order to achieve high spatial resolution (for imaging) and high gradient field strengths (for therapy). (itnonline.com)
  • A final PET quantitative stability assessment for simultaneous PET scanning during functional MRI studies was performed with a spiral in-and-out gradient echo sequence. (snmjournals.org)
  • Sequence parameters: spin-echo (SE) and gradient-echo (GE) single-shot EPI with field-of-view 16.8-25.6 mm, matrix 64 (7.0 Tesla) to 256 (11.7 Tesla, four-element coil), resolution 75-400 µm, up to 16 adjacent slices of 0.5 -2 mm thickness, echo time 16 ms (GE) and 30 ms (SE), repetition time = 3000 ms, 115 repetitions. (bruker-webdev.de)
  • and UK, for coils used in imaging. (wikipedia.org)
  • Recent technologies in MRI such as high magnetic field strengths, fast RF-readout electronics and multi-element array coils now enable high resolution functional MRI to detect and differentiate small activation volumes at the scale of even sub-structures. (bruker-webdev.de)
  • We aimed to compare the resting-state structural and functional connectivity (FC) of olfactory neural pathways in patients with nIHH and KS. (researchsquare.com)
  • Structural and functional connectivity data analyses were then performed. (researchsquare.com)
  • We have reported significant structural and functional disruptions unilaterally at the right junction of the fronto-limbic system in KS patients. (researchsquare.com)
  • There is abundant evidence of structural and functional brain alterations during the acute stage of anorexia nervosa (AN), although affected brain areas differ based on various study methodologies. (biomedcentral.com)
  • We applied functional MR imaging with a learning task in healthy elderly volunteers and in patients with Alzheimer's disease to study brain activation during memory performance. (ajnr.org)
  • The purpose was to determine the feasibility of functional MR imaging during a learning task in healthy elderly volunteers and in patients with Alzheimer's disease and to test our hypothesis that brain activation is decreased in the medial temporal lobe (MTL) memory system in patients with Alzheimer's disease compared with control volunteers. (ajnr.org)
  • With functional MR imaging, encoding of complex color pictures or visual associations of line drawings was shown to lead to activation in caudal portions of the parahippocampal gyrus and hippocampal formation (15-17) . (ajnr.org)
  • Activation seen on functional MR imaging was coextensive with the location of the sensorimotor area determined by evoked potentials and electrical stimulation. (ox.ac.uk)
  • Eight echoes are collected from 30 ms to 205 ms with an echo spacing of 25 ms. All echoes show significant activation, but each echo reveals its own pattern of activation. (mcmaster.ca)
  • GRAPPA 2 can be confidently used for high-resolution whole-brain imaging to improve BOLD sensitivity with very low probability for false-positive activation due to slice leakage. (umn.edu)
  • As such functional activation studies need to be performed on anesthetized animals, α-chloralose was chosen for its ability to hold the animal still whilst allowing stimulus to be processed at the same time. (bruker-webdev.de)
  • Volumetric measurements and visual assessment of MTL atrophy by use of MR imaging are sensitive markers of Alzheimer's disease, even for mild forms of the disease (3-8) . (ajnr.org)
  • Repeatability of motor and working-memory tasks in healthy older volunteers: assessment at functional MR imaging. (ox.ac.uk)
  • The Brodmann areas activated during performance of word-generation tasks were tabulated in 34 consecutive patients referred for fMR imaging mapping of language areas. (ajnr.org)
  • fMR imaging with word-generation tasks produces technically satisfactory maps of Broca's area, which localize the area accurately and reliably. (ajnr.org)
  • T with 10 healthy volunteers imaged while performing simultaneous visual and motor tasks. (umn.edu)
  • A repeatability index was calculated to compare test-retest repeatability between subjects and between functional MR imaging tasks. (ox.ac.uk)
  • The purpose of this study was to determine the reliability, test-retest precision, and accuracy of the standard word-generation paradigms for fMR imaging. (ajnr.org)
  • As these networks share anatomical and functional characteristics, it suggests that the social interaction network may play a key role in these two human networks and be a conserved feature across primates ( Sliwa and Freiwald, 2017 ). (elifesciences.org)
  • In July 2017 an Ultra high field magnet (11.7 Tesla), was installed by the NeuroSpin institute, a research center dedicated to human brain imaging at the Commission for Atomic Energy and Alternative Energies (CEA) Paris-Saclay (France). (emric.fr)
  • A fast recovery fast spin echo MR sequence was selected for high RF power, and an echo planar imaging sequence was selected for its high heat-inducing gradients. (snmjournals.org)
  • The system could potentially visualize short-lived free-radicals formed during radiation therapy, using electron spin resonance imaging. (itnonline.com)
  • A final test demonstrated quantitative stability during a spiral functional MRI sequence. (snmjournals.org)
  • Therefore, the BOLD effect is mostly recorded with the EPI (Echo Planar Imaging) sequence, a fast sequence able to record several image slices of the rat brain repetitively in 3 seconds or less. (bruker-webdev.de)
  • Axial T2 image shows that the DVA can be subtle. (medscape.com)
  • Functional MR imaging offers the possibility to study individual participants noninvasively using the blood oxygen level-dependent technique (14) . (ajnr.org)
  • Our MRI scanner provides accurate functional images of the human brain due to increased blood-oxygen level dependent (BOLD) contrast in our setting, favoring high functional contrast-to-noise ratio and faster scans. (osu.edu)
  • Practice parameters for diagnosis and evaluation of dementia, as published by the American Academy of Neurology (AAN), consider structural brain imaging to be optimal. (medscape.com)
  • Application of MR molecular imaging in the evaluation of the heart and breast. (upstate.edu)
  • Clinical evaluation of radiolabelled monoclonal antibody imaging. (upstate.edu)
  • MRI Evaluation of Maximal Temporal and Spatial Mensurability of Cardiac Chambers and Thoracic Great Vessels: A Comparison of Conventional and Echo-planar Techniques. (upstate.edu)
  • The ability to obtain accurate cyclic functional information of the cardiac chambers plays a continuing important clinical diagnostic role in the evaluation and monitoring of patients with a wide range of cardiac pathologies as well as patients with lung disease and patients embarking on and continuing with cardiotoxic chemotherapeutic regimes. (upstate.edu)
  • Specifically, functional parameters such as ejection fraction and wall motion characteristics, are an integral part of day to day cardiologic evaluation. (upstate.edu)
  • The practice parameters for the diagnosis and evaluation of dementia, as published by the American Academy of Neurology (AAN), consider structural brain imaging optimal. (medscape.com)
  • The measured functional signal decrease in MTL areas warrants further exploration of the (early) diagnostic usefulness of functional MR imaging in cases of Alzheimer's disease and other dementias. (ajnr.org)
  • Diagnostic and interventional imaging. (lu.se)
  • Functional MR imaging with a learning task seems feasible in elderly volunteers and in patients with Alzheimer's disease. (ajnr.org)
  • First, we wanted to know whether functional MR imaging with a learning task was feasible in elderly healthy volunteers and in patients with Alzheimer's disease. (ajnr.org)
  • In dynamic imaging, both PET and MR acquisition generally begin at the same time. (snmjournals.org)
  • By multiplexing the image acquisition for higher speed, a higher frame rate is achieved for more information in a shorter period of time. (scienceblog.com)
  • The simultaneous nature of hybrid PET/MR offers unique advantages for a variety of imaging studies ( 1 ). (snmjournals.org)
  • However, only a few studies have focused on early functional alteration in T2DM prior to mild cognitive impairment (MCI). (frontiersin.org)
  • Currently, my work is focused in The BrIDGe Lab, on structural, functional, and DTI imaging studies of children and adolescents with RASopathies. (stanford.edu)
  • Functional MRI studies showed that during cognitive inhibition of response various brain structures are active. (europeanproceedings.com)
  • Here we propose a novel, highly resolved connectivity mapping approach, using ultrafast functional ultrasound (fUS), which enables imaging of cerebral microvascular haemodynamics deep in the anaesthetized rodent brain, through a large thinned-skull cranial window, with pixel dimensions of 100 μm × 100 μm in-plane. (nature.com)
  • Because the technique works on all modern MRI scanners, the impact of the ultrafast imaging technique will be immediate and widespread at research institutions worldwide, Feinberg said. (scienceblog.com)
  • In a previous study, neurovascular decoupling pattern in T2DM without MCI was assessed using a variety of imaging methods ( 5 ). (frontiersin.org)
  • Therefore, the validation of complementary or alternative methods for in vivo imaging of intrinsic FC is an important scientific objective. (nature.com)
  • Functional results were qualitatively similar between methods. (utwente.nl)
  • 2019. Comparison of MRI-based automated segmentation methods and functional neurosurgery targeting with direct visualization of the Ventro-intermediate thalamic nucleus at 7T . (cardiff.ac.uk)
  • We show that the EPI time course in functional MR imaging at 4 Tesla displays a multiphasic response in response to photic stimulation. (umn.edu)
  • High-field 3 Tesla magnets provide the optimal quality and susceptibility balance for human imaging. (osu.edu)
  • Functional MRI in small animals is achievable in magnets from 4.7 to 11.7 Tesla[2,3]. (bruker-webdev.de)
  • The faster scans are made possible by combining two technical improvements invented in the past decade that separately boosted scanning speeds two to four times over what was already the fastest MRI technique, echo planar imaging (EPI). (scienceblog.com)
  • 3D datasets with cubic voxels, datasets with very thin slices through a combination of multiple interleaved 3D slabs, and also to perform flow compensation and magnetization transfer imaging. (osu.edu)
  • MRI uses magnetic fields and radio waves to produce images of thin slices of tissues (tomographic images). (msdmanuals.com)
  • found that functional connectivity (FC) between the hippocampus and certain brain structures had decreased significantly in T2DM subjects without MCI ( 12 ). (frontiersin.org)
  • The results may indicate that a specific structural-functional asymmetry exists in the olfactory cortex pathways in KS patients. (researchsquare.com)
  • CONCLUSION: The generally poor quantitative task repeatability highlights the need for further methodologic developments before much reliance can be placed on functional MR imaging results of single-session experiments. (ox.ac.uk)
  • Brain image reveals hippocampal atrophy, especially on the right side. (medscape.com)
  • Functional MR imaging may thus provide potential for studying functional alterations that occur early in Alzheimer's disease. (ajnr.org)
  • The brain dynamically integrates and coordinates responses to internal and external stimuli across multiple spatiotemporal scales through large-scale functional networks. (nature.com)
  • See the images of venous vascular malformations below). (medscape.com)
  • These results introduce fUS as a powerful novel neuroimaging method, which could be extended to portable systems for three-dimensional functional connectivity imaging in awake and freely moving rodents. (nature.com)
  • 0.1 Hz) spontaneous fUS signal fluctuations reproducibly report, at different coronal planes, overlapping high-contrast, intrinsic functional connectivity patterns. (nature.com)
  • We retrospectively reviewed 34 patients with cerebral lesions who were referred for fMR imaging language mapping between January 1999 and July 2000. (ajnr.org)
  • for accuracy, we compared the results of functional imaging with those of intraoperative mapping. (ajnr.org)
  • Gamma et al suggest that these results might represent dysregulation of a functional network that others have since linked to the anxiety phenome (Paulus and Stein, 2006). (researchgate.net)
  • RESULTS: Nine of the 16 subjects generated useful data at all three MR imaging-functional task sessions. (ox.ac.uk)
  • These results provide new insights into the understanding of (i) the BOLD effect, (ii) different aspects, such as animal models, anesthesia protocols, stimulation and imaging parameters as well as analysis techniques, (iii) the (changing) structure of the brain, (iv) reorganization and recovery of the brain after diseases like stroke and Alzheimer's disease. (bruker-webdev.de)
  • Functional MR (fMR) imaging is used to map eloquent brain regions before craniotomy because it depicts these regions more reliably and accurately than do anatomic landmarks visualized on MR images (1, 2) . (ajnr.org)
  • Functional MR (fMR) imaging of word generation has been used to map Broca's area in some patients selected for craniotomy. (ajnr.org)
  • For example, MRI can provide accurate images of hip fractures in patients with osteopenia. (msdmanuals.com)
  • Patients with a decrease in outflow are influenced by mechanical or functional causes. (medscape.com)
  • In the 1980s, he worked with distinguished scientists including 2003 Nobel Prize winner Sir Peter Mansfield to produce a mathematical framework for MRI coil design which was crucial to the development of ultra-fast echoplanar imaging (EPI). (wikipedia.org)
  • The ultra-fast image reconstruction and real-time rendering packages run on the operator's console. (osu.edu)
  • Currently, he is working on applications for ultra-fast MRI for high-resolution dental and prostate care, and (with academic investigators) on image-guided therapy with magnetic nanoparticles. (itnonline.com)
  • Early detection of the brain functional changes of this stage could be clinically significant, because it might provide theoretical evidence for explaining cognitive changes related to T2DM and might greatly postpone the onset of MCI. (frontiersin.org)
  • Coronal T1-weighted contrast-enhanced image obtained in a patient who had undergone surgery in the past for an arteriovenous malformation (AVM) shows bilateral developmental venous anomalies (DVAs) and the classic caput medusa appearance. (medscape.com)