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Result : Searchterm 'brain' found in 3 terms [] and 54 definitions []
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Brain MRIForum -
related threadsMRI Resource Directory:
 - Brain MRI -
 
Brain imaging, magnetic resonance imaging of the head or skull, cranial magnetic resonance tomography (MRT), neurological MRI - they describe all the same radiological imaging technique for medical diagnostic.
Magnetic resonance imaging of the human brain includes the anatomic description and the detection of lesions. Special techniques like diffusion weighted imaging, functional magnetic resonance imaging (fMRI) and spectroscopy provide also information about the function and chemical metabolites of the brain. MRI provides detailed pictures of brain and nerve tissues in multiple planes without obstruction by overlying bones. Brain MRI is the procedure of choice for most brain disorders. It provides clear images of the brainstem and posterior brain, which are difficult to view on a CT scan. It is also useful for the diagnosis of demyelinating disorders (disorders such as multiple sclerosis (MS) that cause destruction of the myelin sheath of the nerve).
With this noninvasive procedure also the evaluation of blood flow and the flow of cerebrospinal fluid (CSF) is possible. Different MRA methods, also without contrast agents can show a venous or arterial angiogram. MRI can distinguish tumors, inflammatory lesions, and other pathologies from the normal brain anatomy. However, MRI scans are also used instead other methods to avoid the dangers of interventional procedures like angiography (DSA - digital subtraction angiography) as well as of repeated exposure to radiation as required for computed tomography (CT) and other X-ray examinations.
A (birdcage) bird cage coil achieves uniform excitation and reception and is commonly used to study the brain. Usually a brain MRI procedure includes FLAIR, T2 weighted and T1 weighted sequences in two or three planes.

See also Fetal MRI, Fluid Attenuation Inversion Recovery (FLAIR), Perfusion Imaging and High Field MRI.
See also Arterial Spin Labeling.
 
Images, Movies, Sliders:
 Brain MRI Images Axial T2  Open this link in a new window
      

 MRI of the Skull Base  Open this link in a new window
    
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 Anatomic Imaging of the Orbita  Open this link in a new window
      

 Brain MRI Images T1  Open this link in a new window
 MRI of the Brain Stem with Temoral Bone and Auditory System  Open this link in a new window
    
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 TOF-MRA Circle of Willis Inverted MIP  Open this link in a new window
    

 PCA-MRA 3D Brain Venography Colored MIP  Open this link in a new window
    

 
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    • Nerve Conductivity
    • Functional Magnetic Resonance Imaging
    • Spectroscopy
    • Arterial Spin Labeling
    • Blood Brain Barrier
 
Further Reading:
  Basics:
New MRI technique offers faster diagnosis of multiple sclerosis
Monday, 1 February 2016   by medicalxpress.com    
Ultra-high-field MRI reveals language centres in the brain in much more detail
Tuesday, 28 October 2014   by medicalxpress.com    
A Dutch study has revealed that as many as 13% of healthy adults may have some type of undiagnosed abnormality in the brain.
Sunday, 4 November 2007   by www.news-medical.net:80    
  News & More:
MRI Reveals Significant Brain Abnormalities Post-COVID
Monday, 21 November 2022   by neurosciencenews.com    
Combining genetics and brain MRI can aid in predicting chances of Alzheimer's disease
Wednesday, 29 June 2022   by www.sciencedaily.com    
Roundup: How Even Mild COVID Can Affect the Brain; This Many Daily Steps Improves Longevity; and More
Friday, 11 March 2022   by baptisthealth.net    
A low-cost and shielding-free ultra-low-field brain MRI scanner
Tuesday, 14 December 2021   by www.nature.com    
Large International Study Reveals Spectrum of COVID-19 Brain Complications
Tuesday, 9 November 2021   by www.itnonline.com    
Brain MRI-Based Subtypes of MS Predict Disability Progression, Treatment Response
Thursday, 13 May 2021   by www.neurologyadvisor.com    
New MRI method improves detection of disease changes in the brain's network
Thursday, 11 June 2020   by www.compute.dtu.dk    
New NeuroCOVID Classification System Uses MRI to Categorize Patients
Friday, 12 June 2020   by www.diagnosticimaging.com    
New MRI technique can 'see' molecular changes in the brain
Thursday, 5 September 2019   by medicalxpress.com    
Talking therapy or medication for depression: Brain scan may help suggest better treatment
Monday, 27 March 2017   by www.newsnation.in    
MRI identifies brain abnormalities in chronic fatigue syndrome patients
Wednesday, 29 October 2014   by www.eurekalert.org    
MRIs Useful in Tracking Depression in MS Patients
Tuesday, 1 July 2014   by www.hcplive.com    
Contrast agent linked with brain abnormalities on MRI
Tuesday, 17 December 2013   by www.sciencecodex.com    
MRIs Reveal Signs of Brain Injuries Not Seen in CT Scans
Tuesday, 18 December 2012   by www.sciencedaily.com    
Iron Deposits in the Brain May Be Early Indicator of MS
Wednesday, 13 November 2013   by www.healthline.com    
Migraine Sufferers Have Thicker Brain Cortex
Tuesday, 20 November 2007   by www.medicalnewstoday.com    
MRI Resources 
Pregnancy - Pediatric and Fetal MRI - - Stimulator pool - Cochlear Implant - Examinations
 
Blood Brain BarrierInfoSheet: - Contrast Agents - 
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The brain tissue is provided with a tight endothelial layer on vessels that acts as a filter for substances that reach the brain through the blood stream. This filter is called the blood brain barrier.
The blood brain barrier is responsible for the absence of contrast agent enhancement in normal brain tissue after administration of the iodinated or paramagnetic contrast media used in brain MRI and computed tomography (CT) diagnostic. The absence of contrast uptake in normal tissue provides the basis for differentiation from pathological brain tissue, which is conversely characterized by a disruption of the blood brain barrier.

See also Contrast Enhanced MRI, MRI Safety, Adverse Reaction.
 
Images, Movies, Sliders:
 MRI Orbita T1  Open this link in a new window
 MRI Orbita T1 with Contrast  Open this link in a new window
 
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• View the DATABASE results for 'Blood Brain Barrier' (7).Open this link in a new window

 
Further Reading:
  News & More:
Hyperosmolar blood-brain barrier opening using intra-arterial injection of hyperosmotic mannitol in mice under real-time MRI guidance
Monday, 13 December 2021   by www.nature.com    
Nanorobotic agents open the blood-brain barrier, offering hope for new brain treatments
Wednesday, 25 March 2015   by www.nanowerk.com    
Magnetic resonance-guided motorized transcranial ultrasound system for blood-brain barrier permeabilization along arbitrary trajectories in rodents
Thursday, 24 December 2015   by www.ncbi.nlm.nih.gov    
MRI Resources 
Open Directory Project - Safety pool - Pathology - MRI Centers - Anatomy - RIS
 
Functional Brain MR SpectroscopyMRI Resource Directory:
 - Functional MRI -
 
The use of MR spectroscopy for acquiring functional activation of the brain.
There are two possible approaches:
In the first, localized spectra of brain water are acquired and subtle changes in these spectra reflect the biophysical water environment. Changes in T2 due to deoxyhaemoglobin concentration may be detected in this way. The disadvantages of poor spatial resolution are to some extent offset by the high signal to noise ratio SNR of the spectroscopic data.
An alternative approach is to use MR spectroscopy directly to detect metabolites that are altered by brain activation. These include lactate and glucose. Such experiments have inherently poor spatial and temporal resolution, but do give a direct indication of the metabolic response of the brain to functional activation.
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Searchterm 'brain' was also found in the following services: 
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News  (635)  Resources  (49)  Forum  (39)  
 
Functional Magnetic Resonance ImagingMRI Resource Directory:
 - Functional MRI -
 
(fMRI) Functional magnetic resonance imaging is a technique used to determine the dynamic brain function, often based on echo planar imaging, but can also be performed by using contrast agents and observing their first pass effects through brain tissue. Functional magnetic resonance imaging allows insights in a dysfunctional brain as well as into the basic workings of the brain.
The in functional brain MRI most frequently used effect to assess brain function is the blood oxygenation level dependent contrast (BOLD) effect, in which differential changes in brain perfusion and their resultant effect on the regional distribution of oxy- to deoxyhaemoglobin are observable because of the different 'intrinsic contrast media' effects of the two haemoglobin forms. Increased brain activity causes an increased demand for oxygen, and the vascular system actually overcompensates for this, increasing the amount of oxygenated haemoglobin. Because deoxygenated haemoglobin attenuates the MR signal, the vascular response leads to a signal increase that is related to the neural activity.
Functional imaging relates body function or thought to specific locations where the neural activity is taking place. The brain is scanned at low resolution but at a fast rate (typically once every 2-3 seconds). Structural MRI together with fMRI provides an anatomical baseline and best spatial resolution.
Interactions can also be seen from the motor cortex to the cerebellum or basal ganglia in the case of a movement disorder such as ataxia. For example: by a finger movement the briefly increase in the blood circulation of the appropriate part of the brain controlling that movement, can be measured.
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• View the DATABASE results for 'Functional Magnetic Resonance Imaging' (8).Open this link in a new window


• View the NEWS results for 'Functional Magnetic Resonance Imaging' (15).Open this link in a new window.
 
Further Reading:
  Basics:
IMAGE CONTRAST IN MRI(.pdf)
   by www.assaftal.com    
  News & More:
New AI application reads eye movements
Tuesday, 16 November 2021   by www.news-medical.net    
Functional MRI Can Provide Clearer Picture of Unresponsive COVID-19 Patient's Brain Function and Potential for Recovery
Tuesday, 26 January 2021   by www.hospimedica.com    
Scientists first studied the brain of birds while moving
Sunday, 20 September 2020   by freenews.live    
MRI Technique Used to Identify Future Risk of Binge Drinking
Monday, 6 January 2020   by www.diagnosticimaging.com    
Functional MRI may help identify new, effective painkillers for chronic pain sufferers
Thursday, 4 February 2016   by www.eurekalert.org    
Study shows functional MRI differences in working memory in people with primary insomnia
Saturday, 31 August 2013   by www.news-medical.net    
Functional magnetic resonance imaging may improve diagnosis of autism
Tuesday, 31 May 2011   by www.dnaindia.com    
Using fMRI to study brain development
Friday, 30 November 2007   by www.eurekalert.org    
MRI Resources 
Pacemaker - Portals - Corporations - Quality Advice - Software - Pregnancy
 
Special ImagingInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
Special imaging primarily means advanced MRI techniques used for qualitative and quantitative measurement of biological metabolism as e.g., spectroscopy, perfusion imaging (PWI, ASL), diffusion weighted imaging (DWI, DTI, DTT) and brain function (BOLD, fMRI). This physiological magnetic resonance techniques offer insights into brain structure, function, and metabolism.
Spectroscopy provides functional information related to identification and quantification of e.g. brain metabolites. MR perfusion imaging has applications in stroke, trauma, and brain neoplasm. MRI provides the high spatial and temporal resolution needed to measure blood flow to the brain. arterial spin labeling techniques utilize the intrinsic protons of blood and brain tissue, labeled by special preparation pulses, rather than exogenous tracers injected into the blood.
MR diffusion tensor imaging characterizes the ability of water to spread across the brain in different directions. Diffusion parallel to nerve fibers has been shown to be greater than diffusion in the perpendicular direction. This provides a tool to study in vivo fiber connectivity in brain MRI.
FMRI allows the detection of a functional activation in the brain because cortical activity is intimately related to local metabolism changes.

See also Diffusion Tensor Tractography.
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• View the NEWS results for 'Special Imaging' (14).Open this link in a new window.
 
Further Reading:
  Basics:
MRI's inside story
Thursday, 4 December 2003   by www.economist.com    
Diffusion Imaging: From Basic Physics to Practical Imaging
1999   by ej.rsna.org    
  News & More:
Philips and University Medical Center Utrecht Partner to Advance Quantitative MRI With MR-STAT
Monday, 10 August 2020   by www.itnonline.com    
This new 'whole body' MRI is better for cancer patients
Tuesday, 28 January 2014   by www.physiciansnews.com    
Turbo-FLASH Based Arterial Spin Labeled Perfusion MRI at 7 T
Thursday, 20 June 2013   by www.plosone.org    
Multiparametric MRI for Detecting Prostate Cancer
Wednesday, 17 December 2014   by www.onclive.com    
MRI Resources 
Resources - Intraoperative MRI - Quality Advice - MRI Technician and Technologist Career - Spectroscopy pool - Musculoskeletal and Joint MRI
 
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