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Result : Searchterm 'Magnetic Resonance Imaging' found in 5 terms [] and 64 definitions []
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Searchterm 'Magnetic Resonance Imaging' was also found in the following services: 
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News  (964)  Resources  (126)  Forum  (2)  
 
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
    
SlidersSliders Overview

 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
    
SlidersSliders Overview

 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
    

 
Medical-Ultrasound-Imaging.comA-Mode
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• Related Searches:
    • Diffusion Tensor Imaging
    • Nerve Conductivity
    • Spectroscopy
    • Arterial Spin Labeling
    • Blood Flow Imaging
 
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 
Directories - MRI Training Courses - Safety Training - MRI Accidents - MRCP - Quality Advice
 
AMAG Pharmaceuticals, Inc.MRI Resource Directory:
 - Developers -
 
www.amagpharma.com The company changed its name from Advanced Magnetics, Inc. to AMAG Pharmaceuticals, Inc. in July 2007.
AMAG Pharmaceuticals, Inc., a biopharmaceutical company, developed and manufactured organ-specific diagnostic contrast agents that provide clearer images during magnetic resonance imaging (MRI) tests used to detect tumors and other abnormalities.
The company had two MRI related products on the market: Feridex I.V. (for the diagnosis of liver lesions) and GastroMARK (used for bowel and abdominal MR imaging). In November 2008, AMAG Pharmaceuticals, Inc. decided to discontinue the manufacturing of Feridex. The development of Combidex as a contrast agent for lymph disease has also been stopped.
The Company has now two commercial products: Feraheme® and GastroMARK®. Feraheme® is the trade name of Ferumoxytol (formerly Code 7228) and is indicated for the treatment of iron deficiency anemia. Feraheme® is also being developed as a diagnostic agent for vascular-enhanced magnetic resonance imaging (MRI) to assess peripheral arterial disease.

MRI Contrast Agents:
Contact Information
MAIL
AMAG Pharmaceuticals, Inc.
61 Mooney St.
Cambridge, MA 02138
USA
PHONE
+1-617-497-2070
FAX
+1-617-547-2445
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• View the DATABASE results for 'AMAG Pharmaceuticals, Inc.' (10).Open this link in a new window


• View the NEWS results for 'AMAG Pharmaceuticals, Inc.' (7).Open this link in a new window.
 
Further Reading:
  Basics:
Advanced Magnetics, Inc. Announces Name Change to AMAG Pharmaceuticals, Inc.
Tuesday, 24 July 2007   by salesandmarketingnetwork.com    
Ferumoxytol
   by www.amagpharma.com    
AMAG Pharmaceuticals Inc. Q4 2008 Earnings Call Transcript
Friday, 27 February 2009   by seekingalpha.com    
  News & More:
The demise of Combidex - Sinerem
Wednesday, 24 March 2010   by www.wellsphere.com    
MRI Resources 
Safety Training - Safety pool - Distributors - Online Books - Functional MRI - Libraries
 
ArtifactForum -
related threadsInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
An image artifact is a structure not normally present but visible as a result of a limitation or malfunction in the hardware or software of the MRI device, or in other cases a consequence of environmental influences as heat or humidity or it can be caused by the human body (blood flow, implants etc.). The knowledge of MRI artifacts (brit. artefacts) and noise producing factors is important for continuing maintenance of high image quality. Artifacts may be very noticeable or just a few pixels out of balance but can give confusing artifactual appearances with pathology that may be misdiagnosed.
Changes in patient position, different pulse sequences, metallic artifacts, or other imaging variables can cause image distortions, which can be reduced by the operator; artifacts due to the MR system may require a service engineer.
Many types of artifacts may occur in magnetic resonance imaging. Artifacts in magnetic resonance imaging are typically classified as to their basic principles, e.g.:
Physiologic (motion, flow)
Hardware (electromagnetic spikes, ringing)
Inherent physics (chemical shift, susceptibility, metal)

Several techniques are developed to reduce these artifacts (e.g. respiratory compensation, cardiac gating, eddy current compensation) but sometimes these effects can also be exploited, e.g. for flow measurements.

See also the related poll result: 'Most outages of your scanning system are caused by failure of'
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• View the DATABASE results for 'Artifact' (166).Open this link in a new window

 
Further Reading:
  Basics:
ARTEFACT VERSUS ARTIFACT
Saturday, 26 January 2002   by www.worldwidewords.org    
  News & More:
MRI results affected by movement? MIT researchers have an AI-powered solution
Friday, 25 August 2023   by healthimaging.com    
Magnetic eyelashes: A new source of MRI artifacts
Wednesday, 24 July 2019   by medicalxpress.com    
On the Horizon - Next Generation MRI
Wednesday, 23 October 2013   by thefutureofthings.com    
Searchterm 'Magnetic Resonance Imaging' was also found in the following services: 
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News  (964)  Resources  (126)  Forum  (2)  
 
Breast MRIMRI Resource Directory:
 - Breast MRI -
 
(MR mammography) Magnetic resonance imaging of the breast is particularly useful in evaluation of newly diagnosed breast cancer, in women whose breast tissue is mammographically very dense and for screening in women with a high lifetime risk of breast cancer because of their family history or genetic disposition.
Breast MRI can be performed on all standard whole body magnets at a field strength of 0.5 T - 1.5 Tesla. Powerful gradient strengths over 15 mT/m will help to improve the balance between spatial resolution, scanning speed, and volume coverage. The use of a dedicated bilateral breast coil is obligatory.
Malignant lesions release angiogenic factors that increase local vessel density and vessel permeability. Breast cancer is detectable due to the strong enhancement in dynamic breast imaging that peaks early (about 1-2 min.) after contrast medium injection. If breast cancer is suspected, a breast biopsy may be necessary to secure the diagnosis.

See also Magnetic Resonance Imaging MRI, Biopsy and MR Guided Interventions.

Requirements in breast MRI procedures:
Both breasts must be measured without gaps.
Temporal resolution should be sufficient to allow early imaging after contrast agent with dynamic imaging every 60-120 sec.
For the best possible detection of enhancement fat signal should be eliminated either by image subtraction or by spectrally selective fat saturation.
Thin slices are necessary to assure absence of partial volume effects.
Imaging should be performed with a spatial resolution in plane less than 1 mm.

For Ultrasound Imaging (USI) see Breast Ultrasound at Medical-Ultrasound-Imaging.com.

See also the related poll result: 'MRI will have replaced 50% of x-ray exams by'
 
Images, Movies, Sliders:
 Breast MRI Images T2 And T1  Open this link in a new window
      
 Breast MRI Images T2 And T1 Pre - Post Contrast  Open this link in a new window
 Breast MRI Images T1 Pre - Post Contrast  Open this link in a new window
      
 
Radiology-tip.comradMammography,  Breast Imaging
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Medical-Ultrasound-Imaging.comBreast Ultrasound
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• View the DATABASE results for 'Breast MRI' (13).Open this link in a new window


• View the NEWS results for 'Breast MRI' (41).Open this link in a new window.
 
Further Reading:
  Basics:
New Screening Guidelines for Women at High Risk for Breast Cancer
Wednesday, 26 September 2007   by www.newswise.com    
CONTRAST-ENHANCED MRI OF THE BREAST(.pdf)
MRI Improves Breast Cancer Screening in Older BRCA Carriers
Monday, 5 January 2015   by www.cancernetwork.com    
  News & More:
Technology advances in breast cancer screenings lead to early diagnosis
Friday, 6 October 2023   by ksltv.com    
Are synthetic contrast-enhanced breast MRI images as good as the real thing?
Friday, 18 November 2022   by healthimaging.com    
Abbreviated breast MRI protocols not as cost-effective as promised, new study shows
Wednesday, 20 July 2022   by healthimaging.com    
Deep learning poised to improve breast cancer imaging
Thursday, 24 February 2022   by www.eurekalert.org    
Pre-Operative Breast MRI Can Help Identify Patients Likely to Experience Nipple-Sparing Mastectomy Risks
Wednesday, 7 April 2021   by www.diagnosticimaging.com    
Breast cancer screening recalls: simple MRI measurement could avoid 30% of biopsies
Monday, 1 March 2021   by www.eurekalert.org    
A Comparison of Methods for High-Spatial-Resolution Diffusion-weighted Imaging in Breast MRI
Tuesday, 25 August 2020   by pubs.rsna.org    
Pre-Operative Breast MRI Diagnoses More Cancers in Women with DCIS
Thursday, 9 July 2020   by www.diagnosticimaging.com    
Breast MRI and tumour biology predict axillary lymph node response to neoadjuvant chemotherapy for breast cancer
Thursday, 26 December 2019   by cancerimagingjournal.biomedcentral.com    
Breast MRI Coding Gets an Overhaul in 2019
Wednesday, 9 January 2019   by www.aapc.com    
How accurate are volumetric software programs when compared to breast MRI?
Thursday, 27 July 2017   by www.radiologybusiness.com    
Additional Breast Cancer Tumors Found on MRI After Mammography May Be Larger, More Aggressive
Wednesday, 9 December 2015   by www.oncologynurseadvisor.com    
Preoperative MRI May Overdiagnose Contralateral Breast Cancer
Wednesday, 2 December 2015   by www.cancertherapyadvisor.com    
BI-RADS and breast MRI useful in predicting malignancy
Wednesday, 30 May 2012   by www.oncologynurseadvisor.com    
MRI Resources 
MRI Reimbursement - Case Studies - Portals - Safety Training - Chemistry - Lung Imaging
 
Echo Planar ImagingInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
Echo Planar Imaging Timing Diagram (EPI) Echo planar imaging is one of the early magnetic resonance imaging sequences (also known as Intascan), used in applications like diffusion, perfusion, and functional magnetic resonance imaging. Other sequences acquire one k-space line at each phase encoding step. When the echo planar imaging acquisition strategy is used, the complete image is formed from a single data sample (all k-space lines are measured in one repetition time) of a gradient echo or spin echo sequence (see single shot technique) with an acquisition time of about 20 to 100 ms. The pulse sequence timing diagram illustrates an echo planar imaging sequence from spin echo type with eight echo train pulses. (See also Pulse Sequence Timing Diagram, for a description of the components.)
In case of a gradient echo based EPI sequence the initial part is very similar to a standard gradient echo sequence. By periodically fast reversing the readout or frequency encoding gradient, a train of echoes is generated.
EPI requires higher performance from the MRI scanner like much larger gradient amplitudes. The scan time is dependent on the spatial resolution required, the strength of the applied gradient fields and the time the machine needs to ramp the gradients.
In EPI, there is water fat shift in the phase encoding direction due to phase accumulations. To minimize water fat shift (WFS) in the phase direction fat suppression and a wide bandwidth (BW) are selected. On a typical EPI sequence, there is virtually no time at all for the flat top of the gradient waveform. The problem is solved by "ramp sampling" through most of the rise and fall time to improve image resolution.
The benefits of the fast imaging time are not without cost. EPI is relatively demanding on the scanner hardware, in particular on gradient strengths, gradient switching times, and receiver bandwidth. In addition, EPI is extremely sensitive to image artifacts and distortions.
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• View the DATABASE results for 'Echo Planar Imaging' (19).Open this link in a new window


• View the NEWS results for 'Echo Planar Imaging' (1).Open this link in a new window.
 
Further Reading:
  Basics:
New Imaging Method Makes Brain Scans 7 Times Faster
Sunday, 9 January 2011   by www.dailytech.com    
MRI Resources 
Brain MRI - Jobs pool - Stent - Libraries - IR - Pathology
 
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