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Searchterm 'MRI scan' was also found in the following services: 
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News  (319)  Resources  (55)  Forum  (21)  
 
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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• Related Searches:
    • K-Space Trajectory
    • Diffusion Weighted Imaging
    • Functional Magnetic Resonance Imaging
    • Susceptibility Artifact
    • Gradient Echo
 
Further Reading:
  Basics:
New Imaging Method Makes Brain Scans 7 Times Faster
Sunday, 9 January 2011   by www.dailytech.com    
Searchterm 'MRI scan' was also found in the following services: 
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Ultrasound  (1) Open this link in a new window
Esaote S.p.A.MRI Resource Directory:
 - Manufacturers -
 
www.esaote.com The Esaote Group, founded in the 1980's, is a global leader in research, production, and marketing of medical diagnostic equipment and related services. Esaote offers integrated diagnostic solutions for ultrasound electromedical diagnostic systems, and MRI. The Esaote MR equipment is dedicated for specific clinical applications, as distinguished from conventional whole body MRI systems. This MRI product family is based on a unique, proprietary technology developed specifically for musculoskeletal imaging.
The Italian based company is a member of the Bracco Group.
Esaote North America is the exclusive U.S. distributor of MRI devices manufactured by Esaote.

MRI Scanners:

0.2T to 0.31T:
Vet-MR (Based on the E Scan XQ, dedicated to the veterinarian practice.)
Contact Information
MAIL
ESAOTE S.p.A. MRI DIvision
Via Siffredi, 58
16153 Genova
Italy
PHONE
+39-010-6547.380
FAX
+39-010-6547.241
CONTACT INFO PAGE
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• View the NEWS results for 'Esaote S.p.A.' (1).Open this link in a new window.
 
Further Reading:
  Basics:
E-Scan, 510(k) Summary(.pdf)
Saturday, 15 May 2004   by www.accessdata.fda.gov    
  News & More:
Esaote Obtains EC MDR Certification for the New Magnifico Open Total-body Magnetic Resonance System
Sunday, 5 December 2021   by www.itnonline.com    
Global Magnetic Resonance Imaging Systems Market Data Analysis 2019-2025 Aurora Imaging Technology, Esaote, Fonar Corporation
Wednesday, 8 January 2020   by citiblognews.com    
MRI Resources 
Safety pool - IR - Functional MRI - Universities - Examinations - Artifacts
 
Faraday Shield
 
In electromagnetism, the Faraday cage or shield is an application of Gauss's law, one of Maxwell's equations. Gauss's law describes the distribution of electrical charge on a conducting form, such as a sphere, a plane, a torus, etc. Intuitively, since like charges repel each other, charge will "migrate" to the surface of the conducting form, as described below. The application is named after physicist Michael Faraday, who built the first Faraday cage in 1836, to demonstrate his finding. A Faraday shield is used generally for any kind of electrostatic shielding.
In MRI, one use of the Faraday shield is the shielding of the scanning room, to block incoming radio frequency (RF) signals which would contaminate the send and received signals of the MRI scanner, and it suppresses RF signals, which would else pollute the environment around.
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Further Reading:
  Basics:
Faraday's Law
   by hyperphysics.phy-astr.gsu.edu    
Faraday_shield
   by en.wikipedia.org    
  News & More:
Electrical eddy currents in the human body: MRI scans and medical implants
   by www.phy.olemiss.edu    
Searchterm 'MRI scan' was also found in the following services: 
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News  (319)  Resources  (55)  Forum  (21)  
 
G-SCANInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.esaote.de/04_kernspin/gscan/gscan.htm From Esaote S.p.A.; Esaote introduced the new G-SCAN at the RSNA in Dec. 2004. The G-SCAN covers almost all musculoskeletal applications including the spine. The tilting gantry is designed for scanning in weight-bearing positions. This unique MRI scanner is developed in line with the Esaote philosophy of creating high quality MRI systems that are easy to install and that have a low breakeven point.
Device Information and Specification
CLINICAL APPLICATION
CONFIGURATION
Spine, extremity, shoulder, flex coil, knee dual phased array, ankle//foot dual phased array, hand//wrist dual phased array
PULSE SEQUENCES
SE, GE, IR, STIR, TSE, 3D CE, GE-STIR, 3D GE, ME, TME, HSE
IMAGING MODES
Single, multislice, volume study, fast scan, multi slab, cine
FOV
100 up to 350 mm, 25 mm displayed
512 x 512
MEASURING MATRIX
256 x 256 maximum
MAGNET TYPE
Permanent
BORE DIAMETER
or W x H
33 cm H, open
POWER REQUIREMENTS
100/110/200/220/230/240 V
STRENGTH
25 mT/m
5-GAUSS FRINGE FIELD
180 cm
Passive
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Searchterm 'MRI scan' was also found in the following services: 
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GE HealthcareMRI Resource Directory:
 - Manufacturers -
 
www.gehealthcare.com GE Healthcare is the result of the merger between GE Medical and Amersham Health in Nov. 2004, after GE acquired Amersham Health for 9.5 billion in Oct. 2003. Jeffrey R. Immelt, Chairman of the Board and Chief Executive of General Electric, said, 'Amersham's diagnostic pharmaceutical and life sciences business will add new, high growth platforms to GE Medical's diagnostic imaging, services and healthcare information technology businesses'. GE Healthcare, a UK company, is a unit of General Electric (NYSE: GE). GE Healthcare is a global leader in medical imaging, diagnostic imaging contrast agents, interventional procedures, healthcare services, and information technology. For more than 100 years, health care providers have relied on GE Medical Systems, now GE Healthcare, for high quality medical technology and productivity solutions. GE Healthcare, headquartered now at formerly seat of Amersham Health in Great Britain, operates facilities around the world. Global Operations include organizations on the Americas, Europe, and Asia, including India, Japan, Korea China, Thailand and Vietnam.

MRI Scanners:

MRI Contrast Agents:
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Contact Information
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Further Reading:
  Basics:
GE Medical's new name: GE Healthcare
Friday, 6 February 2004   by milwaukee.bizjournals.com    
  News & More:
GE HealthCare introduces new MRI agent Pixxoscan
Friday, 28 April 2023   by www.medicaldevice-network.com    
GE Healthcare Names New 3.0T MRI System for Today's Healthcare Heroes
Monday, 13 December 2021   by www.itnonline.com    
GE Healthcare announces FDA approval of macrocyclic MRI contrast agent Clariscan
Monday, 4 November 2019   by www.itnonline.com    
GE Healthcare expands MRI contrast media product range in Europe with launch of macrocyclic agent ClariscanTM
Wednesday, 1 March 2017   by www.businesswire.com    
A*STAR & GE Healthcare Collaborate On Med Tech
Monday, 22 December 2014   by www.asianscientist.com    
MRI Resources 
Case Studies - Developers - Calculation - Shielding - MRI Accidents - Process Analysis
 
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