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 'Fringe Field' 
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Result : Searchterm 'Fringe Field' found in 3 terms [] and 62 definitions []
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MRI Resources 
Spectroscopy - Portals - Musculoskeletal and Joint MRI - MRI Accidents - Case Studies - Research Labs
 
RELAX 0.35T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.isoltech.co.kr/english/product/035t.htm From ISOL Technology
'RELAX is open type MRI system created by making up for the weakness of existing conventional MR systems and applying the strength and the application of the middle to high field MR without uncompromising the image quality.
RELAX offers you a premium mix of form, performance and functionality that are patient and user friendly beyond comparison. - New breed of MRI pursuing - patients comfort'
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open
Head, C-spine, L-spine, TMJ, Knee, Shoulder, General purpose, Phased Array System: 4 digital receiver channels (Up to 12 channels)
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES
2D/3D Spin echo, 2D/3D Gradient echo, 2D/3D Fast spin echo, Inversion recovery, 2D/3D Fast gradient echo sequences, FLAIR/STIR, 2D/3D TOF
IMAGING MODES
3D volume imaging (MIP, MPR) MR Angiography package
30 cm
MAGNET TYPE
Permanent
40 cm diameter (patient)
MAGNET WEIGHT
13500 kg
H*W*D
170 x 210 x 130 cm
COOLING SYSTEM TYPE
Water-cooled coil and air-cooled amplifier
STRENGTH
25 - 30 mT/m
5-GAUSS FRINGE FIELD
lower than 2.4 m from the iso-center
Passive and active
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MRI Resources 
Case Studies - Safety Training - Equipment - Non-English - Spine MRI - Journals
 
Room Shielding
 
Magnetic shielding through the use of high permeability material in the walls (plus floor and ceiling) of the magnet room. Room shielding can be complete (e.g., six sides of a box, Faraday cage), or partial if the fringe field is to be reduced only in certain areas (see also Magnetic Shielding).
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• View the DATABASE results for 'Room Shielding' (5).Open this link in a new window

 
Further Reading:
  Basics:
Faraday's Law
   by hyperphysics.phy-astr.gsu.edu    
  News & More:
Magnetic Sensitivity of MRI Systems to External Iron: The Design Process
   by www.integratedsoft.com    
MRI Resources 
Brain MRI - Research Labs - Education pool - MRI Technician and Technologist Schools - Nerve Stimulator - Supplies
 
S-SCANInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
www.esaote.com/products/MRI/sScan/products1.htm From Esaote S.p.A.; Esaote introduced the S-SCAN at RSNA in November 2007. The S-SCAN is a dedicated joint and spine MR scanner derived from the company's earlier G-SCAN system. Unlike the G-SCAN, neither the patient table nor the magnet can rotate from horizontal to vertical position. The patient table can only moved manually. Improved electronics, new coils for lumbar and cervical spine, new pulse sequences, a modified version of the magnet poles and gradient coils are used with a new software release in the S-SCAN.
Esaote North America is the exclusive U.S. distributor of this MRI device.
Device Information and Specification
CLINICAL APPLICATION
CONFIGURATION
4-channel phased array spine coil, 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
25 cm
MEASURING MATRIX
256 x 256 maximum
MAGNET TYPE
Permanent
33 cm H, open
POWER REQUIREMENTS
3 kW; 110/220 V single phase
STRENGTH
25 mT/m
5-GAUSS FRINGE FIELD, radial/axial
180 cm
Passive
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• View the DATABASE results for 'S-SCAN' (3).Open this link in a new window


• View the NEWS results for 'S-SCAN' (1).Open this link in a new window.
 
Further Reading:
  News & More:
Wichita medical facility gets first Hologic S-scan MRI in the United States
Friday, 19 October 2007   by wichita.bizjournals.com    
MRI Resources 
Software - Spine MRI - General - PACS - Distributors - Safety pool
 
Shielded Gradient CoilsInfoSheet: - Coils - 
Intro, 
Overview, 
etc.MRI Resource Directory:
 - Coils -
 
Current-carrying gradient coils with reduced gradient fringe field inside of the magnet cryostat structures like cryoshields and He-vessel. The shielding can be accomplished by secondary actively driven coils or by passive screens, which are inductively coupled to the gradient coils. In both cases eddy currents outside of the gradient system will be reduced.

See also Eddy Currents.
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• View the DATABASE results for 'Shielded Gradient Coils' (4).Open this link in a new window

 
Further Reading:
  Basics:
Faraday's Law
   by hyperphysics.phy-astr.gsu.edu    
MRI Resources 
Manufacturers - Breast MRI - Developers - Musculoskeletal and Joint MRI - Image Quality - Patient Information
 
Signa 3.0T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.gehealthcare.com/usen/mr/s_excite3/index.html (Signa VH/i 3.0T)
With GE Healthcare leading-edge technology in ultra-high-field imaging. The 3 T VH/i provides a platform for advanced applications in radiology, cardiology, psychology and psychiatry. Real-time image processing lets you acquire multislice whole brain images and map brain functions for research or surgical planning. And the 3 T Signa VH/i is flexible enough to provide clinicians with high performance they require. It can provide not only outstanding features in brain scanning and neuro-system research, but also a wide range of use in scanning breasts, extremities, the spine and the cardiovascular systems.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Cylindrical - high homogeneity
T/R quadrature head, T/R quadrature body, T/R phased array extremity (opt)
SYNCHRONIZATION
ECG/peripheral, respiratory gating
PULSE SEQUENCES
SE, IR, 2D/3D GRE, FGRE, RF-spoiled GRE, FSE, Angiography: 2D/3D TOF, 2D/3D phase contrast vascular
IMAGING MODES
Single, multislice, volume study, fast scan, multi slab, cine, localizer
SINGLE SLICE
100 Images/sec with Reflex100
MULTISLICE
100 Images/sec with Reflex100
1 cm to 40 cm continuous
2D 0.5-100mm in 0.1mm incremental
1280 x 1024
MEASURING MATRIX
128x512 steps 32 phase encode
PIXEL INTENSITY
256 gray levels
55cm
MAGNET WEIGHT
15102 kg incl. cryogen's
H*W*D
260cm x 238cm x 265cm
POWER REQUIREMENTS
480 or 380/415, 3 phase ||
COOLING SYSTEM TYPE
Closed-loop water-cooled grad.
Less than 0.14 L/hr liquid He
STRENGTH
40mT/m
5-GAUSS FRINGE FIELD, radial/axial
5.4 m x 3.2 m
Superconductive + hi order active
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• View the DATABASE results for 'Signa 3.0T™' (2).Open this link in a new window

MRI Resources 
Education pool - Research Labs - Abdominal Imaging - Veterinary MRI - Education - Nerve Stimulator
 
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