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Result : Searchterm 'Field Strength' found in 1 term [] and 135 definitions []
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Searchterm 'Field Strength' was also found in the following services: 
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Intera Achieva CV™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/intera_achievacv/ From Philips Medical Systems;
The Intera Achieva CV is focused on cardiovascular imaging research and development, generating technology on the cutting edge for modern clinical needs, like easy coronary artery imaging, the evaluation of flow effects in vessels and peripheral angiography with optimal resolution per station.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
Standard: Head, body, cardiac, optional phased array: Spine, pediatric, 3rd party connector; Optional SENSE? coils for all applications
Optional
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES
SE, Modified-SE, IR (T1, T2, PD), STIR, FLAIR, SPIR, FFE, T1-FFE, T2-FFE, Balanced FFE, TFE, Balanced TFE, Dynamic, Keyhole, 3D, Multi Chunk 3D, Multi Stack 3D, K Space Shutter, MTC, TSE, Dual IR, DRIVE, EPI, Cine, 2DMSS, DAVE, Mixed Mode; Angiography: Inflow MRA, TONE, PCA, CE MRA
IMAGING MODES
Single Slice 2D , Multi Single Slice 2D, Multi Slice 2D, 3D, Multi Chunk 3D, Multi Stack 3D
FOV
Over 50 cm
0.05 mm
128 x 128, 256 x 256,512 x 512,1024 x 1024 (64 for Bold img)
MEASURING MATRIX
Variable in 1% increments
PIXEL INTENSITY
Lum.: 120 cd/m2; contrast: 150:1
Variable (op. param. depend.)
60 x 60 cm
POWER REQUIREMENTS
380/400 V
CRYOGEN USE
0.03 L/hr helium
STRENGTH
up to 33 mT/m
5-GAUSS FRINGE FIELD
2.4 m / 3.8 m
Passive and dynamic
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Further Reading:
  News & More:
Coronary Artery Disease: Combined Stress MR Imaging Protocol-One-Stop Evaluation of Myocardial Perfusion and Function1
   by radiology.rsnajnls.org    
Searchterm 'Field Strength' was also found in the following services: 
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Radiology  (5) Open this link in a new windowUltrasound  (2) Open this link in a new window
Larmor Equation
 
The Larmor equation is important because it is the frequency at which the nucleus will absorb energy. The absorption of that energy will cause the proton to alter its alignment and ranges from 1-100 MHz in MRI. The equation states that the frequency of precession of the nuclear magnetic moment is directly proportional to the product of the magnetic field strength (B0) and the gyromagnetic ratio (g). This is stated mathematically as w = g B0.
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• View the DATABASE results for 'Larmor Equation' (6).Open this link in a new window

 
Further Reading:
  News & More:
Electron and proton gyromagnetic ratios
   by www.phys.au.dk    
MRI Resources 
Blood Flow Imaging - Chemistry - Pacemaker - Most Wanted - PACS - Hospitals
 
Legal Requirements
 
mri safety guidance
MRI Safety Guidance
The owner of MRI equipment has to ensure that the equipment does fulfill the local requirements.
In some countries, the requirements are more stringent than in others; in other countries, they are nonexistent.
The user in general is unable to check power output, gradient strength, or even field strength. The manufacturer has to cover authorized hardware and software updates after the initial installation and has to give guarantee for the requirements. Specially designed computer programs usually supervise the power output of MRI devices and will not allow or will interrupt any imaging or spectroscopy procedure exceeding those limits considered safe.

See also European Medicines Agency, FDA information:
www.fda.gov/cdrh/safety/mrisafety.html
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• View the DATABASE results for 'Legal Requirements' (3).Open this link in a new window

 
Further Reading:
  News & More:
A Primer on Medical Device Interactions with Magnetic Resonance Imaging Systems
   by govpulse.us    
Searchterm 'Field Strength' was also found in the following services: 
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News  (13)  Resources  (3)  Forum  (7)  
 
MAGNETOM 7T
 
www.healthcare.siemens.com/magnetic-resonance-imaging/7t-mri-scanner/magnetom-7t From Siemens Medical Systems;
The MAGNETOM 7T is designed as an open research platform. 7T MRI provides anatomical detail at the submillimiter scale, enhanced contrast mechanisms, outstanding spectroscopy performance, ultra-high resolution functional imaging (fMRI), multinuclear whole-body MRI and functional information.
This ultra high field (UHF) MRI device is a research system and not cleared, approved or licensed in any jurisdiction for patient examinations.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Compact
7 Tesla
High-performance, ultra high field coils available. Integration and support for coil developments.
CHANNELS (min. / max. configuration)
32, optional 8 channels TX array
Chemical shift imaging, single voxel spectroscopy, multinuclear imaging optional
IMAGING TECHNIQUES
iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, plaque imaging, radial motion compensation
FOV
40 x 40 x 30 cm³ less than 8% nonlinearity
BORE DIAMETER
or W x H
60 cm
TABLE CAPACITY
200 kg
MAGNET WEIGHT (gantry included)
35017 kg
DIMENSION H*W*D (gantry included)
320 x 240 x 317,5 cm
5-GAUSS FRINGE FIELD
7.9 m / 5.6 m
CRYOGEN USE
Zero boil off rate
COOLING SYSTEM
Water
up to 200 T/m/s
MAX. AMPLITUDE
up to 70 mT/m
Up to 3rd order shim coils, user configurable B0 shim ? B0 maps and ROI definition
POWER REQUIREMENTS
2000 Volts, 650A
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Further Reading:
  Basics:
MAGNETOM 7T Product Brochure
   by www.healthcare.siemens.com    
  News & More:
Ultra-high-field MRI may allow earlier diagnosis of Parkinson's disease
Wednesday, 5 March 2014   by www.sciencedaily.com    
Feasibility of Using Ultra-High Field (7 T) MRI for Clinical Surgical Targeting
Thursday, 17 May 2012   by www.plosone.org    
Ultrahigh-Field MRI May Detect Additional Pathology in EAE
Sunday, 20 October 2013   by www.msdiscovery.org    
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Radiology  (5) Open this link in a new windowUltrasound  (2) Open this link in a new window
MAGNETOM Aera
 
www.healthcare.siemens.com/magnetic-resonance-imaging/0-35-to-1-5t-mri-scanner/magnetom-aera/ From Siemens Medical Systems;
Received FDA clearance in 2010.
The MAGNETOM Aera is a patient friendly, comfortable 1.5 Tesla MRI system with advanced radio frequency chain.
The system is equipped with the Tim 4G and Dot system (Total imaging matrix + Day optimizing throughput), to enhance both productivity and image quality.
Tim 4G technology provides improved SNR. The standard system configuration of 48 radio frequency channels and 204 coil elements creates an imaging matrix that allows maximum use of coil elements at full field of view. Dot provides improved image consistency through new features like auto align, auto FoV and automatic bolus detection.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open bore
Head, spine, torso/ body coil, neurovascular, cardiac, neck, shoulder, knee, wrist, foot//ankle and multi-purpose flex coils. Peripheral vascular, breast, shoulder. Up to 60% more SNR with Tim 4G.
CHANNELS (min. / max. configuration)
48, 64
IMAGING TECHNIQUES
iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, plaque imaging, radial motion compensation, Dixon, improved workflow with Dot, Caipirinha - single digit breath-holds for 3-D body imaging.
MINIMUM TR
3-D GRE: 0.95 (256 matrix)
MINIMUM TE
3-D GRE: 0.22 (256 matrix), Ultra-short TE
FOV
0.5 - 50
BORE DIAMETER
or W x H
At isocenter: L-R 70 cm, A-P (with table) 55 cm
TABLE CAPACITY
250 kg
MAGNET WEIGHT (gantry included)
3121 kg
DIMENSION H*W*D (gantry included)
145 x 231 x 219 cm
5-GAUSS FRINGE FIELD
2.5 m / 4.0 m
CRYOGEN USE
Zero boil off rate, approx. 10 years
COOLING SYSTEM
Water
up to 200 T/m/s
MAX. AMPLITUDE
33 or 45 mT/m
3 linear with 20 coils, 5 nonlinear 2nd-order
POWER REQUIREMENTS
380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; 85 kVA
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MRI Resources 
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