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Result : Searchterm 'MR Compatible' found in 0 term [] and 4 definitions [], (+ 9 Boolean[] results
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5 Gauss Line
 
This line specifies the perimeter around a MR scanner within which the static magnetic fields are higher than five gauss. Five gauss and below are considered 'safe' levels of static magnetic field exposure for the general public.
Portable devices requiring a separation distance between the device and the MR magnet, should not be considered 'MR Safe', 'MR Compatible', or intended for use in the MR environment. Typically the 5 gauss line is the only location where the static magnetic field strength is specified around a MR scanner. Therefore, labeling specifying a separation distance between the MR magnet and the device to ensure safe or proper operation of the device should be avoided.

See also the related poll result: 'In 2010 your scanner will probably work with a field strength of'
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• For this and other aspects of MRI safety see our InfoSheet about MRI Safety.
• Patient-related information is collected in our MRI Patient Information.

 
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• Related Searches:
    • 5 Gauss Limit
    • Cardiac Pacemaker
    • Resistive Magnet
    • Magnetic Fringe Field
    • Permanent Magnet
 
Further Reading:
  News & More:
Boston Scientific and Biophan in MRI Collaboration
Friday, 21 November 2003   by www.medimaging.net    
World's First Portable MRI Cleared by FDA
Monday, 17 February 2020   by www.medgadget.com    
MRI Safety Resources 
Stimulator pool - Safety Training - Pacemaker - Pregnancy - Implant and Prosthesis pool
 
MR Compatibility
 
mri safety guidance
MRI Safety Guidance
If a device is to be labeled MR Safe, the following information should be provided:
•
Data demonstrating that when the device is introduced or used in the MRI environment (i.e. the MRI scan room) it does not pose an increased safety risk to the patient or other personnel,
•
a scientifically-based rationale for why data are not necessary to prove the safety of the device in the MR environment (for example, a passive device made entirely of a polymer known to be nonreactive in strong magnetic fields).

If a device is to be labeled MR Compatible, the following information should be provided:
•
Data demonstrating that when the device is introduced or used in the MRI environment, it is MR safe that it performs its intended function without performance degradation, and that it does not adversely affect the function of the MRI scanner (e.g. no significant image artifacts or noise). Any image artifact or noise due to the medical device should be quantified (e.g., % volume affected, signal to noise ratio),
•
a scientifically-based rationale for why data are not necessary to prove the compatibility of the device in the MRI environment.

Test Conditions:
The static magnetic field strength (Gauss (G) or Tesla (T)) to which the device was tested and demonstrated to be MRI 'safe', 'compatible', or 'intended for use in' should be related to typical machine ratings (e.g. 0.5 T, 1.5 T, 2.0 T, and shielded or unshielded magnet, etc).
The same conditions should be used for the spatial gradient (field strength per unit distance (i.e., G/cm)) in which the device was tested and demonstrated to be 'safe', 'compatible', or 'intended for use in'.
Also the RF transmitter power used during testing of the device, should be related to this typical machine ratings.
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• View the DATABASE results for 'MR Compatibility' (4).Open this link in a new window


• View the NEWS results for 'MR Compatibility' (2).Open this link in a new window.
 
Further Reading:
  Basics:
Newer Heart Devices Safe During MRI
Monday, 23 August 2004   by www.hospimedica.com    
  News & More:
Boston Scientific and Biophan in MRI Collaboration
Friday, 21 November 2003   by www.medimaging.net    
MRI safety targeted as new group offers credentialing test
Monday, 12 January 2015   by www.modernhealthcare.com    
FDA Releases New Guidance On Establishing Safety, Compatibility Of Passive Implants In MR Environments
Tuesday, 16 December 2014   by www.meddeviceonline.com    
MRI Resources 
Societies - Breast Implant - Veterinary MRI - MR Myelography - MRI Technician and Technologist Jobs - Anatomy
 
MRI SafetyMRI Resource Directory:
 - Safety -
 
There are different types of contraindications that would prevent a person from being examined with an MRI scanner. MRI systems use strong magnetic fields that attract any ferromagnetic objects with enormous force. Caused by the potential risk of heating, produced from the radio frequency pulses during the MRI procedure, metallic objects like wires, foreign bodies and other implants needs to be checked for compatibility. High field MRI requires particular safety precautions. In addition, any device or MRI equipment that enters the magnet room has to be MR compatible. MRI examinations are safe and harmless, if these MRI risks are observed and regulations are followed.

Safety concerns in magnetic resonance imaging include:
•
the magnetic field strength;
•
possible 'missile effects' caused by magnetic forces;
•
the potential for heating of body tissue due to the application of the radio frequency energy;
•
the effects on implanted active devices such as cardiac pacemakers or insulin pumps;
•
magnetic torque effects on indwelling metal (clips, etc.);
•
the audible acoustic noise;
•
danger due to cryogenic liquids;
•
the application of contrast medium;
mri safety guidance
MRI Safety Guidance
It is important to remember when working around a superconducting magnet that the magnetic field is always on. Under usual working conditions the field is never turned off. Attention must be paid to keep all ferromagnetic items at an adequate distance from the magnet. Ferromagnetic objects which came accidentally under the influence of these strong magnets can injure or kill individuals in or nearby the magnet, or can seriously damage every hardware, the magnet itself, the cooling system, etc.. See MRI resources Accidents.
The doors leading to a magnet room should be closed at all times except when entering or exiting the room. Every person working in or entering the magnet room or adjacent rooms with a magnetic field has to be instructed about the dangers. This should include the patient, intensive-care staff, and maintenance-, service- and cleaning personnel, etc..
The 5 Gauss limit defines the 'safe' level of static magnetic field exposure. The value of the absorbed dose is fixed by the authorities to avoid heating of the patient's tissue and is defined by the specific absorption rate. Leads or wires that are used in the magnet bore during imaging procedures, should not form large-radius wire loops. Leg-to-leg and leg-to-arm skin contact should be prevented in order to avoid the risk of burning due to the generation of high current loops if the legs or arms are allowed to touch. The patient's skin should not be in contact with the inner bore of the magnet.
The outflow from cryogens like liquid helium is improbable during normal operation and not a real danger for patients.
The safety of MRI contrast agents is tested in drug trials and they have a high compatibility with very few side effects. The variations of the side effects and possible contraindications are similar to X-ray contrast medium, but very rare. In general, an adverse reaction increases with the quantity of the MRI contrast medium and also with the osmolarity of the compound.

See also 5 Gauss Fringe Field, 5 Gauss Line, Cardiac Risks, Cardiac Stent, dB/dt, Legal Requirements, Low Field MRI, Magnetohydrodynamic Effect, MR Compatibility, MR Guided Interventions, Claustrophobia, MRI Risks and Shielding.
Radiology-tip.comradRadiation Safety,  Ionizing Radiation
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Medical-Ultrasound-Imaging.comUltrasound Safety,  Absorbed Dose
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• View the DATABASE results for 'MRI Safety' (42).Open this link in a new window


• View the NEWS results for 'MRI Safety' (13).Open this link in a new window.
 
Further Reading:
  Basics:
MRI Safety
2001   by www.fda.gov    
What MRI Sequences Produce the Highest Specific Absorption Rate (SAR), and Is There Something We Should Be Doing to Reduce the SAR During Standard Examinations?
Thursday, 16 April 2015   by www.ajronline.org    
Contrast Agents: Safety Profile
   by www.clinical-mri.com    
  News & More:
How safe is 7T MRI for patients with neurosurgical implants?
Thursday, 17 November 2022   by healthimaging.com    
Newer Heart Devices Safe During MRI
Monday, 23 August 2004   by www.hospimedica.com    
Study: Face Masks Unsafe in MRI Machines
Wednesday, 13 July 2022   by www.laboratoryequipment.com    
COVID-19: Attention shifts to MRI infection control
Thursday, 9 July 2020   by https://www.auntminnieeurope.com/index.aspx?sec=ser§sub=def§pag=dis§ItemID=619012    
FDA Releases New Guidance On Establishing Safety, Compatibility Of Passive Implants In MR Environments
Tuesday, 16 December 2014   by www.meddeviceonline.com    
Modern Implantable Heart Devices Safe For Use In MRI Scans
Wednesday, 16 March 2005   by www.sciencedaily.com    
Searchterm 'MR Compatible' was also found in the following services: 
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News  (19)  Resources  (8)  
 
Unshielded Electric Components
 
Unshielded electric components in the magnet room will excite RF noise artifacts (interference) in different variations. RF 'buzz' will be seen over a range of frequencies on the images. The artifact runs in frequency encoding direction.
mri safety guidance
Image Guidance
Take care to use only MR compatible (special shielded) devices.

See also MR Compatibility.
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Further Reading:
  News & More:
Electrical Noise in Intraoperative Magnetic Resonance Imaging reveals the intricacies of human brain – integrated consciousness with connectors to chilled universe
Sunday, 18 January 2009   by www.indiadaily.com    
MRI Resources 
Diffusion Weighted Imaging - Chemistry - Safety Training - Examinations - Crystallography - MRI Training Courses
 
Signa SP 0.5Tâ„¢ Open ConfigurationInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.gehealthcare.com/usen/mr/index.html From GE Healthcare;
The Signa SP 0.5T™ is an open MRI magnet that is designed for use in interventional radiology and intra-operative imaging. The vertical gap configuration increases patient positioning options, improves patient observation, and allows continuous access to the patient during imaging. The magnet enclosure also incorporates an intercom, patient observation video camera, laser patient alignment lights, and task lighting in the imaging volume.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open
Integrated transmit and receive body coil; optional rotational body coil, head; other coils optional; open architecture makes system compatible with a wide selection of coilsarray
SYNCHRONIZATION
Standard cardiac gating, ECG/peripheral, respiratory gating
PULSE SEQUENCES
Standard: SE, IR, 2D/3D GRE and SPGR, 2D/3D TOF, 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, true chem sat, fat/water separation, single shot diffusion EPI
IMAGING MODES
Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine, slice and frequency zip, extended dynamic range, tailored RF
TR
1.3 to 12000 msec in increments of 1 msec
TE
0.4 to 2000 msec in increments of 1 msec
3cm to 40 cm continuous
2D: 1.4mm - 20mm 3D: 0.2mm - 20mm
1280 x 1024
MEASURING MATRIX
128x512 steps 32 phase//freq.
PIXEL INTENSITY
256 gray levels
60 x 58 cm
POWER REQUIREMENTS
200 - 480, 3-phase
COOLING SYSTEM TYPE
Liquid helium
0.03 L/hr, holds 300 L
STRENGTH
12 mT/m
Active
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• View the DATABASE results for 'Signa SP 0.5T™ Open Configuration' (2).Open this link in a new window

 
Further Reading:
  News & More:
MR Surgical Suite, Improving surgical procedure quality (.pdf)
   by www3.gehealthcare.com    
MRI Resources 
Implant and Prosthesis pool - Services and Supplies - MRI Technician and Technologist Jobs - Intraoperative MRI - MRI Technician and Technologist Career - MRI Physics
 
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