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MRI Safety
Safety Guidance
 
 
 
 
  • Safety Guidance
Radiology Safety Open this link in a new window
'Safety' in MRI News (69) and in MRI Resources (43) 
Cardiac Stent 

The MRI safety of cardiac stents is dependent of the material, the examined part of the body and the used field strength. A susceptibility artifact is expected also in low magnetic fields, but less.
mri safety guidance
MRI Safety Guidance
Most of the used materials are non-magnetic, for this case there is no risk for movement caused through the magnetic field. If the cardiac stent is outside the region of the radio frequency pulse, also the risk of e.g. heating is low.

• View the DATABASE results for 'Cardiac Stent' (4).Open this link in a new window

 
Further Reading:
  Basics:
Guidelines for the Management of Patients with Coronary Artery Stents Referred for MRI Procedures
Tuesday, 1 January 2019   by www.ismrm.org    
Cochlear Implant 

mri safety guidance
MRI Safety Guidance
Not necessarily a contraindication, but the examination may damage or impair it. Interference in electronic cochlear implants and ferromagnetic mechanical stapedial replacements has been reported.

• View the DATABASE results for 'Cochlear Implant' (2).Open this link in a new window

 
Further Reading:
  Basics:
Pain, magnet displacement in MRI in patients with cochlear implants
Thursday, 20 November 2014   by medicalxpress.com    
Pediatric and Adult Cochlear Implantation1
2003   by radiographics.rsnajnls.org    
  News & More:
FDA Approves MED-EL's SYNCHRONY Cochlear Implant
Friday, 23 January 2015   by www.businesswire.com    
Hazards: Scanners Can Damage Hearing Implants
Wednesday, 10 December 2008   by www.nytimes.com    
Nerve Stimulator 

An implantable medical device that stimulates nerves.
mri safety guidance
MRI Safety Guidance
Depending on the used MRI field strength not necessarily a contraindication, but the examination may damage or impair it. In mid to high field MRI machines the reduction of the SAR value during the scan is necessary to avoid the risk of heating.

• View the DATABASE results for 'Nerve Stimulator' (2).Open this link in a new window

 
Further Reading:
  News & More:
FDA announces recall of Abbott neurostimulation devices after MRI-related issues lead to 73 injuries
Thursday, 14 September 2023   by healthimaging.com    
Off-Label Magnetic Resonance Imaging (MRI) in Patients with Persistent Pain with Spinal Cord Stimulators: A Case Series
Friday, 19 August 2022   by www.dovepress.com    
Stimwave’s MRI-safe, injectable neurostimulator gets FDA nod
Tuesday, 9 August 2022   by www.fiercebiotech.com    
FDA approves expanded, full-body MRI compatibility with Inspire therapy
Thursday, 14 July 2022   by www.massdevice.com    
Medtronic DBS systems cleared for full-body MRI in Europe
Wednesday, 22 April 2015   by seekingalpha.com    
Stimwave Announces First Full Body 3-Tesla MRI Conditional Neuromodulation Medical Implantable Device (AMID) Without Any Limitations for Body Part Imaging
Tuesday, 10 March 2015   by www.businesswire.com    
Intra Uterine Pessar 

Most of the commonly used intrauterine contraceptive devices (IUD) do not move under the influence of the magnetic field, do not heat up during sequences usually applied for pelvic imaging, and do not produce major artifacts in vitro or in vivo.
mri safety guidance
MRI Safety Guidance
Thus, patients with either all plastic or copper IUDs can be safely imaged with magnetic resonance imaging (MRI) machines.
Passive Device 

The term 'passive' refers to any medical device that serves its function without the supply of power. Examples of passive devices include but are not limited to aneurysm clips, shunts, scalpels, IV poles, and oxygen bottles.

• View the DATABASE results for 'Passive Device' (2).Open this link in a new window

 
Further Reading:
  Basics:
Physics of MRI Safety
   by www.aapm.org    
  News & More:
FDA Releases New Guidance On Establishing Safety, Compatibility Of Passive Implants In MR Environments
Tuesday, 16 December 2014   by www.meddeviceonline.com    
Prostheses 

Generally, joint and limb prostheses presents low MRI risks of heating and magnetic attraction, but image artifacts can be caused by them.
mri safety guidance
MRI Safety Guidance
If possible, prostheses should be removed prior to the MR examination. Risks are depending on the field strength, the used material, the shape and the length of prostheses. A material like titanium alloy is safely. The use of a low to mid field MRI device presents also a high safety.

• View the DATABASE results for 'Prostheses' (2).Open this link in a new window

Prosthetic Heart Valves 

The interactions between the most tested heart valve prostheses and the magnetic field of MRI devices are of no significance. However, there are many different types of heart valve prostheses and in the particular case their MRI safety should be checked.
mri safety guidance
MRI Safety Guidance
Prosthetic heart valves, depending on the type and the material, are not necessarily considered to be dangerous in fields up to 3T. Patients should not undergo high field MRI examinations if valve dehiscence is clinically suspected.

• View the DATABASE results for 'Prosthetic Heart Valves' (2).Open this link in a new window

 
Further Reading:
  Basics:
Prosthetic Heart Valves: Evaluation of Magnetic Field Interactions, Heating, and Artifacts at 1.5 T
2000   by www.imrser.org    
  News & More:
Guidelines for the Management of Patients with Heart Valve Prostheses and Annuloplasty Rings Referred for MRI Procedures
Tuesday, 1 January 2019   by www.ismrm.org    
Codman Neuro develops new MRI-resistant programmable valve for treatment of hydrocephalus
Tuesday, 22 September 2015   by www.news-medical.net    
Skin Patches 

Pharmaceutical products in transdermal skin patches may cause burns due to the absorption of RF energy.
mri safety guidance
MRI Safety Guidance
Such patches must be removed prior to MR examinations.
Tattoos 

Tattoos with metallic or ferromagnetic color ingredients can distort MR images. Skin irritations or burns caused by heating of the metallic particles due to the radio frequency pulse are also possible, but rare.
mri safety guidance
MRI Safety Guidance
Patients should be informed about the possible risk, and scanning should be stopped immediately if they feel heat. Metallic make-up can even be pulled into the eye by magnetic forces and should be removed previous to the MRI scan.

• View the DATABASE results for 'Tattoos' (2).Open this link in a new window

 
Further Reading:
  News & More:
Going for an MRI scan with tattoos? First prospective study on risk assessment
Wednesday, 30 January 2019   by www.cbs.mpg.de    
Women with permanent make-up tattoos suffer horrific facial burns after going in for MRI scans - which create an electric current in the ink
Monday, 4 July 2016   by www.dailymail.co.uk    
Wires (MRI Safety Risk) 

Pacemaker lead wires, ECG, and plethysmographic cables can also as surface-coil connections act as antennae. Usually the materials of such wires are not ferromagnetic.
mri safety guidance
MRI Safety Guidance
Gradient and radio frequency fields may induce current into these wires and thus cause fibrillations and burns. This presents a risk to the patient and must be eliminated before the examination. The risk of heating during the MRI scan is dependent on the length and the material of these wires as well as the used field strength. If these wires are outside the RF field there is no risk of heating to expect.

• View the DATABASE results for 'Wires (MRI Safety Risk)' (2).Open this link in a new window

 
Further Reading:
  Basics:
A Primer on Medical Device Interactions with Magnetic Resonance Imaging Systems
   by govpulse.us    
  News & More:
Newer Heart Devices Safe During MRI
Monday, 23 August 2004   by www.hospimedica.com    
MRI in Patients with Implanted Devices: Current Controversies
Monday, 1 August 2016   by www.acc.org    
Redesigned systems may increase access to MRI for patients with implanted medical devices
Tuesday, 5 May 2015   by medicalxpress.com    
  Intro top
Radiology Safety Open this link in a new window
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