Safety Zones
Personnel
General MRI Safety
To Scan or Not to Scan?
Scanner Safety
100
How many safety zones are in an MRI environment?
What is four?
100
Who are non-MRI personnel?
Who are patients, visitors, or facility staff who have not undergone formal safety training.
100
When entering the room during a quench the door should be what?
What is propped open?
100
If a patient complains of tingling on their skin it is most likely due to this.
What is PNS?
100
The three independent magnetic fields that create MRI safety challenges.
What are the Static Magnetic Field, the Time-Varying Radiofrequency Field, and the Time-Varying Gradient Magnetic Field?
200
Who is allowed in Zone 1 of MRI?
Who is the general public?
200
Level 1 personnel have done what?
What is passed minimal safety education to ensure their own safety?
200
What does SAR stand for?
What is Specific Absorption Rate?
200
A patient has a bullet in their body. What questions should we be asking?
What is location, size, and when did it happen?
200
This zone is not routinely monitored by MR personnel. It is where potentially harmful gases escape during a quench.
What is the Cryogen Venting Zone?
300
Zone two is the interface between what?
What is uncontrolled zone 1 and the strictly controlled zones 3 and 4?
300
True or False: The security department can grant Access into Zone IV (magnet rooms) during non business hours without consent from the MRI personnel.
What is False?
300
Where do proximity burns come from?
Where is the side of the scanner?
300
What is MR conditional?
300
Shielding must be built into this zone to contain the fringe field.
What is Zone 4?
400
Wat are two worries of being in zone three?
What are the MR scanner's static and time-varying magnetic fields?
400
Per 2020 ACR guidelines, for a facility with two or more MR machines that share a single Zone III area where both machines are in use at the same time, there will be a minimum of how many designated MRI personnel during business hours?
What is 3?
400
Kissing burns are caused from what?
What is a closed loop of electrical current in the patient?
400
In 2014 a child had a MRI after an EKG. While within the unit, she experienced sever abdominal pain and smoke was seen rolling off of the patient. What was the cause?
An EKG lead was left on the patient. The lead heated up to the point of severely burning the patient.
400
The most commonly used clinical magnet.
What is a superconducting MRI unit?
500
Zone 4 needs to have a sign stating what?
What is "The Magnet is On."?
500
Level 2 personnel should have a direct line of sight of what?
What is all exits and entrances?
500
The most common element used for cryogens in MRI.
What is Helium?
500
What is a common type of medical implant that would be contraindicated for an MRI exam?
Pacemaker, Aneurysm Clips, etc.
As a result, additional information will need to be provided before patients can be scanned.
500
These are flashing lights induced in the retina due to changing magnetic fields.
What is magnetophosphenes?
600
What zone is the area around the quench pipe on the roof?
What is zone 3?
600
What does MRSO stand for?
What is Magnetic Resonance Safety Officer?
600
What is the longest period we have to wait post iron infusion therapy?
What is 3 months for Feraheme?
600
What type of (material) implant/medical device can be accepted as safe without any further medical screening?
What is titanium?
600
The layering of flux lines or magnetic fields of different strengths.
What is the Spatial Magnetic Gradient?
700
In the event of an emergency, which MRI zone should emergency response teams never enter without proper MR screening and supervision?
What is zone 4?
700
This type of personnel is not only responsible for themselves in Zone 3 and 4, but responsible for patients and/or visitors.
What is level 2 personnel?
700
What is another name for the gradient magnetic field?
What is Time Varying Magnetic Field?
700
A stent is an example of a passive or active implant?
What is a passive implant?
700
What does RMS stand for in B1+RMS?
What is Root Mean Squared?
800
What architectural and procedural features are typically required in Zone II to maintain MRI safety and prevent unauthorized access to Zones III and IV?
What is controlled doorways, patient/visitor screening areas, safety signage, and physical barriers?
800
What is the legal or accreditation consequence if a facility allows a non-screened, non-trained person to escort a patient into Zone IV?
What is Violation of ACR and Joint Commission MRI safety standards; potential liability for injury?
800
The strong, _____ magnetic field of the MRI scanner will pull on magnetic materials and may cause unwanted movement of the medical device.
What is static magnetic field?
800
Why have patients remove their medication patches?
What is heating and medicine overdose?
800
Another name for a twisting force.
What is torque?