and CORRECT Answers
what are some sources for MRI recommendations and -Peer-reviewed literature
guidelines? -Food and Drug Administration
-American College of Radiology
-International Society for Magnetic Resonance in Medicine
-Institute for Magnetic Resonance, safety, education, and research
-The joint Commission
-Other organizations
Name the 3 MRI electromagnetic fields? -Static (B0)
-Gradient
-Radiofrequency
The MRI system is____________ ! ALWAYS ON!
(24/7/365)
what are the types of MRI Systems & give their magnetic -Commercially available: 0.2- to 7-T
field strength: -Most common: 1.5-T
-Highest in clinical setting: 3-T
-Research MR systems: 4-T, 7-T, and 10.5-T
what is the Ekosi 20 Tesla project? a goal plan to develop an integrated magnet and RF shimming coil approach for
human MR imaging and spectroscopy at fields 14T & beyond. More specifically, a 20
T magnetic resonance for human brain studies/ neuroscience.
Describe the bioeffects of the static magnetic field: -No serious bioeffects due to short-term exposures
-Missile/projectile injuries and fatalities
-Implant and device related injuries and fatalities
Describe transient bioeffects of the static magnetic field: -Vertigo
-Headaches
-Nausea
-Metallic Taste
-Other Physiological Changes
T/F? true
Transient effects are temporary.
No Bioeffects associated with ____________ exposures long-term
missile effect refers to the capability of the MRI magnetic field to attract a ferromagnetic object
into the scanner with considerable force. This can pose a significant risk to a patient
in the scanner and to anyone who is in the path of the attracted object.
, Which field is associated with the Missile Effect Accidents? -Fringe field attracts ferromagnetic object(s), drawing them rapidly, with
considerable force. Thus, an object becomes a projectile.
What are considerations for an object(s) potential to -Type of metal and how "magnetic" it is
become a missile? -Size (mass) of the metallic material
-Magnetic compared to nonmagnetic material
-Examples= wheelchairs, gurney's, etc.
How can we prevent ferromagnetic objects from entering -Participate in MRI safety training, repeat ANNUALLY
the MRI environment? -Review MRI safety policies and procedures
-Understand that the magnetic field is always "ON"
-No objects containing magnetic parts permitted
-Patients and study subjects must all where gowns
-Undergo screening before entering MRI environment
What are Physicians, MRI Technologists, Nurses and other -Stethoscopes
hospital staff prohibited from taking into MR system room? -bandage scissors
-hemostats, clipboards
-needles
-pens
-pen lights
-keys
-otoscopes
-percussion hammers
-ID badges with metallic clips
-cards with magnetic strips
-analog watches, etc.
why is it advised that patients and research subjects wear Burns may occur during MRI due to metallic microfibers
gowns?
What items can be taken into the MR system room? -Only specially-designed items permitted
-Labeled "nonmagnetic', "MR safe" or "MR conditional"
-For MR conditional, follow the conditions or requirements
-No "unknown" items or equipment allowed in the scanner room
what are special considerations for Custodial Workers? -Special training and instructions are required
-Nonmagnetic custodial cart and other supplies required
what does FMDS stand for? ferromagnetic detection systems
which medical society describes the implementation of American College of Radiology (founded in 1923)
"zones" within the MR environment?
How can we control access to the MRI Environment? -have an MRI safety-trained individual monitor the area
-Use special door locking mechanisms
-Post "Danger" signs
-Use ferromagnetic detection systems (FMDS)
-Implement "Zones" described by the ACR
"Zones" help to control access to: the MRI environment
Zone 1 is accessible by: the general public