MRI Safety (Post-Test)
Maximum field strength which does not pose potential concern for implanted electronic devices?
1G
3G
5G
10G
Staying outside the 5G line safeguards one from possibility of projectile incident
True
False
Standards for MRI device safety identify devices as either MR safe or MR unsafe?
True
False
Pink represents what MRI Zone?
Zone 0
Zone I
Zone II
Zone III
Zone IV
Zone V
Unscreened family members are allowed in what zones?
Zone I only
Zones I and II
Zones I, II, III
Zones I, II, III, and IV
Zones I and V
Trained physicians, nurses, and code teams may enter Zone IV without additional screening
True
False
What lines do A & B represent in the image above?
5G, 10G
10G, 5G
5G, 100G
100G, 5G
What zone is beyond this door?
Zone 0
Zone I
Zone II
Zone III
Zone IV
Zone V
A coil in a 1.5T scanner is surrounded by?
Oxygen
Carbon
Nitrogen
Helium
Barium
Noise created during scan is due to
Magnet
Radiofrequency transmit-receive system
Helium
Gradient system
What is the website to locate safety ratings for medical devices
Www.mrisafetydevice.com
Www.mrisafety.com
Www.mridevicesafety.com
Www.mridevices.com
All device(s) containing ferromagnetic materials preclude patients from MRI exams
True
False
Is it safe to image cardiac & non-cerebral vascular stents?
Never
> 6 days after implantation
> 6 weeks after implantation
> 6 months after implantation
SAR refers to?
Magnetic Field Strength
Projectile Forces
Radiofrequency coil energy deposition
Translational and rotational forces
If the magnetic field strength is increased from 1.5 T to 3.0 T, the SAR will increase by a factor of?
1
1.5
2
3
4
Transdermal medication patches pose no MRI safety risk
True
False
Tattoos pose no MRI safety risk or detriment to image quality
True
False
Abandoned intracardiac pacer wires are a relative contradiction to MRI?
True
False
NSF refers to?
Neurogenic Systemic Fibrosis
Nephrogenic Sclerosing Fibrosis
Nephrogenic Systemic Fibrosis
Nonspecific Systemic Fibrosis
Time between GBCA injection and development of NSF symptoms is usually:
< 3 months
3 - 6 months
6 - 12 months
> 1 year
NSF is primarily seen in patients with?
Scleroderma
Dermatomyositis
Acute and/or severe chronic kidney insufficiency
Neurofibromatosis
How long after receiving a GBCA can a mother resume breast-feeding?
Continue breast-feeding immediately.
3 days
7 days
14 days
30 days
A pregnant patient is asking you about safety of MRI in pregnancy. Which of the following statements is most appropriate?
MRI is contraindicated in pregnancy, therefore I will speak to the referring clinician about alternative diagnostic testing.
There's no definitive evidence of harmful effects from nonenhanced MRI in pregnant patients. However, long-term safety has not yet been definitively demonstrated.
MRI safety in pregnant patients is well-established, therefore you should proceed with the MRI without any concerns.
Your clinician feels this exam is important for diagnosing your condition, however you should be aware that there is a known risk of fetal mental retardation and/or neurological deficits.
A patient is asking you about the safety of GBCAs during pregnancy. Which of the following statements is most appropriate?
GBCAs are known to enter fetal circulation and to persist within the amniotic fluid, therefore they must never be used in pregnant patients. I will speak to the referring clinician about alternative diagnostic testing.
Although no adverse effects to the fetus or neonate have been established, GBCAs are known to enter fetal circulation and to persist within the amniotic fluid. Safety has not been proven but they may be used if potential benefits outweigh risks.
GBCA safety in pregnant patients is well-established, therefore you should proceed with the contrasted-enhanced MRI without any concerns.
Whats steps & personnel are involved in MRI clearance of a unconscious or incapacitated patients?
Unconscious/incapacitated patients cannot be cleared for MRI studies. Alternative diagnostic testing should be performed.
Patients are to be assumed MRI compatible unless proven otherwise.
Health Care Proxy, Patient’s Health Care Providers, Physical Exam, & review pre-existing imaging of skull/orbits/chest/abdomen.
You're called to the MRI suite because a patient is coding inside the MRI machine. Which of the following is the best appropriate approach?
Call the on-call Code team to run the code as they are the best trained in CPR/ACLS. Terminate the MRI exam.
Call a code. Terminate the MRI exam. Move the patient to zone 0 while preliminary resuscitation is begun by appropriately trained MRI personnel.
Call a code. Terminate the MRI exam. Move the patient outside of zone IV while preliminary resuscitation is begun by appropriately trained MRI personnel.
Call a code. Terminate the MRI exam. Move the patient outside of zone V while preliminary resuscitation is begun by appropriately trained MRI personnel.
What is your level of confidence in responding to these scenarios?
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