MRI Safety (Post-Test)

Enter your initials + Your PGY Year (ie. Joe Smith PGY3 = JS3)

Maximum field strength which does not pose potential concern for implanted electronic devices?

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

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

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

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

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?

MRI Safety (Post-Test)

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