MRI Safety 2 Flashcards by Elad Nevo

Special foley catheters with temperature sensors are

a. MRI safe @ 1.5T
b. potential sources for small artifacts
c. contraindicated for MRI
d. a and b

c. contraindicated for MRI

How well did you know this?

Not at all

Perfectly

If a patient says that they have a non ferromagnetic intracranial aneurysm clip, then the proper action is to

a. perform an MRI brain scan
b. perform an MRI non brain scan
c. consult the patient’s personal physician
d. consult the attending radiologist

d. consult the attending radiologist

How well did you know this?

Not at all

Perfectly

The deflection angles found when testing for magnetic field interactions are typically greatest in

a. 1.5 T shore bore MR systems
b. 1.5 T long bore MR systems
c. 3.0 T short bore MR systems
d. 3.0 T long bore MR systems

c. 3.0 T short bore MR systems

How well did you know this?

Not at all

Perfectly

Extremity MRI systems are typically used for assessing what kind of pathology

a. cardiac
b. abdominal
c. musculoskeleltal
d. all of the above

c. musculoskeletal

How well did you know this?

Not at all

Perfectly

A properly tested metallic suture is considered MR safe

a. true
b. false

a. true

How well did you know this?

Not at all

Perfectly

CSF shunt are used to treat

a. hemorrhage
b. hydrocephalus
c. neuralgia
d. all of the above

b. hydrocephalus

How well did you know this?

Not at all

Perfectly

Which MRI hazard would be most substantial for ECG leads

a. magnetic field interaction
b. artifacts
c. a and b
d. none of the above

d. none of the above

How well did you know this?

Not at all

Perfectly

Pillcam is an ____ and is considered MR ____

a. endoscopy device, safe
b. endoscopy device, unsafe
c. neurostimulator, safe
d. neurostimulator, unsafe

b. endoscopy device, unsafe

How well did you know this?

Not at all

Perfectly

Which of the following aneurysm clips are contraindicated for MRI procedures

a. titanium
b. titanium alloy
c. martensitic stainless steel
d. austenitic stainless steel

c. martensitic stainless steel

How well did you know this?

Not at all

Perfectly

The function of which device can be altered by the MR system static magnetic field
I. ICD
II. Pacemaker
III. Medtronic Insulin Pump

a. II only
b. I and II only
c. II and III only
d. I II and III

d. I II and III

How well did you know this?

Not at all

Perfectly

Besides magnetically activated dental implants, other dental implants are not a contraindication for MRI considering their

a. metallic nature
b. non metallic nature
c. negative magnetic interaction
d. positive retentive force

d. positive retentive force

How well did you know this?

Not at all

Perfectly

Which implants and devices require special MRI scrutiny
I. electrically activated
II. magnetically activated
III. mechanically activated

a. I only
b. I and II only
c. II only
d. I II and III

d. I II and III

How well did you know this?

Not at all

Perfectly

A patient with a non ferromagnetic cardiac occluder for PDA ASD and VSD can undergo an MR procedure at any time

a. true
b. false

a. true

How well did you know this?

Not at all

Perfectly

If a device or implant is found to be MR safe at 1.5 T then it will also be MR safe at 3.0 T

a. true
b. false

b. false

How well did you know this?

Not at all

Perfectly

A stent will usually be incorporated securely into a vessel wall due to tissue ingrowth after what time period

a. 6 days
b. 6 weeks
c. 6 months
d. 6 years

b. 6 weeks

How well did you know this?

Not at all

Perfectly

Some breast tissue expanders or implants may produce artifacts because of

a. saline solution
b. silicone
c. stainless steel injection ports
d. all of the above

c. stainless steel injection ports

How well did you know this?

Not at all

Perfectly

Theraseed radioactive implants deliver low level radiation to

a. breast
b. ovaries
c. uterus
d. prostate

d. prostate

How well did you know this?

Not at all

Perfectly

If an MRI patient has a transdermal patch for nitroglycerine, then the proper safety procedure is to

a. remove patch for exam and re-administer patch after exam
b. leave patch as is and perform exam
c. do not perform exam
d. contact physician

d. contact physician

How well did you know this?

Not at all

Perfectly

A trauma patient with a serious neck injury is brought to the MR suite with a cervical fixation device. Can the device enter the MR scan room?

a. yes definitely do not mess with the fixation device
b. no definitely, fixation devices do not enter the MR scan room
c. maybe, depending on the patient’s condition
d. maybe, depending on the type of fixation device

Study These Flashcards

d. maybe, depending on the type of fixation device

can patients enter the MR scan room if they have ferromagnetic implants

a. always
b. usually
c. sometimes
d. never

Study These Flashcards

c. sometimes

Broken leads would present a problem for

a. spinal fusion stimulator
b. breast tissue expander
c. penile implant
d. none of the above

Study These Flashcards

a. spinal fusion stimulator

the reveal plus insertable loop recorder records patient ECG traces. the Reveal Loop Insertable Loop Recorder

a. is unaffected by MR procedures
b. is MR unsafe
c. must be interrogated before performing MR procedures
d. must be removed before performing MR procedures

Study These Flashcards

c. must be interrogated before performing MR procedures

the main problem with contraceptive diaphrgms and MR procedures is

a. heating
b. movement
c. artifacts
d. all of the above

Study These Flashcards

c. artifacts

A family member with a defibrillator wishes to accompany a spouse in the MR scan room. the proper action of the technologist concering entrance to the MR scan room for this family member is to

a. allow entrance
b. screen for other contraindications, then possibly allow entrance
c. disallow entrance
d. consult the attending radiologist

Study These Flashcards

c. disallow entrance

Non ferromagnetic oxygen tanks utilized in the MR environment are typically made of a. titanium b. aluminium c. stainless steel d. none metallic alloy

b. aluminium

A parkinson's patient arrives with a neurostimulator. if the usual protocols are observed, can the patient receive an MR exam a. yes b. maybe c. no d. all of the above

c. no

What kind of testing is first performed to determine the safety of metallic implants, devices or materials a. simulations b. in vivo c. ex vivo d. all of the above

b. ex vivo

For clinical MRI, standard cardiac pacemakers are typically contraindicated a. true b. false

a. true

There has never been a patient fatality from an aneurysm clip in the MR environment a. true b. false

b. false

A patient with an electrically conductive cardiovascular catheter is contraindicated for MRI a. true b. false

a. true

A patient with a hearing aid arrives for an MRI exam. can the patient receive the exam a. yes, but keep hearing aid in ear for instructions b. yes, but hearing aid must be removed for scan c. ye , but hearing aid must be removed for scan and ear plug must be worn d. No, even if hearing aid is removed, there could be further hearing damage

c. yes but hearing aid must be removed for scan and ear plugs must be worn

Enterra therapy is used to treat a. hydrocephalus b. sciatica c. cardiac arrhythmia d. gastroparesis

d. gastroparesis

If the device type is known and tested safe which patients may typically undergo MRI exams I. Patients with heart valve replacements II. patients with standard pacemakers III. patients with vascular clips a. I only b. I and III only c. III only d. I II and III

b. I and III only

There is no alteration in the performance of any CSF shunt valve that have been tested to be MRI safe at 1.5 T a. true b. false

b. false

Which substances make the best surgical instruments for MR procedures a. aluminum alloys b. titanium alloys c. stainless steel alloys d. a and b

b. titanium alloys

Which of the following are true statements about programmable infusion pumps I. MRI contraindicated II. Tube in intrathecal space III. Motor stop during MRI exposure a. I and III b. II and III c. III d. I II and III

b. II and III

A patient with a cochlear implant may undergo which MRI procedure a. brain b. knee c. a and b d. none of the above

d. none of he above

May a patient with an ICD undergo an MRI procedure on an extremity MR system a. yes b. no c. maybe d. none of the above

c. maybe

Most injuries in MRI due to the magnetic environment result from a. electric currents b. movement of ferromagnetic object c. RF burns d. acoustic noise

b. movement of ferromagnetic object

Which of the following could be contaminated with ferromagnetic materials I. bullets II. shrapnel III. shotgun pellets a. I only b. II only c. II and III d. I II and III

d. I II and III

Which of the following are considered potentially dangerous body locations for magnetic field interactions I. soft tissue II. vascular III. neural a. I only b. II only c. II and III only d. I II and III

d. I II and III

According to the FDA which kind of device is demonstrated NOT to have significant effect on the diagnostic information from an MRI exam a. MRI Safe b. MRI compatible c. both a and b d. none of the above

b. MR compatible

The guideline for MR scanning of external fixation devices are usually determined on a "case by case" basis. external fixation devices are typically a. magneticaly activated b. electronically activated c. orthopedic d. a and b

c. orthopedic

most sutures are considered to be MR safe at 3.0T a. true b. false

a. true

How many mT is 5 G a. .1 mT b. .5mT c. 5000 T d. 50,000 T

b. .5 mT

Hydrocephalus may be treated by a. CSF shunt b. CSF occluder c. Carotid artery vascular clamp d. none of the above

a. CSF shunt

MRI Safety 2 Flashcards

(46 cards)