mri screening

mr pt care

The general public is limited to a magnetic field of:

A.1 Gauss
 B. 5 Gauss
 C. 10 Gauss
 D. 1 Tesla

 B. 5 Gauss

Image 64 represents __________ labeling.

A. MR unsafe
 B. MR safe
 C. MR compatible
 D. MR conditional

 B. MR safe

A patient with an implant label seen in Image 65 would require:

A. No restrictions on MR imaging approach
 B. Strict manufacturer guidelines be followed (field strength, scan parameters, duration) to ensure patient safety
 C. A different imaging modality be used as the implant is unable to enter the magnetic field
 D. The patient to be placed in an Open MRI only

 C. A different imaging modality be used as the implant is unable to enter the magnetic field

Patients with suspected intra-ocular metallic foreign bodies must be screened for metal prior to entering the MR scan room. This can be accomplished by:

A. Waving a horseshoe magnet over the retina  B. Covering one eye at a time and reading a letter chart from 10 feet distance  C. Taking Xrays of the orbital region and obtaining documented radiologist clearance  D. Wearing lead lined glasses during the procedure

C. Taking Xrays of the orbital region and obtaining documented radiologist clearance

Which of the following should be educated about static magnetic fields and their effects?

A. Anesthesiologists administering conscious sedation  B. Nurses accompanying ICU patients  C. Respiratory therapists maintaining ventilation  D. Housekeeping department that cleans the scan room  E. All of the above

 E. All of the above

Patient screening in the MR environment should occur ________.

A. When the patient fills out most of the questionnaire  B. For most patients  C. More than once, by trained professional(s)  D. For adults only

 C. More than once, by trained professional(s)

Which of the following is exempt from basic MR screening procedures?

A. Radiologists  B. Patient  C. Family member/visitor  D. Housekeeping staff  E. Nursing staff  F. None of the above

 F. None of the above

A patient with an implant label seen in Image 64 would require:

A. No restrictions on MR imaging approach
 B. Strict manufacturer guidelines be followed (field strength, scan parameters, duration) to ensure patient safety
 C. A different imaging modality be used as the implant is unable to enter the magnetic field
 D. The patient to be placed in an Open MRI only

A. No restrictions on MR imaging approach

Image 63 represents ____________ labeling.

A. MR unsafe
 B. MR safe
 C. MR compatible
 D. MR conditional

A. MR unsafe

What is the objective to screening the patient before an MRI exam?

A. Obtain pertinent medical history  B. Rule out potentially hazardous metallic materials in/on the patient  C. Prepare the patient for the procedure/reduce anxiety  D. All of the above

 D. All of the above

_____________ is the most important aspect of providing a safe MR environment.

A. Education  B. Shielding  C. Shimming  D. Screening

 A. Education

Patients with tattooed eyeliner or other ferrous pigment eye region cosmetics should be advised of what possible complication during the MR exam?

A. Temporary discoloration of the eyeliner/makeup  B. Permanent dislodgement of the tattooed area  C. Temporary skin irritation or swelling of the eyes or surrounding tissues  D. Temporary discoloration of eye pigment irregardless of the presence of contact lenses

 C. Temporary skin irritation or swelling of the eyes or surrounding tissues

Image 65 represents ______________ labeling.

A. MR unsafe
 B. MR safe
 C. MR compatible
 D. MR conditional

 A. MR unsafe

When moving blood enters a magnetic field, an effect on the ECG seen as a "T wave swelling" or spike occurs, also known as:

A. Hypertensive effect  B. Magnetohydrodynamic effect  C. Dynamothoracic effect  D. Dynamometer

 B. Magnetohydrodynamic effect

Before being granted entry into an MRI environment, a patient should be screened for:

A. Pregnancy  B. Surgical implants  C. Trauma or injury  D. History of working with metal  E. All of the above

 E. All of the above

Visitors and site employees entering the MR scan room with the patient ____________.

A. MUST be shielded with lead aprons while the magnet is scanning  B. do not have to be screened for metal as they are not being scanned  C. can bring cellular and portable listening devices in the room  D. should be carefully screened for metal in the same manner as the patient

D. should be carefully screened for metal in the same manner as the patient

The effects of time varying magnetic fields can include all of the following EXCEPT:

A. Peripheral nerve stimulation  B. Magnetophosphenes  C. Acoustic damage and/or hearing loss  D. Warmth and/or increase in body temperature

 D. Warmth and/or increase in body temperature

A patient with an implant label seen in Image 63 would require:

. No restrictions on MR imaging approach
 B. Strict manufacturer guidelines be followed (field strength, scan parameters, duration) to ensure patient safety
 C. A different imaging modality be used as the implant is unable to enter the magnetic field
 D. The patient to be placed in an Open MRI only

 B. Strict manufacturer guidelines be followed (field strength, scan parameters, duration) to ensure patient safety

Patients in need of MRI IV gadolinium contrast should first have their glomerular filtration rate (GFR) checked if they:

A. Have a history of renal disease  B. Have a history of diabetes  C. Are over the age of 60  D. All of the above

 D. All of the above

Which of the following implants would be considered acceptable for an MRI scan at 1.5Tesla?

A. Swan Ganz catheters  B. Neurostimulators  C. Non MR conditional cardiac pacemakers  D. Heart valves  E. Ferrous cerebral aneurysm clips

 D. Heart valves