Exam (elaborations)
MRSO EXAM MARK QUESTIONS AND ANSWERS
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MRSO EXAM MARK QUESTIONS AND ANSWERS
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Name: Score:209 Multiple choice questions
Term 1 of 209
The quench vent in the MR room should be inspected by whom?
MRMD
Facility engineers
MR tech
Manufacture engineers
Term 2 of 209
How much more heating does a 360 degree RF pulse have than a 180 degree RF pulse?
2 times more
Equal heating
3 times more
4 times more
Term 3 of 209
Which of the following describes the total dose of energy that a tissue receives during an
entire exam?
Specific energy dose
Specific absorption equivalent
Overall concentration dose
Total voltage absorbed
,Term 4 of 209
A patient has an insulin pump that is MR conditional. The manufacturer limits the implants to a
spatial gradient of 5 T/m. According to this spatial gradient map, is it safe to scan this patient
who is 6'5" for a foot MRI?
Yes
Any exam would be safe
Have the patient apply pressure to the implant
No
Term 5 of 209
What is the greatest risk to a patient with a brain aneurysm clip while lying at isocenter? The
patient is having a brain MR scan.
Translational force
Heating
Rotational force
Peripheral nerve stimulation
Term 6 of 209
Which of the following is true of a gad contrast media? Select all that apply.
a. Gad has 7 unpaired electrons
b. Gad will shorten T1 relaxation times
c. Gad is paramagnetic
d. Gad demonstrated ferrous properties when placed in a strong static magnetic field.
a, b
a. Place pacing wire outside RF field
a, b, c
d. EPI
,Term 7 of 209
Energy deposition is limited to what in the first level controlled operating mode?
3 degrees Celsius
0.5 degree Celsius
1 degree Celsius
2 degrees Celsius
Term 8 of 209
A patient has shown a maximum heat increase of +0.6 degrees Celsius at 1.5 T & 3.0 T. This
increase is considered safe under the MR standards put in place.
True
False
Term 9 of 209
An object that produces a weakly attractive force in the presence of a strong magnetic field is
called what?
Superparamagnetic
Ferromagnetic
Diamagnetic
Paramagnetic
Term 10 of 209
Which of the following agents yield the best chance for transmetallization to occur?
Macrocyclic non-ionic
Macrocyclic ionic
Linear ionic
Linear non-ionic
, Term 11 of 209
The spatial magnetic gradient has the most influence on which of the following?
Heating
Peripheral nerve stimulation
Noise
Translational force
Term 12 of 209
Which of the following techniques can be used to increase the echo spacing? Select all that
apply.
a. Increase the TR
b. Decrease receiving bandwidth
c. Increase receiving bandwidth
d. Use a receive only coil
e. Increase field of view
f. Increase flip angle
b, e
Decreasing the receiving bandwidth will be lengthening the sample time. This may force
us to increase our TE as well as the TR. Increasing the field of view will also allow for
longer echo spacing.
a. ICNIRP
(International Commission on Non-Ionizing Radiation Protection)
ACR - Safety policies
a. Place pacing wire outside RF field
b. It is hypothesized that gad retention is due to it following pathways that other minerals
such as iron and calcium do
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