MRSO Practice Exam (Latest 2026/2027 Update) With Questions
and Verified Answers| | 100% Correct | Grade A+
•
Peripheral nerve stimulation can be described by which of the following?
•
a. Faraday's law of induction
b. Ohm's law
c. Lenz's law
d. Planks Law
i. - ✔✔b. Faraday's law of induction (describes the induction of electrical current in the
ii. presence of a changing magnetic field).
iii. Lenz's force describes the opposing forces created.
iv. Ohm's law deals with the resistance of current along a wire.
•
Gad contrast has been found in the body in what form? Select all that apply.
a. Water-soluble
b. Non-water soluble
- ✔✔a, b
•
Which of the following would we expect to be the loudest sequence?
a. GRASS
b. Fast spin echo
c. Conventional gradient sequence
d. FLAIR
- ✔✔a. GRASS
•
The FLAIR and fast spin echo are considered spin echo sequences; they do not have extremely fast
changing gradient, so will not produce as much noise.
•
Which of the following has a steeper spatial magnetic gradient?
a. Vertical B0
b. Horizontal B0
- ✔✔a. Vertical B0
•
The strongest gradient strength will reach maximum strength how far from isocenter?
•
a. 5-20 cm
b. 20-40 cm
c. 30-60 cm
d. 5-15 cm
,- ✔✔c. 30-60 cm
•
Which of the following is true of gad and breastfeeding mothers? Select all that apply.
•
a. Gad is found in breast milk in a stable and chelated form
b. It is thought that gad contrast may alter the taste of breastmilk.
c. Available data suggests that breastmilk should be pumped and discarded for 24 hours after the IV
dose
d. 20% of the intravascular dose would be excreted into the breastmilk within the first 24 hours.
i. - ✔✔a,
ii. b
•
Which of the following will influence peripheral nerve stimulation? a. Static magnetic field
b. Magnetic field at isocenter
c. Patient weight
d. Slew rate
- ✔✔d. Slew rate
•
Which of the following pulse sequences would we expect to see the least patient heating?
•
a. Incoherent gradient
b. STIR
c. Fast spin echo
d. EPI
- ✔✔d. EPI
•
A patient comes in with a 1 cm brain aneurysm clip and you find the package which lists what metal it is
made from. Which of the following metals would make it unsafe to scan this patient?
a. Elgiloy
b. Phynox
c. MP35N
d. 405 Stainless steel
- ✔✔d. 405 Stainless steel
•
Phynox, elgiloy, titanium, and 316 stainless steel are non-ferrous.
•
17-7PH and 405 stainless steel are ferrous
, •
Which of the following are true of Lenz's force?
a. Occurs because of the interaction between a ferrous object and the static magnetic field
b. Influences objects that are electrically conductive
c. Influence on an object depends on the field strength
d. Increases with the rate of motion through the static magnetic field.
- ✔✔b, c, d
•
Lenz's law is caused when an electrically conductive object (not ferrous) interacts with a strong
magnetic
field. The speed that the object translates through the magnetic field as well as its dimensions,
orientation, and the overall magnetic field will influence the amount of Lenz's force on an object. This
force acts as a repulsive force when translating through the static magnetic field.
•
A patient is having an MR lumbar spine in normal mode. We know that the SAR will not exceed which
of
the following?
a. 4 W/kg
b. 3 W/kg
c. 2 W/kg
d. 1 W/kg
- ✔✔c. 2 W/kg
•
An MR conditional implant should minimally address which of the following? Select all that apply.
a. Switched gradient magnetic fields
b. Patient position
c. Radiofrequency fields
d. Static magnetic field
- ✔✔a, c, d
•
Where would we expect to see hotspots?
a. Areas in the near field
b. Areas with low dielectric constants
c. Areas under the transmit RF coil
d. All the choices are correct
- ✔✔d. All the choices are correct
•
There is a large number of literature that suggests that patients in sickle cell crisis who receive gad
contrast can develop many complications, even death.
a. True
b. False
- ✔✔b. False
and Verified Answers| | 100% Correct | Grade A+
•
Peripheral nerve stimulation can be described by which of the following?
•
a. Faraday's law of induction
b. Ohm's law
c. Lenz's law
d. Planks Law
i. - ✔✔b. Faraday's law of induction (describes the induction of electrical current in the
ii. presence of a changing magnetic field).
iii. Lenz's force describes the opposing forces created.
iv. Ohm's law deals with the resistance of current along a wire.
•
Gad contrast has been found in the body in what form? Select all that apply.
a. Water-soluble
b. Non-water soluble
- ✔✔a, b
•
Which of the following would we expect to be the loudest sequence?
a. GRASS
b. Fast spin echo
c. Conventional gradient sequence
d. FLAIR
- ✔✔a. GRASS
•
The FLAIR and fast spin echo are considered spin echo sequences; they do not have extremely fast
changing gradient, so will not produce as much noise.
•
Which of the following has a steeper spatial magnetic gradient?
a. Vertical B0
b. Horizontal B0
- ✔✔a. Vertical B0
•
The strongest gradient strength will reach maximum strength how far from isocenter?
•
a. 5-20 cm
b. 20-40 cm
c. 30-60 cm
d. 5-15 cm
,- ✔✔c. 30-60 cm
•
Which of the following is true of gad and breastfeeding mothers? Select all that apply.
•
a. Gad is found in breast milk in a stable and chelated form
b. It is thought that gad contrast may alter the taste of breastmilk.
c. Available data suggests that breastmilk should be pumped and discarded for 24 hours after the IV
dose
d. 20% of the intravascular dose would be excreted into the breastmilk within the first 24 hours.
i. - ✔✔a,
ii. b
•
Which of the following will influence peripheral nerve stimulation? a. Static magnetic field
b. Magnetic field at isocenter
c. Patient weight
d. Slew rate
- ✔✔d. Slew rate
•
Which of the following pulse sequences would we expect to see the least patient heating?
•
a. Incoherent gradient
b. STIR
c. Fast spin echo
d. EPI
- ✔✔d. EPI
•
A patient comes in with a 1 cm brain aneurysm clip and you find the package which lists what metal it is
made from. Which of the following metals would make it unsafe to scan this patient?
a. Elgiloy
b. Phynox
c. MP35N
d. 405 Stainless steel
- ✔✔d. 405 Stainless steel
•
Phynox, elgiloy, titanium, and 316 stainless steel are non-ferrous.
•
17-7PH and 405 stainless steel are ferrous
, •
Which of the following are true of Lenz's force?
a. Occurs because of the interaction between a ferrous object and the static magnetic field
b. Influences objects that are electrically conductive
c. Influence on an object depends on the field strength
d. Increases with the rate of motion through the static magnetic field.
- ✔✔b, c, d
•
Lenz's law is caused when an electrically conductive object (not ferrous) interacts with a strong
magnetic
field. The speed that the object translates through the magnetic field as well as its dimensions,
orientation, and the overall magnetic field will influence the amount of Lenz's force on an object. This
force acts as a repulsive force when translating through the static magnetic field.
•
A patient is having an MR lumbar spine in normal mode. We know that the SAR will not exceed which
of
the following?
a. 4 W/kg
b. 3 W/kg
c. 2 W/kg
d. 1 W/kg
- ✔✔c. 2 W/kg
•
An MR conditional implant should minimally address which of the following? Select all that apply.
a. Switched gradient magnetic fields
b. Patient position
c. Radiofrequency fields
d. Static magnetic field
- ✔✔a, c, d
•
Where would we expect to see hotspots?
a. Areas in the near field
b. Areas with low dielectric constants
c. Areas under the transmit RF coil
d. All the choices are correct
- ✔✔d. All the choices are correct
•
There is a large number of literature that suggests that patients in sickle cell crisis who receive gad
contrast can develop many complications, even death.
a. True
b. False
- ✔✔b. False
