MRSO Mock Test 1

MRSO Mock Test 1

Which of the following describes when a non-ferrous, electrically conductive object is repulsed by a static magnetic field?

• Fourier Transfomation
• Larmor equation
• Lenz force
• Ohms law

What is the purpose of resonance?

• Resonance is not used in MRI
• To tilt the nuclei of interest away from B0
• To slow down the processional frequency or nuclei
• To align nuclei with B0

Induction of electrical current in our patient from changing magnetic fields can be described by which of the following?

• Ohms Law
• Faradays Law
• Fourier equation
• Larmor equation

The near field effects of the RF energy can cause what kind of issue?

• Proximity Burning
• Resonant burning
• Reflective burning
• Missile effect

Which of the following is true of a crime in legal cases?

• It involves damages to a person or a persons property
• It involves damages to themselves
• If involves breaking a law
• It involves an unintentional event that involves an emotional stress to another person

What are the patient limits for the time varying gradient coils?

• 10 T/s
• 35 T/s

• To the comfort of the patient
• To the point a patient has a seizure

An Ice pack is used as what to reduce heating in a patient is called what?

• Heat sink
• Insulation
• Non ferrous material
• Anti conductor

The gradient coils are responsible for which of the following? Select all that apply.

• Significant heating
• Magnetohydrodynamic effect
• Noise
• Rotational force
• Translational force
• Peripheral nerve stimulation

What is the name for the direction of the vector of the static magnetic field?

• B0
• B1
• Inverse field
• Equilibrium

The MRI unit is found in which of the following?

• Zone 2
• Zone 4
• Zone 3
• Zone 1

What is hypothermia?

• When the blood pressure decreases dramatically
• When the body temperature gets dangerously warm
• When the body temps get dangerously cold
• When the blood pressure increases dramatically

Where will peripheral nerve stimulation be the strongest?

• Isocenter
• Outside the gantry near the 5 gauss line
• Further away from isocenter in the gantry
• At the level of the table when its advanced

Which of the following are considerations for a quench vent pathway?

• All of the choices
• Restrict access to quench vent area
• Use signage to indicate quench vent outside
• Have a quench vent inspected on a consistent basis

Nephrogenic Systemic Fibrosis is caused by what?

• When a gadolinium ion breaks free from the ligand and remains in the body.
• When the patient is allergic to gadolinium contrast media
• When the gadolinium ion is excreted from the body quickly
• When the gadolinium ion is excreted by the liver

Which of the following is true of a tort in a legal case?

• It involves damages to themselves
• It involves an unintentional event that involves an emotional stress to another person
• It involves damages to a person or a person’s property
• It involves breaking a law

What type of MRI unit uses a cryogen?

• Permanent
• All of the choices
• Superconducting
• Resistive

Which of the following describes the total dose of energy that a tissue receives during an entire exam?

• Overall concentration dose
• Specific Energy dose
• Total voltage absorbed
• Specific Absorption Rate

Which of the following is an ASTM MR labeling option for an object in the MR environment?

• MR compatible
• MR safe
• MR conditional
• MR unsafe

An area that is outside of any MR area and is accessible to the general public is called what?

• Zone 2
• Zone 4
• Zone 1
• Zone 3

The speed that the gradient coils can turn on and off is called what?

• Maximum gradient peak
• Spatial gradient
• The slew rate
• The rise time

The FDA limits SAR in the head to what?

• 3.2 W/kg for 10 min
• 4 W/kg for 15 min
• 8 W/kg for 20 min
• 10 W/kg for 15 min

The B1 field is found where?

• 180 degrees to the B0
• In the same direction as the B0
• Varies from scan to scan
• 90 degrees to the B0

Emesis after a contrast reaction is considered what?

• An allergic reaction to contrast media
• A non- allergic reaction to contrast media
• None of the choices
• Anaphylaxis

Which of the following require the minimal MR safety training?

• Level 2 MR personnel
• Level 1 MR personnel
• The patient
• Non MR personnel

Anthrogenic gadolinium can be described as what?

• The influence of gadolinium on patients with renal insufficiency
• When the accumulation of gadolinium occurs in the body
• When gadolinium is found in the water supply
• When the retention of gadolinium in specific tissues is present