1
MRI
MRI-ARRT STUDY GUIDE EXAM QUESTIONS
AND ANSWERS UPDATED (2024/2025)
(VERIFIED ANSWERS)
1. The H protons that are left over and parallel to B sub zero after
equilibrium has been established - ANS ✓Net magnetization
2. What year was the first MRI enhancement agent approved for clinical
use? - ANS ✓A) 1988
3. Types of gadolinium used are - ANS ✓D) all of the above.
4. The difference in signal intensity between two adjacent structures is -
ANS ✓CNR
5. Cryogen levels should never fall below - ANS ✓50%
6. The maximum exposure of the head and trunk to the main magnetic
field is - ANS ✓3T
MRI-ARRT
, 2
MRI
7. Of the following size molecules, which one will precess closer to the
Larmor (resonance) frequency when placed within a large static
magnetic field? - ANS ✓B) medium ( fat)
8. Different tissues that have signals that appear similar on an MR
image are described as: - ANS ✓Isointense
9. In a large main magnetic field such as those employed in MRI, the
motion of a hydrogen proton has been described as wobbling like a
spinning top. This motion is called: - ANS ✓Precession
10. Magnetic Resonance Imaging is derived from the process
known as: - ANS ✓Nuclear magnetic resonance
11. Once the net magnetization vector (NMV) has moved away from
equilibrium, the following will occur: - ANS ✓The transverse
component will increase
12. In MRI, substances respond to a specific radio frequency which
is known as: - ANS ✓Resonance frequency
13. The introduction of gadolinium based contrast enhancement
agents by intravenous injection can involve passing through an
MRI-ARRT
, 3
MRI
abnormal brain barrier. The tissue compartments involved are the: -
ANS ✓Intravascular to interstitial
14. T2 is the measurement of time for the transverse component of
net magnetization vector to decrease what percentage of its
maximum value after the application of a 90 degree radio-frequency
pulse - ANS ✓37%
15. In the USA, the MRI system's main magnetic field and the vector
that represents it is symbolized: - ANS ✓B0
16. The resonance frequency of any substance in a magnetic field
can be calculated by employing the - ANS ✓Larmor equation
17. Which type of electromagnetic coils are designed to stimulate
and detect an MR signal? - ANS ✓Radio-frequency coils
18. Tissues that are less efficient at spin-spin interactions because
they contain more free water, such as Cerebral Spinal Fluid, should
have: - ANS ✓High T2 values and produce hyperintense signals (High TR
and Bright signal)
MRI-ARRT
, 4
MRI
19. Magnetism can be defined as the ability of certain substances to
attract: - ANS ✓Iron, cobalt, nickel
20. The purpose of magnetic resonance angiography is to image
the: - ANS ✓Blood flow
21. The strength of very large magnetic fields like those employed
in MRI systems, the SI unit most commonly used is: - ANS ✓Tesla
22. The Larmor frequency of hydrogen protons in a 1.5 Tesla
magnetic field is: - ANS ✓63.9 MHz/Tesla
23. In MR imaging, for a chemical substance to be affected by the
main magnetic field and the radio-wave it must contain an: - ANS
✓Odd number of total protons and neutrons (odd protons magnetic
moment)
24. A 1.5 Tesla magnetic field is equal to: - ANS ✓15,000 gauss
25. The components of Gyro-magnetic ratio are: - ANS ✓Magnetic
moment to angular momentum
MRI-ARRT
MRI
MRI-ARRT STUDY GUIDE EXAM QUESTIONS
AND ANSWERS UPDATED (2024/2025)
(VERIFIED ANSWERS)
1. The H protons that are left over and parallel to B sub zero after
equilibrium has been established - ANS ✓Net magnetization
2. What year was the first MRI enhancement agent approved for clinical
use? - ANS ✓A) 1988
3. Types of gadolinium used are - ANS ✓D) all of the above.
4. The difference in signal intensity between two adjacent structures is -
ANS ✓CNR
5. Cryogen levels should never fall below - ANS ✓50%
6. The maximum exposure of the head and trunk to the main magnetic
field is - ANS ✓3T
MRI-ARRT
, 2
MRI
7. Of the following size molecules, which one will precess closer to the
Larmor (resonance) frequency when placed within a large static
magnetic field? - ANS ✓B) medium ( fat)
8. Different tissues that have signals that appear similar on an MR
image are described as: - ANS ✓Isointense
9. In a large main magnetic field such as those employed in MRI, the
motion of a hydrogen proton has been described as wobbling like a
spinning top. This motion is called: - ANS ✓Precession
10. Magnetic Resonance Imaging is derived from the process
known as: - ANS ✓Nuclear magnetic resonance
11. Once the net magnetization vector (NMV) has moved away from
equilibrium, the following will occur: - ANS ✓The transverse
component will increase
12. In MRI, substances respond to a specific radio frequency which
is known as: - ANS ✓Resonance frequency
13. The introduction of gadolinium based contrast enhancement
agents by intravenous injection can involve passing through an
MRI-ARRT
, 3
MRI
abnormal brain barrier. The tissue compartments involved are the: -
ANS ✓Intravascular to interstitial
14. T2 is the measurement of time for the transverse component of
net magnetization vector to decrease what percentage of its
maximum value after the application of a 90 degree radio-frequency
pulse - ANS ✓37%
15. In the USA, the MRI system's main magnetic field and the vector
that represents it is symbolized: - ANS ✓B0
16. The resonance frequency of any substance in a magnetic field
can be calculated by employing the - ANS ✓Larmor equation
17. Which type of electromagnetic coils are designed to stimulate
and detect an MR signal? - ANS ✓Radio-frequency coils
18. Tissues that are less efficient at spin-spin interactions because
they contain more free water, such as Cerebral Spinal Fluid, should
have: - ANS ✓High T2 values and produce hyperintense signals (High TR
and Bright signal)
MRI-ARRT
, 4
MRI
19. Magnetism can be defined as the ability of certain substances to
attract: - ANS ✓Iron, cobalt, nickel
20. The purpose of magnetic resonance angiography is to image
the: - ANS ✓Blood flow
21. The strength of very large magnetic fields like those employed
in MRI systems, the SI unit most commonly used is: - ANS ✓Tesla
22. The Larmor frequency of hydrogen protons in a 1.5 Tesla
magnetic field is: - ANS ✓63.9 MHz/Tesla
23. In MR imaging, for a chemical substance to be affected by the
main magnetic field and the radio-wave it must contain an: - ANS
✓Odd number of total protons and neutrons (odd protons magnetic
moment)
24. A 1.5 Tesla magnetic field is equal to: - ANS ✓15,000 gauss
25. The components of Gyro-magnetic ratio are: - ANS ✓Magnetic
moment to angular momentum
MRI-ARRT
