MRI Post Test Exam with all Correct & 100% Verified
Answers |Actual Complete Exam| Guaranteed to Pass
When the protons are not exposed to the external magnetic field, they are aligned:
A. Parallel to the external MF
B. Anti-parallel to the external MF
C. Perpendicular to the external MF
D. In a random fashion ✔Correct Answer-D. In a random fashion
This is used to calculate the frequency or speed of precession for a specific nucleus in a specific
magnetic field:
A. Gyromagnetic ratio
B. Larmor equation
C. Fourier equation
D. Larmor frequency ✔Correct Answer-B. Larmor equation
3.) MR active nuclei possess a/an:
A. Even number of protons and neutrons
B. Even number of protons
C. Odd number of neutrons
D. Odd number of protons ✔Correct Answer-D. Odd number of protons
4.) An area where raw data is stored:
A. Dewar
B. K-space
C. Computer disk
D. Magnetic tape ✔Correct Answer-B. K-space
5.) It describes the alignment of magnetic moments in opposite direction as the magnetic field:
A. Spin up
B. Parallel
C. Low energy nuclei
D. Spin-down ✔Correct Answer-D. Spin-down
6.) The frequency of precession of hydrogen proton at 1.5 T:
A. 21 MHz
B. 42 MHz
C. 63 MHz
D. 84 MHz ✔Correct Answer-C. 63 MHz
7.) External magnetic field has a symbol of:
A. Bo
B. Mo
C. B1
D. ωo ✔Correct Answer-A. Bo
8.) The population of low energy hydrogen nuclei that align their magnetic moments parallel to
external magnetic field:
A. Randon spin
, B. Anti-parallel
C. Spin up
D. Spin down ✔Correct Answer-C. Spin up
9.) This phenomenon occurs whenever a spinning proton is acted on by the external magnetic field:
A. Resonance
B. Phase coherence
C. Relaxation
D. Precession ✔Correct Answer-D. Precession
10.) If transverse magnetization of the spins (Mxy) of the spins is produced, a transient MRI signal
results, which decays with a characteristic time constant T2. This decaying signal is:
A. SAR
B. PD
C. T2 signal
D. FID ✔Correct Answer-D. FID
11.) Portion of the magnetic field extending away from the confines of the magnet:
A. External MF
B. Gradient MF
C. Fringe MF
D. Internal MF ✔Correct Answer-C. Fringe MF
12.) Gyromagnetic ratio is measured in:
A. MHz/T
B. W/kg
C. ppm
D. T ✔Correct Answer-A. MHz/T
13.) Relaxation time is measured in:
A. Second
B. Minute
C. Millisecond
D. Hours ✔Correct Answer-C. Millisecond
14.) Time-varying magnetic field has a symbol of:
A. Bo
B. Mo
C. B1
D. ωo ✔Correct Answer-C. B1
15.) Resonance is an energy transition that occurs when protons are subjected to a frequency that is:
A. Different of its own
B. Greater than of its own
C. Less than of its own
D. Same of its own ✔Correct Answer-D. Same of its own
16.) Creating an in phase magnetization usually by using an RF pulse or a gradient:
A. Dephasing
B. Phase coherence
Answers |Actual Complete Exam| Guaranteed to Pass
When the protons are not exposed to the external magnetic field, they are aligned:
A. Parallel to the external MF
B. Anti-parallel to the external MF
C. Perpendicular to the external MF
D. In a random fashion ✔Correct Answer-D. In a random fashion
This is used to calculate the frequency or speed of precession for a specific nucleus in a specific
magnetic field:
A. Gyromagnetic ratio
B. Larmor equation
C. Fourier equation
D. Larmor frequency ✔Correct Answer-B. Larmor equation
3.) MR active nuclei possess a/an:
A. Even number of protons and neutrons
B. Even number of protons
C. Odd number of neutrons
D. Odd number of protons ✔Correct Answer-D. Odd number of protons
4.) An area where raw data is stored:
A. Dewar
B. K-space
C. Computer disk
D. Magnetic tape ✔Correct Answer-B. K-space
5.) It describes the alignment of magnetic moments in opposite direction as the magnetic field:
A. Spin up
B. Parallel
C. Low energy nuclei
D. Spin-down ✔Correct Answer-D. Spin-down
6.) The frequency of precession of hydrogen proton at 1.5 T:
A. 21 MHz
B. 42 MHz
C. 63 MHz
D. 84 MHz ✔Correct Answer-C. 63 MHz
7.) External magnetic field has a symbol of:
A. Bo
B. Mo
C. B1
D. ωo ✔Correct Answer-A. Bo
8.) The population of low energy hydrogen nuclei that align their magnetic moments parallel to
external magnetic field:
A. Randon spin
, B. Anti-parallel
C. Spin up
D. Spin down ✔Correct Answer-C. Spin up
9.) This phenomenon occurs whenever a spinning proton is acted on by the external magnetic field:
A. Resonance
B. Phase coherence
C. Relaxation
D. Precession ✔Correct Answer-D. Precession
10.) If transverse magnetization of the spins (Mxy) of the spins is produced, a transient MRI signal
results, which decays with a characteristic time constant T2. This decaying signal is:
A. SAR
B. PD
C. T2 signal
D. FID ✔Correct Answer-D. FID
11.) Portion of the magnetic field extending away from the confines of the magnet:
A. External MF
B. Gradient MF
C. Fringe MF
D. Internal MF ✔Correct Answer-C. Fringe MF
12.) Gyromagnetic ratio is measured in:
A. MHz/T
B. W/kg
C. ppm
D. T ✔Correct Answer-A. MHz/T
13.) Relaxation time is measured in:
A. Second
B. Minute
C. Millisecond
D. Hours ✔Correct Answer-C. Millisecond
14.) Time-varying magnetic field has a symbol of:
A. Bo
B. Mo
C. B1
D. ωo ✔Correct Answer-C. B1
15.) Resonance is an energy transition that occurs when protons are subjected to a frequency that is:
A. Different of its own
B. Greater than of its own
C. Less than of its own
D. Same of its own ✔Correct Answer-D. Same of its own
16.) Creating an in phase magnetization usually by using an RF pulse or a gradient:
A. Dephasing
B. Phase coherence
