©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
MRI Physics Final Exam Questions With
Correct Answers 100% Verified.
All the following are artifacts in MRI except - Answer✔beam hardening
_____ is defined as the strength of the gradient over distance - Answer✔slew rate
.5T is equal to _____ Gauss. - Answer✔5,000
A FLAIR inversion sequence is utilized to null - Answer✔CSF
A STIR inversion sequence is utilized to null - Answer✔fat
a double echo, spin echo pulse sequence normally results in ____ - Answer✔T2 and proton
density weighted
an inversion recovery is a pulse sequence that begins with a ____ degree inverting pulse -
Answer✔180
a second (or additional) spin or wobble of the magnetic moment is defined as_____ -
Answer✔precession
hydrogen precesses at approximately ______ MHz/T in a .5T MRI unit - Answer✔21
the time taken to rephase after the application of the 180 degree RF equals the time to dephase
when the - Answer✔TAU
______ reflects the relationship balance between spin up and spin down nuclei. - Answer✔net
magnetification vector
"active" shielding work to ____ , while passive shielding work to _____ - Answer✔shrink the
magnetic field, contain the magnetic field
to "null" a signal is to _____ a signal - Answer✔reduce
data points in k-space are converted to frequency amplitude in the frequency domain by a
process called - Answer✔fast fourier transfer
which of the following is incorrect? - Answer✔data acquired in the central lines of k-space
contribute to resolution, while data acquired in the outer lines contribute to
_____ extrapolates right side data and places it on the left side - Answer✔partial echo imaging
1|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
for which of the following is it crucial to have a TR that is shorter than the T1 and T2 times of
the tissue - Answer✔steady state
homogeneity is measured in: - Answer✔ppm
how does increasing the sampling time affect the minimum TE time? - Answer✔increase
If i want to increase image resolution, I would _____ slice thickness - Answer✔decrease
if only a single RF pulse were applied, what flip angle would produce the optimal signal return? -
Answer✔90
if the gyromagnetic ratio of a substance is 2Mhz/ tesla and the magnetic field strength is 10
Telsa, then the - Answer✔20 Mhz
if the matrix is increased, what happens to SNR? - Answer✔decrease
if we increase the NEX from 1 to 4, our scan time will _____ - Answer✔increase by a factor of 4
if you decrease receive bandwidth, you _____ SNR - Answer✔increase
if you increase matrix, you increase resolution and ____ scan time - Answer✔increase
if you increase the matrix size and keep the FOV the same, the pixel size will: -
Answer✔decrease
in a pulse sequence utilizing 2 echoes, the first image is typically a ____ image, while the second
is a - Answer✔proton density
in a time of flight sequence, the tissue is hypointense relative to the flowing blood because of: -
Answer✔saturation effects
in fast spin echo weighting, the _____ encoding slopes are centered on the effective TE selected.
- Answer✔shallow
what is the unit of measurement for the strength of the gradient magnetic field? - Answer✔mT/m
it is recommended that that the general public those persons who have not been properly
screened for the effect - Answer✔25G
matter unaffected by a magnetic field is termed: - Answer✔diamagnetic
_____ define items that have been demonstrated to pose no known hazards in a specific MRI
enviornment - Answer✔MRI conditional
time-vary magnetic fields, caused by switching the gradients on and off can cause all of the
following effects - Answer✔coma
which of the following is NOT a potential biological effect that could occur in a static magnetic
field above 2.0 - Answer✔increased touch sensitivity
2|Page
MRI Physics Final Exam Questions With
Correct Answers 100% Verified.
All the following are artifacts in MRI except - Answer✔beam hardening
_____ is defined as the strength of the gradient over distance - Answer✔slew rate
.5T is equal to _____ Gauss. - Answer✔5,000
A FLAIR inversion sequence is utilized to null - Answer✔CSF
A STIR inversion sequence is utilized to null - Answer✔fat
a double echo, spin echo pulse sequence normally results in ____ - Answer✔T2 and proton
density weighted
an inversion recovery is a pulse sequence that begins with a ____ degree inverting pulse -
Answer✔180
a second (or additional) spin or wobble of the magnetic moment is defined as_____ -
Answer✔precession
hydrogen precesses at approximately ______ MHz/T in a .5T MRI unit - Answer✔21
the time taken to rephase after the application of the 180 degree RF equals the time to dephase
when the - Answer✔TAU
______ reflects the relationship balance between spin up and spin down nuclei. - Answer✔net
magnetification vector
"active" shielding work to ____ , while passive shielding work to _____ - Answer✔shrink the
magnetic field, contain the magnetic field
to "null" a signal is to _____ a signal - Answer✔reduce
data points in k-space are converted to frequency amplitude in the frequency domain by a
process called - Answer✔fast fourier transfer
which of the following is incorrect? - Answer✔data acquired in the central lines of k-space
contribute to resolution, while data acquired in the outer lines contribute to
_____ extrapolates right side data and places it on the left side - Answer✔partial echo imaging
1|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
for which of the following is it crucial to have a TR that is shorter than the T1 and T2 times of
the tissue - Answer✔steady state
homogeneity is measured in: - Answer✔ppm
how does increasing the sampling time affect the minimum TE time? - Answer✔increase
If i want to increase image resolution, I would _____ slice thickness - Answer✔decrease
if only a single RF pulse were applied, what flip angle would produce the optimal signal return? -
Answer✔90
if the gyromagnetic ratio of a substance is 2Mhz/ tesla and the magnetic field strength is 10
Telsa, then the - Answer✔20 Mhz
if the matrix is increased, what happens to SNR? - Answer✔decrease
if we increase the NEX from 1 to 4, our scan time will _____ - Answer✔increase by a factor of 4
if you decrease receive bandwidth, you _____ SNR - Answer✔increase
if you increase matrix, you increase resolution and ____ scan time - Answer✔increase
if you increase the matrix size and keep the FOV the same, the pixel size will: -
Answer✔decrease
in a pulse sequence utilizing 2 echoes, the first image is typically a ____ image, while the second
is a - Answer✔proton density
in a time of flight sequence, the tissue is hypointense relative to the flowing blood because of: -
Answer✔saturation effects
in fast spin echo weighting, the _____ encoding slopes are centered on the effective TE selected.
- Answer✔shallow
what is the unit of measurement for the strength of the gradient magnetic field? - Answer✔mT/m
it is recommended that that the general public those persons who have not been properly
screened for the effect - Answer✔25G
matter unaffected by a magnetic field is termed: - Answer✔diamagnetic
_____ define items that have been demonstrated to pose no known hazards in a specific MRI
enviornment - Answer✔MRI conditional
time-vary magnetic fields, caused by switching the gradients on and off can cause all of the
following effects - Answer✔coma
which of the following is NOT a potential biological effect that could occur in a static magnetic
field above 2.0 - Answer✔increased touch sensitivity
2|Page
