©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
Mri physics Final Exam Questions With
Correct Answers 100% Verified.
One advantage of 3D TOF-MRA is - Answer✔high resolution for small vessels
one advantage of 2D TOF-MRA is - Answer✔larger coverage area
which conventional pulse sequence below provides black blood images - Answer✔-spin Echo
-fast spin Echo
-inversion recovery
-all of the above
MRI imaging techniques include - Answer✔time of flight
phase-contrast
contrast-enhanced
all of the above
the available Imaging time when using cardiac gating is defined as - Answer✔available Imaging
time =
R to R interval - ( trigger window +trigger delay )
to improve coverage in 3D TOF-MRA and at the same time maintain signal from blood flowing
within the larger volume, a hybrid technique is used it is called - Answer✔multiple overlapping
thin section angiography
off resonance RF pulses applied to suppress the signals from macromolecules is called -
Answer✔magnetization transfer contrast
what is the approximate delay in milliseconds using peripheral gating versus using ECG gating -
Answer✔250 ms
which pulse sequence below would you want to use a pre saturation band when Imaging
vasculature - Answer✔conventional spin Echo
fast spin Echo
inversion recovery pulse sequence
1|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
all of the above
in TOF imaging what is applied above or below the image slices to saturate in flowing spins -
Answer✔saturation pulse
which answer below will produce the longest effective TR when cardiac gating - Answer✔3 R to
R selected effective TR
In PC-MRA, this technique relies on different velocity induced phase shifts - Answer✔velocity
encoding
an advantage to 2D TOF-MRA is - Answer✔sensitive to slow flow
MIP stands for - Answer✔maximum intensity projection
a disadvantage to TOF-MRA is - Answer✔saturation of in plane flow
an advantage to PC-MRA is - Answer✔increased background suppression
a disadvantage to PC-MRA is - Answer✔long scan times in 3D
the trigger window is usually expressed as a percentage of the - Answer✔R to R interval
the most important safety factor in cardiac gating is - Answer✔Leads and cables should not be
placed crossing or touching the patient's skin
which of the following best described pseudo gating - Answer✔TR that matches the R to R
interval
this method uses to reduce mis-mapping produces by the heart motion - Answer✔cardiac gating
in cardiac gating, the waiting period before each R-wave is often called - Answer✔trigger
window
what is the name of the waiting period following the R-wave called - Answer✔trigger delay
what is the delay time of cardiac pulse when using peripheral gating - Answer✔250 ms
pseudo gating means taking a patient's pulse before the exam and calculating the R to R interval
and selecting the appropriate TR - Answer✔true
black blood Imaging relies on - Answer✔flow related enhancement
when applying your slices for a 3D pulse sequence to image the carotid arteries which directions
do you require the slices in - Answer✔head to foot direction
what would be the effective TR be of someone with a heart rate of 60 beats per minute -
Answer✔effective TR = 1000 ms
if a patient's heart rate increases while performing a scan using cardiac gating, the R to R interval
will do what in milliseconds - Answer✔will decrease
2|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
during cardiac gating, image acquisition Falls between the R to R interval and is acquired in the
same way as in conventional Imaging - Answer✔true
one of the disadvantages of 3D TOF imaging is saturation of in plane flow - Answer✔true
one advantage of 3D TOF imaging is larger area of coverage - Answer✔false
what is the delay time called after the peak of the R-wave - Answer✔delay after trigger
if a patient's heart rate slows down while performing a scan using cardiac gating, what happens
to the trigger window in milliseconds - Answer✔it increases
what type of flow can be compensated for in MRI - Answer✔laminar flow
which answer below is another remedy for eliminated unwanted background signal when
performing tof MRA - Answer✔magnetization transfer contrast
In an inversion recovery sequence, the order of pulses is which of the following: - Answer✔180°
RF, 90° RF, 180°
In a conventional spin echo sequence, the order of pulses is which of the following: -
Answer✔90° RF, 180° RF, echo
At each 180° pulse in a turbo spin echo sequence, a different amplitude of the phase encoding
gradient is applied to fill out a different line of K space - Answer✔True
In a turbo spin echo sequence, the TE that determines the weighting of the image is called -
Answer✔Effective TE
In STIR imaging, the signal from the following is nulled - Answer✔Fat
Double IR prep begins with the two 180° RF pulses - Answer✔True
In FLAIR the signal from the following is nulled - Answer✔CSF
Gradient echo pulse sequences always use a 20° RF pulse at the beginning - Answer✔False
In gradient echo pulse sequences, you use a 180° RF pulse to rephase the spins - Answer✔False
In gradient echo pulse sequences, this gradient is used to rephase the FID - Answer✔Frequency
encoding gradient
In gradient echo pulse sequences, the TR is much shorter than a spin echo sequence. -
Answer✔True
In stead state free precession (SSFP) imaging, there is a residual transverse magnetization used
to create the image. - Answer✔True
In which of the following pulse sequence do we use a spoiler gradient? - Answer✔Incoherent
gradient
3|Page
Mri physics Final Exam Questions With
Correct Answers 100% Verified.
One advantage of 3D TOF-MRA is - Answer✔high resolution for small vessels
one advantage of 2D TOF-MRA is - Answer✔larger coverage area
which conventional pulse sequence below provides black blood images - Answer✔-spin Echo
-fast spin Echo
-inversion recovery
-all of the above
MRI imaging techniques include - Answer✔time of flight
phase-contrast
contrast-enhanced
all of the above
the available Imaging time when using cardiac gating is defined as - Answer✔available Imaging
time =
R to R interval - ( trigger window +trigger delay )
to improve coverage in 3D TOF-MRA and at the same time maintain signal from blood flowing
within the larger volume, a hybrid technique is used it is called - Answer✔multiple overlapping
thin section angiography
off resonance RF pulses applied to suppress the signals from macromolecules is called -
Answer✔magnetization transfer contrast
what is the approximate delay in milliseconds using peripheral gating versus using ECG gating -
Answer✔250 ms
which pulse sequence below would you want to use a pre saturation band when Imaging
vasculature - Answer✔conventional spin Echo
fast spin Echo
inversion recovery pulse sequence
1|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
all of the above
in TOF imaging what is applied above or below the image slices to saturate in flowing spins -
Answer✔saturation pulse
which answer below will produce the longest effective TR when cardiac gating - Answer✔3 R to
R selected effective TR
In PC-MRA, this technique relies on different velocity induced phase shifts - Answer✔velocity
encoding
an advantage to 2D TOF-MRA is - Answer✔sensitive to slow flow
MIP stands for - Answer✔maximum intensity projection
a disadvantage to TOF-MRA is - Answer✔saturation of in plane flow
an advantage to PC-MRA is - Answer✔increased background suppression
a disadvantage to PC-MRA is - Answer✔long scan times in 3D
the trigger window is usually expressed as a percentage of the - Answer✔R to R interval
the most important safety factor in cardiac gating is - Answer✔Leads and cables should not be
placed crossing or touching the patient's skin
which of the following best described pseudo gating - Answer✔TR that matches the R to R
interval
this method uses to reduce mis-mapping produces by the heart motion - Answer✔cardiac gating
in cardiac gating, the waiting period before each R-wave is often called - Answer✔trigger
window
what is the name of the waiting period following the R-wave called - Answer✔trigger delay
what is the delay time of cardiac pulse when using peripheral gating - Answer✔250 ms
pseudo gating means taking a patient's pulse before the exam and calculating the R to R interval
and selecting the appropriate TR - Answer✔true
black blood Imaging relies on - Answer✔flow related enhancement
when applying your slices for a 3D pulse sequence to image the carotid arteries which directions
do you require the slices in - Answer✔head to foot direction
what would be the effective TR be of someone with a heart rate of 60 beats per minute -
Answer✔effective TR = 1000 ms
if a patient's heart rate increases while performing a scan using cardiac gating, the R to R interval
will do what in milliseconds - Answer✔will decrease
2|Page
, ©JASONMcCONNELL 2024/2025 ALL RIGHTS RESERVED 1/28/2025.
during cardiac gating, image acquisition Falls between the R to R interval and is acquired in the
same way as in conventional Imaging - Answer✔true
one of the disadvantages of 3D TOF imaging is saturation of in plane flow - Answer✔true
one advantage of 3D TOF imaging is larger area of coverage - Answer✔false
what is the delay time called after the peak of the R-wave - Answer✔delay after trigger
if a patient's heart rate slows down while performing a scan using cardiac gating, what happens
to the trigger window in milliseconds - Answer✔it increases
what type of flow can be compensated for in MRI - Answer✔laminar flow
which answer below is another remedy for eliminated unwanted background signal when
performing tof MRA - Answer✔magnetization transfer contrast
In an inversion recovery sequence, the order of pulses is which of the following: - Answer✔180°
RF, 90° RF, 180°
In a conventional spin echo sequence, the order of pulses is which of the following: -
Answer✔90° RF, 180° RF, echo
At each 180° pulse in a turbo spin echo sequence, a different amplitude of the phase encoding
gradient is applied to fill out a different line of K space - Answer✔True
In a turbo spin echo sequence, the TE that determines the weighting of the image is called -
Answer✔Effective TE
In STIR imaging, the signal from the following is nulled - Answer✔Fat
Double IR prep begins with the two 180° RF pulses - Answer✔True
In FLAIR the signal from the following is nulled - Answer✔CSF
Gradient echo pulse sequences always use a 20° RF pulse at the beginning - Answer✔False
In gradient echo pulse sequences, you use a 180° RF pulse to rephase the spins - Answer✔False
In gradient echo pulse sequences, this gradient is used to rephase the FID - Answer✔Frequency
encoding gradient
In gradient echo pulse sequences, the TR is much shorter than a spin echo sequence. -
Answer✔True
In stead state free precession (SSFP) imaging, there is a residual transverse magnetization used
to create the image. - Answer✔True
In which of the following pulse sequence do we use a spoiler gradient? - Answer✔Incoherent
gradient
3|Page
