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MRI Physics Final Exam 2024/2025(Questions With 100% Correct Answers)A+ Graded Verified $15.49
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MRI Physics Final Exam 2024/2025(Questions With 100% Correct Answers)A+ Graded Verified
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  • MRI Physics
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  • MRI Physics

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

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  • October 3, 2024
  • 30
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • mri physics final exam questions with 10
  • one advantage of 3d tof mra is answer high
  • one advantage of 2d tof mra is answer large
  • which conventional pulse sequence below provides b

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  • MRI Physics
  • MRI Physics

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MRI Physics Final Exam
2024/2025(Questions With 100% Correct
Answers)A+ Graded 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
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

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

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