ADVANCED PULSE SEQUENCES AND ECHO FORMATION QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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Course
GXMO
Institution
GXMO
ADVANCED PULSE SEQUENCES AND ECHO FORMATION QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
Which of the following can be achieved by using gradient-echo pulse sequences? - ANSWER Improve temporal resolution
The inversion recovery pulse sequence that is used to suppress CSF in proton density and T2-w...
ADVANCED PULSE SEQUENCES AND ECHO
FORMATION QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
Which of the following can be achieved by using gradient-echo pulse sequences? - ANSWER Improve
temporal resolution
The inversion recovery pulse sequence that is used to suppress CSF in proton density and T2-weighted
images is known as what? - ANSWER FLAIR
Balance gradient echo is utilized to reduce the effects of: - ANSWER Phase Dephasing
Dixon technique can be used to produce ____________ images.
A. Out phase imaging
B. Water suppression
C. Fat suppression
D. All answers are correct - ANSWER All answers are correct
Which is not a concern with EPI pulse sequences? - ANSWER Increase in body temperature
Chemical saturation is more effective in _ T magnet - ANSWER 3T
Which of the following pulse sequences is the most affected by susceptibility, ghosting, chemical shift
effects? - ANSWER SS-GRE-EPI
Why GRE is the best imaging option to detect hemorrhages? - ANSWER GRE does not use 180 re-phasing
pulses and is more susceptible to hemorrhagic blood
Which of the following is an advantage of gradient echo pulse sequences?
, A. Decreased scan time
B. Increased sensitivity to flow
C. Volume acquisitions possible
D. All answers are correct - ANSWER All answers are correct
Chemical saturation technique is achieved by applying: - ANSWER A 90° RF pulse at the beginning of the
sequence to the tissues being saturated.
In a 1T magnet: What is the chemical shift between fat and water? - ANSWER 147
In which of the following examples, chemical saturation provides better image quality than STIR? -
ANSWER A 16 cm isocenter FOV
During out phase image acquisition, the dark signal intensity projected by the voxels where fat and water
converge is the result of: - ANSWER Chemical miss-registration
What would be the best technique to obtain fat saturation in a patient that has a metallic implanted
device in the FOV area? - ANSWER STIR
IR pulse sequences are characterized by starting the pulse sequence with _____ RF pulse. - ANSWER
180°
Chemical saturation can be used to saturate signal from:
A. Fat
B. Water
C. Silicone
D. All answers are correct - ANSWER All answers are correct
The main concern with EPI pulse sequences is:
1. Peripheral nerve stimulation
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