MRI PHYSICS FINAL EXAM WITH
COMPLETE SOLUTIONS
A T1 weighted spin echo image is produced by using a pulse sequence with ________ TE time
and a ______ TR time. Correct Ans-short, short
A T2 weighted spin echo image is produced by using a pulse sequence with ______ TE time and
a _______ TR time. Correct Ans-long, long
A proton density weighted spin echo image is produced by using a pulse sequence with ______
TE time and a _______ TR time. Correct Ans-short, long
The pulse sequence most often used to nullify the signal from adipose tissue is Correct Ans-
STIR
The fastest MRI pulse sequence is Correct Ans-echo planner
Name all the ways you can improve the SNR for a spin echo image. Correct Ans-Thick slice
More NEX
Greater magnet strength
Larger pixel size
, The 180 degree-90 degree- 180 degree RF pulse sequence is employed in Correct Ans-
inversion recovery
The reconstruction technique used for most MRI image is Correct Ans-2DFT
As the magnetic field strength increases, the ____________ parameter also increases Correct
Ans-T1
The scan time for a spin echo pulse sequence depends on all of the following: Correct Ans-
NEX
TR
# of phase encodings
Use of Fourier symmetry
The spatial resolution in body MRI images is about Correct Ans-0.7 LP/mm
In MRI, ______ gradient is on when the RF is applied Correct Ans-slice selection gradient
_______________ MRI artifacts are repeated low- intensity images in the phase-encoding
direction Correct Ans-Motion ghost
_____________ MRI artifacts cause images wrap around to the opposite side and overlap other
parts of the anatomy. Correct Ans-Aliasing
COMPLETE SOLUTIONS
A T1 weighted spin echo image is produced by using a pulse sequence with ________ TE time
and a ______ TR time. Correct Ans-short, short
A T2 weighted spin echo image is produced by using a pulse sequence with ______ TE time and
a _______ TR time. Correct Ans-long, long
A proton density weighted spin echo image is produced by using a pulse sequence with ______
TE time and a _______ TR time. Correct Ans-short, long
The pulse sequence most often used to nullify the signal from adipose tissue is Correct Ans-
STIR
The fastest MRI pulse sequence is Correct Ans-echo planner
Name all the ways you can improve the SNR for a spin echo image. Correct Ans-Thick slice
More NEX
Greater magnet strength
Larger pixel size
, The 180 degree-90 degree- 180 degree RF pulse sequence is employed in Correct Ans-
inversion recovery
The reconstruction technique used for most MRI image is Correct Ans-2DFT
As the magnetic field strength increases, the ____________ parameter also increases Correct
Ans-T1
The scan time for a spin echo pulse sequence depends on all of the following: Correct Ans-
NEX
TR
# of phase encodings
Use of Fourier symmetry
The spatial resolution in body MRI images is about Correct Ans-0.7 LP/mm
In MRI, ______ gradient is on when the RF is applied Correct Ans-slice selection gradient
_______________ MRI artifacts are repeated low- intensity images in the phase-encoding
direction Correct Ans-Motion ghost
_____________ MRI artifacts cause images wrap around to the opposite side and overlap other
parts of the anatomy. Correct Ans-Aliasing
