MRI Quiz- Image Basics/ Image
formation with correct answers 100%
2026
T1 relaxation is also called - Correct Answers spin lattice
T1 regrowth along which axis - Correct Answers longitudinal (z)
what is the percent of recovery for T1 relaxation time - Correct Answers 63% longitudinal
magnetization
T2 relaxation take what type of percent - Correct Answers 37
Describe FAT time as it relates to T1 & T2 relaxation times - Correct Answers short
short
Describe water as it relates to T1 & T2 relaxation times - Correct Answers Long
Long
To obtain low signal, there must be _________________ component of magnetization in the
transverse plane of the coil - Correct Answers a small
To obtain high signal there has to be a _____________ component of magnetization in the
transverse plane of the coil - Correct Answers large
In a T1 weighted image explain the difference between Fat and water
,and what that means in relation ship to the NMV - Correct Answers T1 time fat is shorter than
water
Fat Bright- high signal
Water- dark -low signal
NMV in fat realigns with Bo faster than water
In a T2 weighted image explain the difference between Fat and water
and what that means in relation ship to the NMV - Correct Answers T2 time fat is shorter than
water-- but the magnitude of fat is to small
fat- dark
water- bright
what is the controlling parameter of T1 images - Correct Answers TR
what is the controlling parameter of T2 weighted images - Correct Answers TE
Name 4 things that increasing TR will do - Correct Answers improve SNR
Increase Scan Time
Reduce T1
Increase availabile number of slices
name what Increasing TE will do - Correct Answers Lower SNR
, do you have better SNR with short or long TE - Correct Answers better overall signal with the
shortest TE
What are the TR and TE parameters for T1 weighted images - Correct Answers TR=350-700 ms
TE=10-30 ms
What are the TR and TE parameters for T2 weighted images - Correct Answers TR= 3000-6000
TE= 70-120ms
What are the TR and TE parameters for PD weighted images - Correct Answers TR 1500-3000
TE- 10-30
if TR is doubled what happens to the scan time - Correct Answers doubled
what is the formula to calculate scan time
2D vs 3D vs Fast spin Echos - Correct Answers TR x phase matrix x nex. - 2D
TR x phase matrix x NEX X number of slabs -3D
Fast spin echos: TR x Phase matrix x (NEX/ETL)
what are some ways you can reduce scan time (3) - Correct Answers reduce TR
reduce NEX increase parallel imaging factors
Changing slice thickness directs affects (3) - Correct Answers signal to noise ratio of the image
formation with correct answers 100%
2026
T1 relaxation is also called - Correct Answers spin lattice
T1 regrowth along which axis - Correct Answers longitudinal (z)
what is the percent of recovery for T1 relaxation time - Correct Answers 63% longitudinal
magnetization
T2 relaxation take what type of percent - Correct Answers 37
Describe FAT time as it relates to T1 & T2 relaxation times - Correct Answers short
short
Describe water as it relates to T1 & T2 relaxation times - Correct Answers Long
Long
To obtain low signal, there must be _________________ component of magnetization in the
transverse plane of the coil - Correct Answers a small
To obtain high signal there has to be a _____________ component of magnetization in the
transverse plane of the coil - Correct Answers large
In a T1 weighted image explain the difference between Fat and water
,and what that means in relation ship to the NMV - Correct Answers T1 time fat is shorter than
water
Fat Bright- high signal
Water- dark -low signal
NMV in fat realigns with Bo faster than water
In a T2 weighted image explain the difference between Fat and water
and what that means in relation ship to the NMV - Correct Answers T2 time fat is shorter than
water-- but the magnitude of fat is to small
fat- dark
water- bright
what is the controlling parameter of T1 images - Correct Answers TR
what is the controlling parameter of T2 weighted images - Correct Answers TE
Name 4 things that increasing TR will do - Correct Answers improve SNR
Increase Scan Time
Reduce T1
Increase availabile number of slices
name what Increasing TE will do - Correct Answers Lower SNR
, do you have better SNR with short or long TE - Correct Answers better overall signal with the
shortest TE
What are the TR and TE parameters for T1 weighted images - Correct Answers TR=350-700 ms
TE=10-30 ms
What are the TR and TE parameters for T2 weighted images - Correct Answers TR= 3000-6000
TE= 70-120ms
What are the TR and TE parameters for PD weighted images - Correct Answers TR 1500-3000
TE- 10-30
if TR is doubled what happens to the scan time - Correct Answers doubled
what is the formula to calculate scan time
2D vs 3D vs Fast spin Echos - Correct Answers TR x phase matrix x nex. - 2D
TR x phase matrix x NEX X number of slabs -3D
Fast spin echos: TR x Phase matrix x (NEX/ETL)
what are some ways you can reduce scan time (3) - Correct Answers reduce TR
reduce NEX increase parallel imaging factors
Changing slice thickness directs affects (3) - Correct Answers signal to noise ratio of the image
