MRI Registry Review Questions with Verified Answers| Latest Update Graded A+
This type of magnet does not require a constant source of electricity to maintain B0...
Superconducting
What are the two types of magnetic shielding? active and passive
A spinning proton creates a? magnetic field
vectors indicate both? magnitude and direction
At thermal equilibrium there are more? Low energy protons
T2 is time it takes for ____% spins to decay 63%
MR signal is only sampled in the ______________________ plane. Transverse
What property of the nucleus makes it MR active? Spin
What is the role of B0? Align the protons (Thermal Equilibrium)
How many sets of gradients are there? 3
TR Controls which contrast weighting? T1
Echo Time (TE) controls what contrast weighting? T2
, What three factors make up the image quality triangle? SNR, Spatial Resolution and scan
time
Unwanted and undesirable frequencies in the MRI environment are known as? Noise
Which pulse sequence begins with an 180 degree RF pulse? Inversion Recovery
The 180 RF pulse rephases (refocuses)spins and corrects for? Inhomogeneties
T2* happens due to Susceptibility, inhomogeneities, and chemical shift
The ________ matrix directly influences SNR but does not affect scan time. frequency
Fat has ___________ T1 and T2 times compared to water? short
Which gradient changes for each TR period? Phase encoding gradient
Which gradient samples the echo? frequency encoding gradient
K space is where ___________ raw data is stored during the data collection process. raw
data
Once all of the needed data has been collected, it is turned into an image by applying a?
Fourier transform
Image contrast in stored in the ____________ of k-space center
This type of magnet does not require a constant source of electricity to maintain B0...
Superconducting
What are the two types of magnetic shielding? active and passive
A spinning proton creates a? magnetic field
vectors indicate both? magnitude and direction
At thermal equilibrium there are more? Low energy protons
T2 is time it takes for ____% spins to decay 63%
MR signal is only sampled in the ______________________ plane. Transverse
What property of the nucleus makes it MR active? Spin
What is the role of B0? Align the protons (Thermal Equilibrium)
How many sets of gradients are there? 3
TR Controls which contrast weighting? T1
Echo Time (TE) controls what contrast weighting? T2
, What three factors make up the image quality triangle? SNR, Spatial Resolution and scan
time
Unwanted and undesirable frequencies in the MRI environment are known as? Noise
Which pulse sequence begins with an 180 degree RF pulse? Inversion Recovery
The 180 RF pulse rephases (refocuses)spins and corrects for? Inhomogeneties
T2* happens due to Susceptibility, inhomogeneities, and chemical shift
The ________ matrix directly influences SNR but does not affect scan time. frequency
Fat has ___________ T1 and T2 times compared to water? short
Which gradient changes for each TR period? Phase encoding gradient
Which gradient samples the echo? frequency encoding gradient
K space is where ___________ raw data is stored during the data collection process. raw
data
Once all of the needed data has been collected, it is turned into an image by applying a?
Fourier transform
Image contrast in stored in the ____________ of k-space center
