ARMRIT Part 2 questions with accurate detailed solutions || || || || || || ||
When selecting only one slice at a time during a pulse sequence, which method for
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providing spatial localization is employed? - correct answer✔✔2DFT
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Tissues that have low (short) relaxation times have: - correct answer✔✔Higher relaxation
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rates
For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
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Gap: 1mm/ Slice#: 9 / NEX: 4 / Matrix: 192 -- Increasing Matrix will: - correct
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answer✔✔Increase resolution ||
Combining a metal ion with a ligand reduces their tendency to bind to proteins, enzymes or
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membranes. The degree to which they dissociate is a measure of their: - correct
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answer✔✔Toxicity
A complicated equation for predicting the MR signal intensity from a tissue subject to a
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spin-echo sequence is the: - correct answer✔✔Bloch equation
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Which is a normally enhancing structure after the administration of MRI I.V. gadolinium? -
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correct answer✔✔Choroid plexus
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Who described the mathematical method for converting a time-varying signal into its
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frequency components, which are used to obtain positional information from the MR
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signal? - correct answer✔✔Jean-Baptiste-Joseph Fourier
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Using the following protocol, determine the scan time for this pulse sequence: (round off
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your answer to the nearest minute.) FOV: 320mm / TR: 2000ms / TE: 20/80ms / NEX: 1 /
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Matrix: 256x128 - correct answer✔✔4 mins
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, The two types of enhancement media, described by Lauffer, the mechanism of T2 agents is:
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- correct answer✔✔To decrease T2 relaxation time, thus emitting LOW signal
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In spatial localization, the "logical" phase encoding gradient is symbolized? - correct
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answer✔✔Gy
For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice# 9 / NEX: 4 / Matrix: 192 ; Increasing NEX will: - correct
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answer✔✔Increase SNR and Resolution || || ||
Information acquired when you increase or decrease the frequency of the RF pulse of the
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Gs, causing the center of the excited place to change with the center of the Gs RF pulse is: -
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correct answer✔✔Slice position
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The "best" technique for improving image quality is to increase: - correct answer✔✔NEX
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For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice#: 9 / NEX: 4 / Matrix: 192 / Decreasing NEX will: - correct
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answer✔✔Decrease SNR and Resolution || || ||
Spatial resolution is an image quality factor determined by ______ and ________. - correct
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answer✔✔Slice thickness / pixel size || || || ||
For the following spin-echo protocol; FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice#: 9 / NEX 4 / Matrix: 192 / Decreasing TE will: - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Increase the # of allowable slices || || || || ||
When selecting only one slice at a time during a pulse sequence, which method for
|| || || || || || || || || || || || || || ||
providing spatial localization is employed? - correct answer✔✔2DFT
|| || || || || || ||
Tissues that have low (short) relaxation times have: - correct answer✔✔Higher relaxation
|| || || || || || || || || || || ||
rates
For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice#: 9 / NEX: 4 / Matrix: 192 -- Increasing Matrix will: - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Increase resolution ||
Combining a metal ion with a ligand reduces their tendency to bind to proteins, enzymes or
|| || || || || || || || || || || || || || || ||
membranes. The degree to which they dissociate is a measure of their: - correct
|| || || || || || || || || || || || || ||
answer✔✔Toxicity
A complicated equation for predicting the MR signal intensity from a tissue subject to a
|| || || || || || || || || || || || || || ||
spin-echo sequence is the: - correct answer✔✔Bloch equation
|| || || || || || ||
Which is a normally enhancing structure after the administration of MRI I.V. gadolinium? -
|| || || || || || || || || || || || || ||
correct answer✔✔Choroid plexus
|| ||
Who described the mathematical method for converting a time-varying signal into its
|| || || || || || || || || || || ||
frequency components, which are used to obtain positional information from the MR
|| || || || || || || || || || || ||
signal? - correct answer✔✔Jean-Baptiste-Joseph Fourier
|| || || ||
Using the following protocol, determine the scan time for this pulse sequence: (round off
|| || || || || || || || || || || || || ||
your answer to the nearest minute.) FOV: 320mm / TR: 2000ms / TE: 20/80ms / NEX: 1 /
|| || || || || || || || || || || || || || || || || ||
Matrix: 256x128 - correct answer✔✔4 mins
|| || || || ||
, The two types of enhancement media, described by Lauffer, the mechanism of T2 agents is:
|| || || || || || || || || || || || || || ||
- correct answer✔✔To decrease T2 relaxation time, thus emitting LOW signal
|| || || || || || || || || ||
In spatial localization, the "logical" phase encoding gradient is symbolized? - correct
|| || || || || || || || || || || ||
answer✔✔Gy
For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice# 9 / NEX: 4 / Matrix: 192 ; Increasing NEX will: - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Increase SNR and Resolution || || ||
Information acquired when you increase or decrease the frequency of the RF pulse of the
|| || || || || || || || || || || || || || ||
Gs, causing the center of the excited place to change with the center of the Gs RF pulse is: -
|| || || || || || || || || || || || || || || || || || || ||
correct answer✔✔Slice position
|| ||
The "best" technique for improving image quality is to increase: - correct answer✔✔NEX
|| || || || || || || || || || || ||
For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice#: 9 / NEX: 4 / Matrix: 192 / Decreasing NEX will: - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Decrease SNR and Resolution || || ||
Spatial resolution is an image quality factor determined by ______ and ________. - correct
|| || || || || || || || || || || || || ||
answer✔✔Slice thickness / pixel size || || || ||
For the following spin-echo protocol; FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice
|| || || || || || || || || || || || || || || || || ||
Gap: 1mm/ Slice#: 9 / NEX 4 / Matrix: 192 / Decreasing TE will: - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Increase the # of allowable slices || || || || ||
