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MRI Quiz & Answers 2024/2025 exam with 100% correct answers
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Assuming all other parameters are the same, an echo time of _________ ms provides the best Signal-to-Noise Ratio. correct answers15 Fat has a ______ T1 relaxation time and a ____ T2 relaxation time correct answersShort and Short Water has a ____ T1 relaxation time and a ____ T2 relaxation tim...

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  • September 21, 2024
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  • 2024/2025
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MRI Quiz

Assuming all other parameters are the same, an echo time of _________ ms provides the best Signal-to-
Noise Ratio. correct answers15



Fat has a ______ T1 relaxation time and a ____ T2 relaxation time correct answersShort and Short



Water has a ____ T1 relaxation time and a ____ T2 relaxation time correct answersLong and Long



If the repetition time is doubled, the scan time will correct answersDouble: TR is directly porpotional to
scan time (TR x Phase Matrix x NEX)



Which of the following is NOT affected by changing the slice thickness correct answersThe T1 contrast



Which of the following would NOT compensate for the change in SNR as a result of decreasing the FOV?
correct answersReducing the number of excitations, A reduction in excitations (NEX/NSA) would reduce
SNR, which has the same effect as decreasing the FOV



Reducing the phase matrix from 256 to 192 will? correct answersAll the above



SNR increases with all the following adjustments, EXCEPT: correct answersDecreasing pixel size, smaller
pixel size; higher phase matrix; leads to improved resolution, but decreased SNR



Another name for a picture element is a correct answersPixel



What formula is used to calculate the size of the pixel correct answersFOV / matrix



Which parameter will provide the better spatial resolution correct answers4mm slice thickness; 256 x
256 matrix; thinner slices yield improved spatial resolution, in addition to smaller pixel size higher matrix

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