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MRI Physics Final Exam Questions and Answers (Latest Update 2024)
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MRI Physics Final Exam Questions and Answers (Latest Update 2024)
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MRI Physics Final Exam Questions andAnswers (Latest Update 2024)
As the B0 increases, SNR will - Correct Answer ✅ Increase
The scan time can be determined by - Correct Answer ✅ 1.
NEX
2. Number of phase encoding
The precessional difference between hydrogen in fat and
hydrogen in water in a 1.5 T magnet is - Correct Answer ✅
224 Hz
A chemical shift phenomenon that is useful to void signal
from fat is known as - Correct Answer ✅ fat saturation
What effect does increasing TE have on SNR? - Correct
Answer ✅ decrease it
In a 1T magnet, fat and water will be "in phase" respectively
at a TE of ____ msec. - Correct Answer ✅ 6.7
,MRI Physics Final Exam Questions and
Answers (Latest Update 2024)
A broad receiver bandwidth will contain less noise than a
narrow bandwidth. - Correct Answer ✅ False
The precessional difference in ppm between hydrogen in fat
and hydrogen in water is - Correct Answer ✅ 3.5 ppm
Which of the following pulse sequence does not use a 180
degree refocusing RF pulse? - Correct Answer ✅ gradient
echo
Doubling the NEX will increase the SNR by what factor? -
Correct Answer ✅ 1. 1.41
3. SQR Root of 2
Increasing the slice thickness from 5mm to 10 mm will
decrease SNR - Correct Answer ✅ false
Increasing the TR will have what kind of affect on the image?
- Correct Answer ✅ 1. decrease T1-weighting contrast
3. Increase SNR
, MRI Physics Final Exam Questions and
Answers (Latest Update 2024)
If NEX is doubled, scan time will be cut in half and the SNR
will decrease by 41%. - Correct Answer ✅ False
Quadrature could provide a 41% increase in SNR over linear
coils. - Correct Answer ✅ True
Which of the following gradient oscillates between positive
and negative amplitudes in EPI? - Correct Answer ✅
frequency encoding gradient
Which of the following statements are true? - Correct
Answer ✅ 2. Noise depends on the build of the patient and
the area under examination and the inherent noise of the
system.
3. Noise occurs at all frequencies and is random in time
What type of imaging uses the acronyms SENSE, GRAPPA,
and iPAT? - Correct Answer ✅ parallel imaging
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