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ARMRIT Study Guide 2024 Questions and Answers (2024 / 2025) Updated Latest (Verified Answers)
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ARMRIT Study Guide 2024 Questions and Answers (2024 / 2025) Updated Latest (Verified Answers)
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1 /108ARMRIT STUDY GUIDE1.At any one time, human body tissue, in general, is made up of 50 - 90% of what substance?
a.C13
b.NA 23
c.H²O
d.H
ANS H²O
2.Tissues that are very efficient at spin-lattice interactions near the Larmor
frequency, such as fatty tissues, should have
Low T1 values and produces hyperintense signals. High T1 values and produce hyperintense signals. High T1 values and produce hypointense signals.
Low T1 values and produce hypointense signals.
ANS Low T1 values and produces hyperintense signals.
3.The Larmor frequency of hydrogen protons in a 1.5 Tesla magnetic field is 2 /1086.4 MHz/Tesla.
MHz/Tesla.
25.5 MHz/Tesla.
63.9 MHz/Tesla.
ANS 63.9 MHz/Tesla.
4.In clinical MR imaging of the human body, the substance of interest is
H.
NA23.
P31.
H²O.
ANS H. (hydrogen)
5.The main magnetic field of the MRI system is described as constant and always oriented in one set direction, either horizontal or vertical (dependent on type of magnet). The transmitted radio-frequency, in comparison, is described as
Constant and always parallel to Bo. Oscillating and always parallel to Bo. 3 /108Constant and always perpendicular to Bo.
Oscillating and always perpendicular to Bo.
ANS Oscillating and always perpendic- ular to Bo.
6.The component Mxy is most associated with
Anti-parallel to Bo; T1 relaxation; net magnetization. 4 /108Transverse to Bo; T2 relaxation; transverse magnetization. Parallel to Bo; T1 relaxation; longitudinal magnetization.
Perpendicular to B1; T1 decay; FID.
ANS Transverse to Bo; T2 relaxation;
transverse magnetization.
7.The T2 process is also known as
Spin-Spin.
Spin density.
Spin-Lattice.
Spin-warp.
ANS Spin-Spin.
8.Magnetic fields have strength and direction, which are represented by a
Field line. Axis.
Vector.
Gauss line.
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