Exam (elaborations)
STUDY GUIDE ARMRIT Questions and Answers 2024
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Exam of 3 pages for the course ARMRIT at ARMRIT (STUDY GUIDE ARMRIT)
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STUDY GUIDE ARMRITIn a spin echo pulse sequence, which of the following eliminates T2* effects by
rephrasing the transverse magnetization and producing the echo? - answer180-degree
RF pulse
In a spin echo pulse sequence, a 180-degree RF refocusing pulse produces a signal
echo and... - answerEliminates rephrasing due to magnetic field inhomogeneities
In an inversion recovery pulse sequence, the initial excitation pulse drives the
longitudinal magnetization from +Z direction to which of the following directions? -
answer-Z
Which of the following parameters will influence T1 contrast in a GRE pulse sequence?
- answerFlip angle
In a fast(Turbo) spin echo pulse sequence, the initial slice excitation pulse is followed by
a series of which of the following? - answer180 radio frequency induced echoes
Which of the following is not an advantage of superconducting magnets? - answerQuick
turn-off capability
Superconducting magnet coils exhibit what type of resistance when operating at or
below critical temperature? - answerZero resistance
In a permanent magnet design, which of the following best describes the direction of the
main magnetic field? - answerParallel to the long axis of a body in the magnet.
What is the cryogen in a superconducting magnet? - answerLiquid helium
Conductive copper windings that alter a main magnetic field along a strict coordinate
are known as which of the following? - answerGradient coils
In an axial image, slice encoding is achieved through which of the following? - answerZ
gradient
Gradient coils are best described as which of the following? - answerShim coils that
correct for homogeneity
Which of the following best describes gradient slew rate? - answerSpeed and amplitude
of a gradient measured in mT/m/s
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