Exam (elaborations)
ARMRIT 1 FLASHCARDS QUESTIONS WITH CORRECT ANSWERS
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Exam of 4 pages for the course ARMRIT at ARMRIT (ARMRIT 1 FLASHCARDS)
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ARMRIT 1 FLASHCARDSIsotense - answerDifferent tissues that have signals that appear similar on an MR image
are described as:
Precession - answerIn a large main magnetic field such as those employed in MRI, the
motion of a hydrogen proton has been described as wobbling like a spinning top. This
motion is called:
Nuclear Magnetic Resonance - answerMagnetic Resonance imaging is derived from the
process known as:
The transverse component will increase - answerOnce the net magnetization(NMV) has
moved away from the equilibrium, the following will occur:
Resonance frequency - answerIn MRI, substances respond to a specific radio
frequency which is known as:
Intravascular to interstitial - answerThe introduction of gadolinium based contrast
enhancement agents by Intravenous injection can involve passing through an abnormal
blood barrier. The tissue compartments involved are:
63% - answerT2 is the measurement of time for the transverse component of the net
magnetization vector to decrease what percentage of its maximum value after the
application of a 90 degree radio-frequency pulse:
In the USA, the MRI system's main magnetic field and the vector that represents it is
symbolized: - answerBO
Larmor equation - answerThe resonance frequency of any substances in a magnetic
field can be calculated by:
Shift in both DIRECTION and SIZE - answerIn a pulse sequence, transmitting an initial
90 degree radio-frequency pulse will cause the net magnetization vector to:
High T2 values and produce HYPERintense signals - answerTissues that are less
efficient at spin-spin interactions because they contain more free water, such as CSF,
should have:
Radio-Frequency coils - answerWHich type of electromagnetic coils are designed to
stimulate and detect an MR signal?
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