ARMRIT EXAM QUESTIONS AND
ANSWERS 100% CORRECT
Question : Magnetism can be defined as the ability of certain
substances to attract:
Correct answer: Iron, Cobalt, Nickel
Question : The components of the Gyro-magnetic ratio are:
Correct answer: Magnetic moment to angular momentum
Question : Which type of electromagnetic coils produce
smaller magnetic field which allow spatial localization to be performed?
Correct answer: Gradient coils
Question : Which type of MRI magnet requires cryogen to
cool magnetic coils to 4 degrees Kelvin?
Correct answer: Superconductive
Question : T2 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:
Correct answer: 37%
Question : Which cryogenic material can produce temperature
as low as 4 degrees Kelvin?
Correct answer: Liquid Helium
Question : The T1 process is also known as
Correct answer: Spin-Lattice
Question : a 90 degree radio-frequency pulse will alter the net
magnetization vector. Another effect is:
Correct answer: The hydrogen protons will have phase
coherence.
Question : Which type of MRI magnet requires no electricity
to maintain its magnetic field and can weigh from 18,000 lb.to 200,000 lb.?
Correct answer: Permanent
Question : To describe the uniformity of the MRI system's
main magnetic field, the term employed is
Correct answer: Homogeneity
Question : The purpose of magnetic resonance angiography is
to image the
Correct answer: Blood Flow
Question : Magnetic Resonance Imaging is derived from the
process known as:
Correct answer: Nuclear Magnetic resonance
Question : The introduction of gadolinium based contrast
enhancement agents by Intra-venous injection can involve passing through an abnormal blood brain barrier. The tissue
compartments involved are the:
Correct answer: Intravascular to interstitial
Question : In a pulse sequence, transmitting an initial 90
degree radio-frequency pulse will cause the net magnetization
vector to:
Correct answer: Shift in both size and direction.
Question : Which statement is true of the relaxation process?
Correct answer: Without the effects of T2 star, T2 decay
continues.
Question : Which molecule precesses closer to the Larmor
frequency?
Correct answer: Fat
Question : 1 milliliter of H2O contains how many hydrogen
protons
Correct answer: 6 times 10 ^22
Question : An equation derived to predict the MR signal
intensity of a particular tissue as the result of a Spin-echo