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ARMRIT EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS
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ARMRIT EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS
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By: tfox911medic • 5 months ago
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ARMRIT EXAM QUESTIONS AND ANSWERSWITH COMPLETE SOLUTIONS
Different tissues that have signals that appear similar on an MR image are described as:
A) hypointense
B) hyperintense
C) isointense
D) isodense
isointense
in 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
A) precession
B) resonance
C) frequency
D) angular momentum
precession
magnetic resonance imaging is derived from the process known as:
A) magnetic resonance angiography
B) magnetic relaxation imaging
C) nuclear magnetic resonance
D) nuclear resonance imaging nuclear magnetic resonance
Once the nmv has moved away from equilibrium, the following will occur
A) the longitudinal component will increase
B) the transverse component will decrease
C) the longitudinal component will stay the same
D) the transverse component will increase
the transverse component will increase
In MR, substances respond to a specific radio frequency which is known as:
A) magnetic frequency
B) radio frequency
C) gyro-magnetic frequency
D) resonance frequency
resonance frequency
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:
A) intravascular to interstitial
B) extracellular to intracellular
C) hepatobiliary to renal
D) extradural to renal
intravascular to interstitial t2 is the measurement of time fot the transverse component of the NMV to decrease what percentage of its maximum value after the application of a 90 degree radio-frequency pulse
A) 33%
B) 63%
C) 37%
D) 67%
37%
in the USA, the MRI system's magnetic field and vector that represents it is symbolized:
A) B1
B) B2
C) B3
D) B0
B0
The resonance frequency of any substance in a magnetic field can be calculated by employing the
A) damadian equation
B) larmor equation
C) faraday equation
D) lauterbur equation
Larmor equation
in a pulse sequence, transmitting an initial 90 degree radio-
frequency pulse will cause the NMV to: A) remain at equilibrium
B) shift in both size and direction
C) move to antiparallel
D) rephase
shift in both size and direction
Which type of electromagnetic coils are designed to stimulate and detect an MR signal?
A) gradient coils
B) radio-frequency coils
C) shim coils
radio-frequency
tissues that are less efficient at spin-spin interactions because they contain more free water, such as CSF, should have
A) High T2 values and produce hypointense signals
B) HIgh T2 values and produce hyperintense signals
C) low T2 values and produce hypointnese signals
D) low T2 values and produce hyperintense signal
High T2 values and produce hyperintense signals
magnetism can be defined as the ability of certain substances to attract:
A) Copper, aluminum, tin
B) Iron, cobalt, nickel
C) Bronze, niobium, titanium
D) Neodymium, niobium-titanium, lodestone
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