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ARMRIT EXAM STUDY GUIDE QUESTIONS COMPLETE WITH DETAILED VERIFIED ANSWERS 100% CORRECT /A+GRADED
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ARMRIT EXAM STUDY GUIDE QUESTIONS COMPLETE WITH DETAILED VERIFIED ANSWERS 100% CORRECT /A+GRADED
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KC
LO
ARMRIT EXAM STUDY
YC
GUIDE QUESTIONS
COMPLETE WITH
D
DETAILED VERIFIED
U
ANSWERS 100% CORRECT
ST
/A+GRADED
,Different tissues that have signals that appear similar on an MR image are described as:
A) hypointense
B) hyperintense
C) isointense
D) isodense - ANS isointense
in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton
K
has been described as wobbling like a spinning top. this motion is called
A) precession
B) resonance
C
C) frequency
D) angular momentum - ANS precession
LO
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 - ANS nuclear magnetic resonance
YC
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 - ANS the transverse component will increase
D
In MR, substances respond to a specific radio frequency which is known as:
A) magnetic frequency
U
B) radio frequency
C) gyro-magnetic frequency
D) resonance frequency - ANS resonance frequency
ST
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 - ANS 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% - ANS 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 - ANS B0
K
The resonance frequency of any substance in a magnetic field can be calculated by employing
the
C
A) damadian equation
B) larmor equation
C) faraday equation
LO
D) lauterbur equation - ANS Larmor equation
in a pulse sequence, transmitting an initial 90 degree radio-frequency pulse will cause the NMV
to:
A) remain at equilibrium
YC
B) shift in both size and direction
C) move to antiparallel
D) rephase - ANS shift in both size and direction
Which type of electromagnetic coils are designed to stimulate and detect an MR signal?
A) gradient coils
D
B) radio-frequency coils
C) shim coils - ANS radio-frequency
U
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
ST
B) HIgh T2 values and produce hyperintense signals
C) low T2 values and produce hypointnese signals
D) low T2 values and produce hyperintense signal - ANS 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 - ANS Iron, cobalt, nickel
, the purpose of magnetic resonance angiography is to image the:
A) stationary soft tissue
B) blood flow
C) vessel lumen
D) only abnormal vessels - ANS blood flow
the strength of very large magnetic fields like those employed in MRI systems, the SI unit most
commonly used is:
A) Tesla
B) Gauss
K
C) Kilogauss
D) militesla - ANS Tesla
C
the larmor frequency of hydrogen protons in a 1.5 tesla magnetic field is:
A) 6.4 MHZ/Tesla
B) 12.8 MHz/Tesla
LO
C) 25.5 MHz/tesla
D) 63.9 MHz/tesla - ANS 63.9 MHz/Tesla
In MR imaging, for chemical substance to be affected by the main magnetic field and the
radio-wave it must contain an:
YC
A) Odd number of electrons
B) Odd number of total protons and neutrons
C) Even number of total electrons and neutrons
D) even number of protons - ANS Odd number of total protons and neutrons
A 1.5T magnetic field is equal to:
D
A) 150 gauss
B) 1500 gauss
C) 15,000 gauss
U
D) 150,000 gauss - ANS 15,000 gauss
the components of the gyromagnetic ratio are:
ST
A) stimulation to relaxation
B) protons to electrons
C) magnetic moment to angular momentum
D) main magnetic field to radio-frequency signal - ANS magnetic moment to angular
momentum
fast transition phenomenon and entry phenomenon are theories that explain which of the
following characterisitics:
A) T1 effects
B) T2 effects
C) hydrogen concentration
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