ARMRIT UPDATED Exam Questions and
CORRECT Answers
Different tissues that have signals that appear similar on an MR image are described as:
A) hypointense
B) hyperintense
C) isointense
D) isodense - CORRECT ANSWER- isointense
in a large main magnetic field such as those employed in MRI, the ...
Different tissues that have signals that appear similar on an MR image are described as:
A) hypointense
B) hyperintense
C) isointense
D) isodense - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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% - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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 - CORRECT ANSWER- 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
C) Kilogauss
D) militesla - CORRECT ANSWER- Tesla
the larmor frequency of hydrogen protons in a 1.5 tesla magnetic field is:
A) 6.4 MHZ/Tesla
B) 12.8 MHz/Tesla
C) 25.5 MHz/tesla
D) 63.9 MHz/tesla - CORRECT ANSWER- 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:
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 - CORRECT ANSWER- Odd number of total protons and
neutrons
A 1.5T magnetic field is equal to:
A) 150 gauss
B) 1500 gauss
C) 15,000 gauss
D) 150,000 gauss - CORRECT ANSWER- 15,000 gauss
the components of the gyromagnetic ratio are:
A) stimulation to relaxation
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