ARMRIT newest updated Exam with accurate detailed || || || || || || ||
solutions
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
|| ||
solutions
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
|| ||
