ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
The effects of main magnetic field inhomogeneities on the FID signal are
corrected for in a Spin-echo sequence by applying a second radio-
frequency pulse. The flip angle of this radio-frequency pulse is: - ANSWER-
-180 degrees
Of the following statements, which describes part of the basic MR imaging
process? - ANSWER--Radio-frequency signals interact with hydrogen
protons
Which type of electromagnetic coils correct inhomogeneities in the main
magnetic field? - ANSWER--Shim coils
Immediately after an initial 90 degree radio-frequency pulse is turned off,
the hydrogen protons will begin to: - ANSWER--Dephase
Tissues that are very efficient at Spin-lattice interactions near the Larmor
frequency, such as fatty tissues, should have: - ANSWER--Low T1 values
and produces hyperintense signals
T1 is the measurement of time for the longitudinal component of the net
magnetization vector to recover what percentage of its original value after
the application of a 90 degree radio-frequency pulse? - ANSWER--63%
The tissue characteristic which depends more on the state (solid, liquid,
gas) of a tissue than any other factor is: - ANSWER--T2 effects
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
The basic process of MR signal generation contains two basic steps, they
are: - ANSWER--Stimulation and relaxation
The T1 Process is also known as: - ANSWER--Spin-Lattice
The T2 process is also known as: - ANSWER--Spin-Spin
Once in the main magnetic field, a majority of hydrogen protons will align
themselves: - ANSWER--Parallel to B0
Magnetic resonance imaging is derived from the process known as: -
ANSWER--Nuclear magnetic resonance
The tissue characteristic that depends heavily on the relative content of fat
molecules and free water is: - ANSWER--T1 effects
Which type of receiver radio-frequency coil is placed close to the patient's
body for the purpose of imaging superficial anatomic structures? -
ANSWER--Surface coils
An equation derived to predict the MR signal intensity of a particular tissue
as a result of a spin-echo pulse sequence is the: - ANSWER--Larmor
equation
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
Which equation is true of the relaxation process? - ANSWER--Without the
effects of T2 star, T2 decay continues
Because of the spinning motion of the hydrogen proton it has the same
properties as a bar magnet. The hydrogen proton's spinning motion gives it
a: - ANSWER--Magnetic moment
On a proton density image, two types of tissue that contain very low
concentrations of hydrogen appear very hypointense are: (RESEARCH
THIS) - ANSWER--Cortical bone and lung (RESEARCH THIS)
Magnetic susceptibility is defined as: (RESEARCH THIS) - ANSWER--
Tendency of a substance to attract or repel magnetic lines of force which is
decided by the magnetic properties of its electrons (RESEARCH THIS)
In comparison to Computed Axial Tomography, an advantage of MRI is: -
ANSWER--Superior soft-tissue contrast resolution
Fast transition phenomenon and entry phenomenon are theories that
explain which of the following tissue characteristics? - ANSWER--Velocity
effects
In a loop of conductor in which an electric current is introduced and
maintained, a magnetic field will be produced in the center perpendicular to
the flow of electric current. This is called: - ANSWER--Faraday's Law
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
Which type of MRI magnet has attainable field strengths of 0.35 Tesla to 3
Tesla for clinical use in the U.S.A, and higher strengths elsewhere and in
research? - ANSWER--Superconcuctive
The Process of relaxation begins when - ANSWER--B1 is turned off
A sinewave is a symbol used to measure electromagnetic energy. A
sinewave's two components of measure are: - ANSWER--Wavelength and
frequency
Magnetic fields have direction which are usually designated as north and
south, therefore magnetic fields are described as: - ANSWER--Dipoles
At any one time, human body tissue, in general, is made up of 50-90%: -
ANSWER--H(Hydrogen)
Once the net magnetization vector (NMV) has moved away from
equilibrium the following will occur: - ANSWER--The transverse component
will increase
The T1 process is also known as: - ANSWER--Spin-Lattice
Which of the following is the Larmor equation? - ANSWER--W0=Y+B0
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
The effects of main magnetic field inhomogeneities on the FID signal are
corrected for in a Spin-echo sequence by applying a second radio-
frequency pulse. The flip angle of this radio-frequency pulse is: - ANSWER-
-180 degrees
Of the following statements, which describes part of the basic MR imaging
process? - ANSWER--Radio-frequency signals interact with hydrogen
protons
Which type of electromagnetic coils correct inhomogeneities in the main
magnetic field? - ANSWER--Shim coils
Immediately after an initial 90 degree radio-frequency pulse is turned off,
the hydrogen protons will begin to: - ANSWER--Dephase
Tissues that are very efficient at Spin-lattice interactions near the Larmor
frequency, such as fatty tissues, should have: - ANSWER--Low T1 values
and produces hyperintense signals
T1 is the measurement of time for the longitudinal component of the net
magnetization vector to recover what percentage of its original value after
the application of a 90 degree radio-frequency pulse? - ANSWER--63%
The tissue characteristic which depends more on the state (solid, liquid,
gas) of a tissue than any other factor is: - ANSWER--T2 effects
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
The basic process of MR signal generation contains two basic steps, they
are: - ANSWER--Stimulation and relaxation
The T1 Process is also known as: - ANSWER--Spin-Lattice
The T2 process is also known as: - ANSWER--Spin-Spin
Once in the main magnetic field, a majority of hydrogen protons will align
themselves: - ANSWER--Parallel to B0
Magnetic resonance imaging is derived from the process known as: -
ANSWER--Nuclear magnetic resonance
The tissue characteristic that depends heavily on the relative content of fat
molecules and free water is: - ANSWER--T1 effects
Which type of receiver radio-frequency coil is placed close to the patient's
body for the purpose of imaging superficial anatomic structures? -
ANSWER--Surface coils
An equation derived to predict the MR signal intensity of a particular tissue
as a result of a spin-echo pulse sequence is the: - ANSWER--Larmor
equation
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
Which equation is true of the relaxation process? - ANSWER--Without the
effects of T2 star, T2 decay continues
Because of the spinning motion of the hydrogen proton it has the same
properties as a bar magnet. The hydrogen proton's spinning motion gives it
a: - ANSWER--Magnetic moment
On a proton density image, two types of tissue that contain very low
concentrations of hydrogen appear very hypointense are: (RESEARCH
THIS) - ANSWER--Cortical bone and lung (RESEARCH THIS)
Magnetic susceptibility is defined as: (RESEARCH THIS) - ANSWER--
Tendency of a substance to attract or repel magnetic lines of force which is
decided by the magnetic properties of its electrons (RESEARCH THIS)
In comparison to Computed Axial Tomography, an advantage of MRI is: -
ANSWER--Superior soft-tissue contrast resolution
Fast transition phenomenon and entry phenomenon are theories that
explain which of the following tissue characteristics? - ANSWER--Velocity
effects
In a loop of conductor in which an electric current is introduced and
maintained, a magnetic field will be produced in the center perpendicular to
the flow of electric current. This is called: - ANSWER--Faraday's Law
, ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND
STUDY GUIDE LATEST 2024 ACTUAL EXAM 650
QUESTIONS AND CORRECT DETAILED |ALREADY
GRADED A+
Which type of MRI magnet has attainable field strengths of 0.35 Tesla to 3
Tesla for clinical use in the U.S.A, and higher strengths elsewhere and in
research? - ANSWER--Superconcuctive
The Process of relaxation begins when - ANSWER--B1 is turned off
A sinewave is a symbol used to measure electromagnetic energy. A
sinewave's two components of measure are: - ANSWER--Wavelength and
frequency
Magnetic fields have direction which are usually designated as north and
south, therefore magnetic fields are described as: - ANSWER--Dipoles
At any one time, human body tissue, in general, is made up of 50-90%: -
ANSWER--H(Hydrogen)
Once the net magnetization vector (NMV) has moved away from
equilibrium the following will occur: - ANSWER--The transverse component
will increase
The T1 process is also known as: - ANSWER--Spin-Lattice
Which of the following is the Larmor equation? - ANSWER--W0=Y+B0
