ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 600 QUESTIONS AND CORRECT DETAILED ANSWERSWITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+
Processing
ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 600 QUESTIONS AND CORRECT DETAILED ANSWERSWITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+
ARRT MRI EXAM, FINAL EXAM, PRACTICE EXAM
AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 600
QUESTIONS AND CORRECT DETAILED
ANSWERSWITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
ARRT MRI EXAM
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 radiofrequency 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: - ANSWERDephase
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 radiofrequency 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
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
Which equation is true of the relaxation process? - ANSWERWithout 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
MR 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
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? - ANSWERSuperconcuctive
jordancarter 7 months ago
This study guide is clear, well-organized, and covers all the essential topics. The explanations are concise, making complex concepts easier to understand. It could benefit from more practice questions, but overall, it's a great resource for efficient studying. Highly recommend!
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