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MRI ARMRIT 2024 Practice Test #1 Questions and Answers 2024
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MRI ARMRIT 2024 Practice Test #1
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MRI ARMRIT 2024 Practice Test #1An equation derived to predict the MR signal intensity of a particular tissue as the result
of a Spin-echo pulse sequence is the:
A) Larmor equation
B) Bloch equation
C) Phase shifts formula
D) Resonance frequency formula - answerB) Bloch equation
The component Mz is most associated with:
A) Transverse to Bo; T2 relaxation; transverse magnetization
B) Anti-parallel to Bo; T2 relaxation; net magnetization
C) Parallel to Bo; T1 relation; longitudinal magnetization
D)Perpendicular to Bo; T2 decay; FID - answerC) Parallel to Bo; T1 relation; longitudinal
magnetization
The main magnetic field of MRI systems in clinical use must meet an acceptable
specification of:
A) 10-15 PPM
B) 20-30 PPM
C) 40-50 PPM
D) 60-80 PPM - answerB) 20-30 PPM
Of the following statements., which describes part of the basics MR imagining process?
A) A patient is placed isocenter in a inhomogeneous magnetic field
B) The patient is exposed to ionizing radiation
C) The generated image contains hypertense and hypodense areas
D) RF signals interact with hydrogen protons - answerD) RF signals interact with
hydrogen protons
When is the net magnetization vector at its maximum magnitude?
A) Transverse to Bo
B) Anti parallels Bo
C) Parallel to B1
D) At equilibrium - answerD) At equilibrium
, What is the gyro-magnetic ration of hydrogen?
A) 17.23 MHz
B) 11.26 MHz
C) 42.58 MHz
D) 40.05MHz - answerC) 42.58 MHz
The transmit radio-frequency coil generates a second electromagnetic field to the
hydrogen protons. This field is designated:
A) Bo
B) Bz
C) B1
D) Bxy - answerC) B1
When type of receiver radio-frequency coil placed in the main magnetic field of the MRI
system, the hydrogen protons will:
A) Solenoid coils
B) Maxwell coils
C) Surface coils
D) Golay coils - answerC) Surface coils
Once the patients area of interest is placed in the main magnetic field of the MRI
system, the hydrogen protons will:
A) Process parallel to B1
B) Process parallel to Bo
C) Process orthogonal to Bo
D) Process randomly in Bo - answerB) Process parallel to Bo
The basic process of MR signal generation contains two basic steps, they are:
A) Parallel alignment and anti-parallel alignment
B) Stimulation and relaxation
C) Magnetization and ionization
D) Spatial localization and Fourier transform - answerB) Stimulation and relaxation
on a very basic level, three basic components required to attain MR Signals are:
A) Magnetic field, proton, ionizing radiation
B) Magnetic field, electron, ionizing radiation
C) Magnetic field, electron, radio-wave
D) magnetic field, proton, radio-wave - answerD) magnetic field, proton, radio-wave
The mechanism of T2 contrast enhancement agents is to:
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