KAHOOT Flashcards
Used for clinical setting purposes?
A. Hydrogen electron
B. Hydrogen proton
C. Helium electron
D. Helium proton
B. Hydrogen proton
Our current proton status (as we speak)…
A. Resonance
B. Precession
C. Relaxation
D. Randomization
D. Randomization
42.6 MHz?
A. Gyromagnetic ratio
B. Planck constant
C. Avogadro’s number
D. Faraday’s law
A. Gyromagnetic ratio
Which of the following magnets can be turned off at the end of the day?
A. Permanent
B. Resistive
C. Superconducting
B. Resistive
If a hospital loses power, a superconducting magnet will?
A. Lose field; not dangerous
B. Lose field; still dangerous
C. Not lose field; not dangerous
D. Not lose field; still dangerous
D. Not lose field; still dangerous
Which of the following field strengths has largest NMV?
A. 0.5T
B. 1.0T
C. 1.5T
D. 3T
D. 3T
Which of the following is NOT a name for main magnetic field?
A. B0
B. B1
C. Static magnetic field
B. B1
Which of the following occurs when a patient lies on scanning table?
A. Protons resonate at Larmor frequency
B. Protons precess at Larmor frequency
C. More protons align against B0 than with B0
D. Protons rotate in phase
B. Protons precess at Larmor frequency
What is precessional frequency of hydrogen at 0.5T?
A. 21.3 MHz
B. 42.6 MHz
C. 63.9 MHz
D. 85.2 MHz
A. 21.3 MHz
The Larmor Equation is used to determine?
A. Static field strength
B. Amount of RF deposition
C. Resonant frequency
D. All of these
C. Resonant frequency
Which of the following does NOT match the others?
A. 63% of NMV returned to B0
B. T2 decay
C. Longitudinal relaxation
D. Spin lattice relaxation
B. T2 decay
Which of the following does NOT match the others?
A. 37% of NMV remains in phase
B. T2 decay
C. Longitudinal magnetization
D. Spin spin relaxation
C. Longitudinal magnetization
Compared to X-rays, MRI has?
A. Long WL; low frequency
B. Short WL; low frequency
C. Long WL; high frequency
D. Short WL; high frequency
A. Long WL; low frequency
Which of the following receives signal from the patient?
A. Gradient coil
B. RF coil
C. Shim coil
D. Shielding coil
B. RF coil
The atomic number is the number of:
A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons
B. Protons
The mass number is the number of:
A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons
D. Neutrons and protons
An isotope is the result of a charge in:
A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons
A. Neutrons
An ion is the result of a change in:
A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons
C. Electrons
Which of the following states that a magnetic field is created by movement of a charged particle?
A. Ohm’s law
B. Lenz’s law
C. Faraday’s Law of Induction
D. Lorentz Force Law
C. Faraday’s Law of Induction
MR active nuclei are all examples of:
A. Ions
B. Isotopes
C. Noble gases
D. Alloys
B. Isotopes
T1 relaxation may be known as which of the following:
A. T1 recovery
B. Spin spin relaxation
C. Proton density
D. T1 regrowth
A. T1 recovery
T2 relaxation may be known as which of the following?
A. T2 recovery
B. Spin spin relaxation
C. Spine lattice relaxation
D. T2 diffusion
B. Spin spin relaxation
T1 relaxation is the time it takes:
A. 63% loss of longitudinal magnetization
B. 37% loss of longitudinal magnetization
C. 63% loss of phase coherence
D. 37% loss of phase coherence
A. 63% loss of longitudinal magnetization
T2 relaxation is the time it takes:
A. 63% loss of longitudinal magnetization
B. 37% loss of longitudinal magnetization
C. 63% loss of phase coherence
D. 37% loss of phase coherence
C. 63% loss of phase coherence
