Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > KAHOOT > Flashcards

KAHOOT Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Physics flashcards Physics 101 flashcards
1
Q

Used for clinical setting purposes?

A. Hydrogen electron
B. Hydrogen proton
C. Helium electron
D. Helium proton

A

B. Hydrogen proton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Our current proton status (as we speak)…

A. Resonance
B. Precession
C. Relaxation
D. Randomization

A

D. Randomization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

42.6 MHz?

A. Gyromagnetic ratio
B. Planck constant
C. Avogadro’s number
D. Faraday’s law

A

A. Gyromagnetic ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the following magnets can be turned off at the end of the day?

A. Permanent
B. Resistive
C. Superconducting

A

B. Resistive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

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

A

D. Not lose field; still dangerous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following field strengths has largest NMV?

A. 0.5T
B. 1.0T
C. 1.5T
D. 3T

A

D. 3T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which of the following is NOT a name for main magnetic field?

A. B0
B. B1
C. Static magnetic field

A

B. B1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A

B. Protons precess at Larmor frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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

A. 21.3 MHz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The Larmor Equation is used to determine?

A. Static field strength
B. Amount of RF deposition
C. Resonant frequency
D. All of these

A

C. Resonant frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

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

A

B. T2 decay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

C. Longitudinal magnetization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

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

A. Long WL; low frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following receives signal from the patient?

A. Gradient coil
B. RF coil
C. Shim coil
D. Shielding coil

A

B. RF coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The atomic number is the number of:

A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons

A

B. Protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The mass number is the number of:

A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons

A

D. Neutrons and protons

17
Q

An isotope is the result of a charge in:

A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons

A

A. Neutrons

18
Q

An ion is the result of a change in:

A. Neutrons
B. Protons
C. Electrons
D. Neutrons and protons

A

C. Electrons

19
Q

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

A

C. Faraday’s Law of Induction

20
Q

MR active nuclei are all examples of:

A. Ions
B. Isotopes
C. Noble gases
D. Alloys

A

B. Isotopes

21
Q

T1 relaxation may be known as which of the following:

A. T1 recovery
B. Spin spin relaxation
C. Proton density
D. T1 regrowth

A

A. T1 recovery

22
Q

T2 relaxation may be known as which of the following?

A. T2 recovery
B. Spin spin relaxation
C. Spine lattice relaxation
D. T2 diffusion

A

B. Spin spin relaxation

23
Q

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

A. 63% loss of longitudinal magnetization

24
Q

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

A

C. 63% loss of phase coherence

25
Q

TR stands for:

A. Recovery time
B. Time to repeat
C. Repetition time
D. Time to reverse

A

C. Repetition time

26
Q

TE stands for:

A. Entrance time
B. Echo time
C. Time to emit
D. Time to encounter

A

B. Echo time

27
Q

Which formula is used to determine precessional frequency?

A. Lenz’s law
B. Faraday’s equation
C. Ohm’s law
D. Larmor equation

A

D. Larmor equation

28
Q

T1 and T2 relaxation are independent processes

True or false?

A

True

29
Q

T1 and T2 relaxation are dependent upon each other

True or false?

A

False

30
Q

In which of the following compounds does hydrogen experience the shortest T1 relaxation time?

A. Fat
B. Water
C. CSF
D. Muscle

A

A. Fat

31
Q

In which of the following compounds does hydrogen experience the shortest T2 relaxation time?

A. Fat
B. Water
C. CSF
D. Muscle

A

A. Fat

32
Q

What is the contrast weighting of the following image: TR = 500 ms; TE = 20 ms

A. T1 contrast weighting
B. T2 contrast weighting
C. Proton density contrast weighting
D. Not enough info

A

A. T1 contrast weighting

33
Q

What is the contrast weighting of the following image: TR = 2000 ms; TE = 80 ms

A. T1 contrast weighting
B. T2 contrast weighting
C. Proton density contrast weighting
D. Not enough info

A

B. T2 contrast weighting

34
Q

What is the contrast weighting of the following image: TR = 2000 ms; TE = 20 ms

A. T1 contrast weighting
B. T2 contrast weighting
C. Proton density contrast weighting
D. Not enough info

A

C. Proton density contrast weighting

35
Q

RF energy deposited into the patient is controlled by the:

A. TE
B. FOV
C. Flip angle
D. Coherent magnetization

A

C. Flip angle

36
Q

The most commonly used isotope of hydrogen used in MRI is:

A. Protium
B. Deuterium
C. Tritium
D. None of these

A

A. Protium

Physics (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions