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NUCMED > NUCMED > Flashcards

NUCMED Flashcards

1
Q

Radiolabeled compound used in nuclear medicine.
a. Tracers
b. Radiotracers
c. Radiopharmaceuticals
d. All of the choices

A

D

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2
Q

True about nuclear medicine.
a. Produce transmission images
b. Produce planar images only
c. Form of functional imaging
d. Utilize non-ionizing radiation

A

C

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3
Q

Commonly used radionuclide in nuclear medicine.
a. 123 I
b. 99mTc
c. 11C
d. 32P

A

B

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4
Q

Which of the following can generate tomographic images?
a. CT scan
b. SPECT
c. PET
d. All of the choices

A

D

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5
Q

Who invented the cyclotron?
a. Paul Harper
b. Ernest Lawrence
c. Georg de Hevesy
d. Marie Curie

A

B

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6
Q

All of the following are base quantity except:
a. m
b. sec
c. kg
d. m/s2

A

D

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7
Q

Miniature solar system atomic model.
a. Medieval atom
b. Bohr atom
c. Dalton atom
d. Thomson

A

B

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8
Q

True about gamma ray:
I. electromagnetic energy
II. no charge
III. no mass
IV. travel in velocity of light in a vacuum
a. I & IV
b. I, II & III
c. I,III & IV
d. I,II,III,IV

A

D

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9
Q

Standard system of units based on the meter, the kilogram, and the second.
a. SI
b. Customary unit
c. Traditional unit
d. Derived

A

A

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10
Q

Fast moving electron is an example of:
a. EMR
b. Particulate radiation
c. Electromagnetic
d. Wave

A

B

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11
Q

Decay mode that results of emission of gamma radiation without the emission or capture of a particle by the nucleus.
a. beta minus decay
b. electron capture
c. isomeric transition
d. negatron decay

A

C

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12
Q

The process by which radionuclides spontaneously emits particles and energy to reach stability. a. Radioactive decay
b. half life
c. Radioactive disintegration d. choices a & b

A

A,C

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13
Q

A proton inside the nucleus is converted into a neutron, and the excess energy is emitted as a positively charge electron and a neutrino.
a. alpha decay
b. beta plus decay
c. beta minus decay
d. isomeric transition

A

B

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14
Q

Lowest energy state of nucleus and the most stable nuclear arrangement.
a. Isomeric state
b. Metastable
c. Isobaric state
d. Ground state

A

D

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15
Q

Atoms that have the same number of neutrons but different atomic numbers.
a. isotones
b. isobars
c. isotopes
d. isomers

A

A

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16
Q

The rate of clearance of the radiopharmaceutical from the body is called:
a. biologic half-life
b. radioactive half-life
c. physical half-life
d. effective half-life

A

A

17
Q

How many half-lives are required before a quantity of radioactive material has decayed to 25 % of its original value? a. 1
b. 2
c. 3
d. 4

A

B

18
Q

131I has a half-life of 8 days. If there are 400 grams of this sample, how much of 131I will remain after 24 days. a. 50 grams
b. 200 grams
c. 800 grams
d. 100 grams

A

A

19
Q

Time required for a radioisotope to decay to half its original activity.
a. biologic half-life
b. rad half-life
c. physical half-life
d. effective half-life

A

C

20
Q

It is the time required for one-half of the initial radioactivity to disappear from an organ or the body both by excretion and by physical decay.
a. biologic half-life
b. radioactive half-life
c. physical half-life
d. effective half-life

A

A

21
Q

Occur when charged particles lose energy by interacting with orbital electrons in the medium. I. Ionization
II. Excitation
III. Bremsstrahlung
a. I-II
b. I-II-III
c. I only
d. III only

A

C

22
Q

Which of the following has the lowest penetrability but highly ionizing?
a. Alpha particle
b. Beta particle
c. Electron
d. Electromagnetic radiation

A

A

23
Q

Which of the following particles tend to travels in straight lines?
a. Electrons
b. Beta particles
c. Alpha particles
d. Negatron

A

A

24
Q

When a charged particle travels in a medium at a speed greater than the speed of light in that medium. a. Diffraction effect
b. Annihilation interaction
c. Cherenkov effect
d. Fission

A

C

25
Q

Occur when the energy transferred to an electron does not exceed its binding energy.
a. Characteristic x-ray
b. Bremsstrahlung x-ray
c. Ionization
d. Excitation

A

C

26
Q

Special case of compton effect if the photon is scattered right angle to its original direction and the angle of electron emission depends on the energy.
a. Direct hit
b. Grazing hit
c. 90 degrees scatter
d. backscattering

A

C

27
Q

Special case of Compton effect when the electron travel forward and the scattered photon travels backward. a. Direct hit
b. Grazing hit
c. 90 degrees scatter
d. 45 decrees scatter

A

A

28
Q

Particles involve in annihilation interaction.
b. Proton and neutron
c. Positron and proton
d. Positron and electron
e. Negatron and electron

A

D

29
Q
  1. Minimum energy required for pair production. a. 511 keV
    b. 1.02 keV
    c. 1.02 MeV
    d. 511 keV
A

C

30
Q

True about photoelectric effect.
a. production of scattered radiation
b. Photon-outer shell interaction
c. Ionization of inner shell electron
d. All of the choices

A

A

31
Q

Which of the following instruments should be used to locate a lost radioactive source or detect low-level radioactive contamination?
a. GM detector
b. Proportional counter
c. Ionization chamber-type survey meter (cutie pie)
d. Scintillation detector

A

A

32
Q

Which of the following instruments is used to calibrate radiographic and fluoroscopic x-ray equipment? a. Proportional counter
b. GM detector
c. Ionization chamber with electrometer
d. Pocket ionization chamber

A

C

33
Q

How does a GM detector alert the operator to the presence of ionizing radiation?
a. Light indicator
b. Audible sound
c. Vibration
d. None of the choices

A

B

34
Q

Electron emission after light stimulation.
a. Thermionic emission
b. Fluorescence
c. Photoemission
d. Phosphorescence

A

C

35
Q

All of the following statement are correct EXCEPT:
a. The ionization of gas is the basis for gas-filled radiation detectors.
b. A photocathode is a device that emits light when illuminated.
c. Types of gas-filled radiation survey instruments include the ionization chamber-type survey meter (cutie pie), the proportional counter, and the GM detector.
d. Radiation survey instruments for area monitoring must be durable and easy to carry.

A

B

NUCMED (1 decks)

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