RSC287- Final Exam QUESTIONS AND ANSWERS LATEST UPDATE
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Course
RSC287
Institution
RSC287
RSC287- Final Exam QUESTIONS AND ANSWERS LATEST UPDATE
Which of the following radiation quantities is intended to be the best overall measure of the biologic effects of ionizing radiation
effective dose
The term as low as reasonable achievable (ALARA) is synonymous with the term
Optimizatio...
RSC287- Final Exam QUESTIONS AND
ANSWERS LATEST UPDATE
Which of the following radiation quantities is intended to be the best overall
measure of the biologic effects of ionizing radiation
effective dose
The term as low as reasonable achievable (ALARA) is synonymous with the term
Optimization for radiation protection
Which of the following sources of radiation is human-made?
1. atmospheric fallout from nuclear weapons testing
2. cosmic radiation from the sun and beyond the solar system
3. nuclear power plant accidents as a consequence of natural disasters
1 and 3 only
Consequences of ionization in human cells include
1. creation of unstable atoms.
2. production of free electrons.
3. creation of highly reactive free radicals capable of producing substances
poisonous to the cell.
4. creation of new biologic molecules detrimental to the living cell.
5. injury to the cell that may manifest itself as abnormal function or loss of
function.
all the options
during the process of coherent scattering, an accident low energy xray photon
interacts with
an atom and may transfer its energy causing some or all of the electrons of the atom to
momentarily vibrate and radiate in the form of electromagnetic waves
The advantages of the BERT method are:
1. it does not imply radiation risk; it is simply a means for comparison.
,2. it emphasizes that radiation is an innate part of our environment.
3. the answer given in terms of BERT is easy for the patient to comprehend.
all the options
Which of the following radiation quanities use the same unit of measure
effective dose and equivalent dose
The x-ray photon energy required to initiate pair production is:
1.022 MeV
Electromagnetic radiation travels or propagates through space in the form of a
wave but can interact with matter as a particle of energy called a photon. This
dual nature is referred to as
wave-particle duality
If two anatomic structures have the same density and atomic number but one is
twice as thick as the other, the thicker structure will absorb
twice as many x-ray photons
Which of the following interactions result in the conversion matter into energy
Annihilation Reaction
The ALARA principle provides a method for comparing the amount of radiation
used in various health care facilities in a particular area for specific imaging
procedures. This information may be helpful to many
regulatory agencies
Which of the following are by-products of photoelectric absorption
photoelectron and characteristic photon
Radiology departments or individual radiologic technologists can "pledge" to
image gently. The pledge includes which of the following?
1. Make the image gently message a priority in staff communications each year.
2. Review the protocol recommendations and, when necessary, implement
adjustments to practice processes.
3. Communicate openly with parents.
all of the options
The milisievert is equal to
1/1000 of a sievert
, Two cGy equals
0.02 Gy
Typically, people are more willing to accept a risk if they percieve that the
potiential benefit to be obtained is
greater than the risk involved
Why is a question concerning the amount of radiation a patient will receive during
a specific x-ray procedure difficult to answer?
1. Because the received dose is specified in a number of different units of
measure2. Because the scientific units for radiation dose are normally not
comprehensible by a patient3. Because the patient should not receive any
information about radiation dose
1 and 2 only
The symbol Z indicates
atomic number of an atom
energy associated with electromagnetic radiation that have neither mass nor
electric charge and travel at the speed of light are
photons
If a patient asks a radiographer a question about how much radiation he or she
will receive from a specific x-ray procedure, the radiographer can
respond by using an estimation based on the comparison of radiation received by the x-
ray to natural background radiation received
In the electromagnetic spectrum, higher frequencies are associated with
shorter wavelength and higher energies
Terrestrial radiation includes which of the following sources?
Long-lived radioactive elements such as uranium-238, radium-226, and thorium-232
that are present in variable quantities in the crust of the earth
which of the following provides the basis for determining whether an imaging
procedure or practice is justified
diagnostic efficacy
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