Card Set Information
Rad. protection test 2
______ is most radio resistant.
The cytoplasm consist primarily of
How does the energy of a scattered photon compare with that of the incident photon?
What is the single largest source of natural background radiation?
To what height must in-wall secondary protective barriers extend?
To the ceiling
Thernoluminescent dodimeters use what type of crystals to record use?
As low-energy x-rays are removed from the beam, it becomes
What is the thickness of a lead apron that should be worn while being exposed to radiation?
.50 mm lead equivalent
The radiation dose that, if received by the entire population, would cause the same genetic injury as the total of doses received by the member actually being exposed is called
Genetically significant dose
samller bodies within the cytoplasms are called
For optimal radiation protection, what type of film-screen system should be used?
The traditional unit of dose equivalency is the
What is the annual effective absorbed dose equivalent limit for the general public(frequent exposure)?
Thermoluminescent dosimeters are heated and release what tyoe of energy to indicate dose.
What percent of human exposure is background radiation?
The photon-tissue interaction that results from very low energy x rays is
The photon tissue interaction that occurs when an outer shell electron is struck by an incident photon is
what is stochastic effect?
Increased dose equals increased probability of effects
How is damage to the cell being radiated described?
The greatest source of artificial exposure is from?
Diagnostic imaging procedures
When using a grid, radiation dose
A filter is placed in the xray beam to remove
long wavelengths rays
The annual effective absorbed dose equivalent limit for the general public, assuming infrequency exposure is
Genetic effects follow what type of dose-response curve?
Scattered photons emerging from the patient travel in what kind of paths?
Free radicals may recombine to form
examples of low-linear transfer (LET) radiations include
How dose the energy of a scattered photon compare with that of the incident photon?
Germ cell division is called
Most damage from exposure to radiation occur as a result of
Film badges are changed
The traditional unit of absorbed dose is the
How often is filtration adjusted by the radiographer
Medical and dental x-rays are examples of
human produced radiation
How may cell damage manifest?
Both as loss of function and as abnormal function
What describes increased dose equaling increased probability of effects?
The process of somatic cell division called
The photon-tissue interaction that produces scatter that exits the patient is
The secondary protective barrier must overlap the primary protective barrier by at least
What occurs when radiation transfers its energy to DNA
The SI unit for the REM is the
Paitent dose is recorded in
Differential absorption is a result of which photon tissue interaction
An area called that is used primarily by persons trained in radiation safety and wearing personnel monitoring devices?
The photon tissue interaction that does not occur in the diagnostic imaging is
The law of Bergonie and Tribondeau
Immature, undifferentiated and rapidly diving cells
The unit of radiation tht takes into account the different biological effects caused by different types of radiation is the
What occurs when radiation transfers its energy to the cytoplasm
for optimal radiation protection, what technique should be used?
High kvp low mas
Personal dosimetry report reads in _____ units
Rem or mrem
Which photon tissue interaction is responsible for producing radiographic contrast?
Walls that may be struck by scatter or leakage radiation require
secondary protective barriers
The photon-tissue interaction that results in absortion of all the energy of the incident photon is
The dose-response relationship starting no level of radiation can be considered completely safe and that the degree of response if directly proportional to the amount of radiation received in
The photon tissue interaction that occurs when an incident photon strikes a k-shell electron is