RTE 2563 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
What is the result of coherent scattering - Answers - Usually just a small angle change
in the direction of the incident photon
A technical exposure factor of 100 kVp means that the electrons bombarding the target
have a max. energy of - Answers - 1,000,000 eV or 1000 keV
A compton scattered electron - Answers - Is absorbed within a few microns of the site of
the original Compton interaction
What best described mass density? - Answers - it is measured in grams per cubic meter
Which interactions with x-ray and biologic matter occur above the diagnostic range? -
Answers - pair production & photodisintegration
small-angle scatter - Answers - degrades the appearance of a completed radiographic
image by blurring the sharp outlines of dense structures
What has the same mass and magnitude of charge as a negatron? - Answers - positron
What are three unstable nuclei used in PET - Answers - fluorine, carbon, nitrogen
What was used as the first measure of exposure for ionizing radiation - Answers - skin
erythema
What is the unit of collective effective does (ColEfD)? - Answers - person-sievert
What radiaiton unit does coloumb/kg measure? - Answers - radiation exposure in air
only
What radiation quantity accounts for some biologic tissues being more radiosensitive
than others? - Answers - effective dose
How is the SI unit for DAP usually specified? - Answers - mGy-cm
Which term describes the amount of energy per unit mass transferred from an x-ray
beam to an object in its path such as the human body? - Answers - absorbed dose
The product of air kerma multiplied by the exposed area of the patient is - Answers -
DAP
Fluoro patient entrance radiation is specified in - Answers - mGy/min
, The whole-body TEDE limit for exposed personnel is?
for the general public? - Answers - 0.05 Sv; 0.001 Sv
What unit replaced tolerance dose for radiation protection purposes in the 1950s? -
Answers - maximum permissable dose
Personnel dosimeter - Answers - Provides an indication of the working habits and
working conditions of diagnostic imaging personnel
Personnel monitoring report - Answers - Lists the deep, eye, and shallow occupational
exposures of each person in a health care facility as measured by the exposed monitor
radiation survey instruments - Answers - Specific gas-filled radiation detectors that
detect the presence of radiation and, when properly calibrated, give a reasonably
accurate measurement of the exposure.
OSL - Answers - device used for personnel monitoring of occupational exposure that
contains an Al2O3 detector
Second personnel monitoring device worn beneath a protective apron at waist level -
Answers - worn by a pregnant radiographer to monitor the equivalent dose to the
embryo
GM survey meter - Answers - device with audible sound system that alerts the operator
to the presence of ionizing radiation
Control Monitor - Answers - Serves as a basis for comparison with the remaining OSL
badges after they have been returned to the monitoring company for processing
proportional counter - Answers - Generally used in a laboratory setting to detect alpha
and beta radiation and small amounts of other types of low level radioactive
contamination
personnel DIS dosimeter - Answers - a small ionization gas-filled dosimeter connected
to a solid state device with electrically erasable read only memory EEPROM
ionization chamber connected to an electrometer - Answers - used by medical
physicists to perform annual standard measurements required by state, federal, and
health care accreditation organizations for radiographic and fluoroscopic devices
glow curve - Answers - A graphic plot that demonstrates the relationship of light output,
or emitted thermoluminescence intensity, to temperature variation
check source - Answers - a weak, long lived radioisotope located on one side of the
external surface of a GM detector that is used to verify its consistency daily
ANSWERS
What is the result of coherent scattering - Answers - Usually just a small angle change
in the direction of the incident photon
A technical exposure factor of 100 kVp means that the electrons bombarding the target
have a max. energy of - Answers - 1,000,000 eV or 1000 keV
A compton scattered electron - Answers - Is absorbed within a few microns of the site of
the original Compton interaction
What best described mass density? - Answers - it is measured in grams per cubic meter
Which interactions with x-ray and biologic matter occur above the diagnostic range? -
Answers - pair production & photodisintegration
small-angle scatter - Answers - degrades the appearance of a completed radiographic
image by blurring the sharp outlines of dense structures
What has the same mass and magnitude of charge as a negatron? - Answers - positron
What are three unstable nuclei used in PET - Answers - fluorine, carbon, nitrogen
What was used as the first measure of exposure for ionizing radiation - Answers - skin
erythema
What is the unit of collective effective does (ColEfD)? - Answers - person-sievert
What radiaiton unit does coloumb/kg measure? - Answers - radiation exposure in air
only
What radiation quantity accounts for some biologic tissues being more radiosensitive
than others? - Answers - effective dose
How is the SI unit for DAP usually specified? - Answers - mGy-cm
Which term describes the amount of energy per unit mass transferred from an x-ray
beam to an object in its path such as the human body? - Answers - absorbed dose
The product of air kerma multiplied by the exposed area of the patient is - Answers -
DAP
Fluoro patient entrance radiation is specified in - Answers - mGy/min
, The whole-body TEDE limit for exposed personnel is?
for the general public? - Answers - 0.05 Sv; 0.001 Sv
What unit replaced tolerance dose for radiation protection purposes in the 1950s? -
Answers - maximum permissable dose
Personnel dosimeter - Answers - Provides an indication of the working habits and
working conditions of diagnostic imaging personnel
Personnel monitoring report - Answers - Lists the deep, eye, and shallow occupational
exposures of each person in a health care facility as measured by the exposed monitor
radiation survey instruments - Answers - Specific gas-filled radiation detectors that
detect the presence of radiation and, when properly calibrated, give a reasonably
accurate measurement of the exposure.
OSL - Answers - device used for personnel monitoring of occupational exposure that
contains an Al2O3 detector
Second personnel monitoring device worn beneath a protective apron at waist level -
Answers - worn by a pregnant radiographer to monitor the equivalent dose to the
embryo
GM survey meter - Answers - device with audible sound system that alerts the operator
to the presence of ionizing radiation
Control Monitor - Answers - Serves as a basis for comparison with the remaining OSL
badges after they have been returned to the monitoring company for processing
proportional counter - Answers - Generally used in a laboratory setting to detect alpha
and beta radiation and small amounts of other types of low level radioactive
contamination
personnel DIS dosimeter - Answers - a small ionization gas-filled dosimeter connected
to a solid state device with electrically erasable read only memory EEPROM
ionization chamber connected to an electrometer - Answers - used by medical
physicists to perform annual standard measurements required by state, federal, and
health care accreditation organizations for radiographic and fluoroscopic devices
glow curve - Answers - A graphic plot that demonstrates the relationship of light output,
or emitted thermoluminescence intensity, to temperature variation
check source - Answers - a weak, long lived radioisotope located on one side of the
external surface of a GM detector that is used to verify its consistency daily
