GXMO REVIEW QUESTIONS AND
ANSWERS 100% CORRECT
The American Registry of Radiologic Technologists (ARRT) was put in place to -
ANSWER-established standards and examinations to certify technologists. and
maintains a lists of registered technologists.
The American Society of Radiologic Technologists (ASRT) are a - ANSWER-
Professional organization continuing education promoting research and guidelines for
radiography instruction
The A.L.A.R.A concept.... - ANSWER-1. All exposure must have a benefit
2. All exposures ALARA
3. Dose levels should remain below
4. Maximum allowed
5. (Ten Commandments)
Position patient and equipment for procedure (Digital) - ANSWER-positions patient body
part
positions image receptor
positions x-ray machine
Apply lead shielding to protect patient
What are some of the duties of a limited radiography+ - ANSWER-Evaluate
radiographic images and send to physician for interpretation
Ensure that all anatomy is included
ensure image is of acceptable quality
Thank the patient and give final instruction
escort patient to exit
A limited radiographer operates in what manner - ANSWER-operates in an ethical and
legal environment based upon the health care worker- patient relationship
being considerate, respectful, and maintaining patients privacy
What is a Control panel - ANSWER-The portion of the x-ray unit that contains the
master switch, the indicator light, the selector buttons, and the exposure button.
The light box helps by doing what - ANSWER-marking films after exposure but before
processing
What form does some radiation go through the patient - ANSWER-absorbed, scattered,
transmitted
,Image receptor is what kind of devices - ANSWER-The device that receives the energy
of the x-ray beam and forms the image of the body part
Scatter radiation ( on a x-ray table) is what - ANSWER-A form of secondary radiation
that occurs when an x-ray beam has been deflected from its path by interaction with
matter is called
Digital systems operate at what speed class? - ANSWER-have a much wider dynamic
range (latitude) than film screen systems resulting in fewer retakes
What is a range of exposures the imaging system can receive and render as an image
tone # - ANSWER-digital receptors
What does digitization / to digitize do - ANSWER--assign a number to each pixel-assign
a shade of grey to each number
What has continuous variation with infinite possible values - ANSWER-analog
information
What is a area of unsharpness at each image border due to focal spot source of
radiation.i.e. soft tissues edges around # - ANSWER-penumbra
What is caused by movement of the x-ray tube, the pt or IR during exposure-voluntary
and involuntary motion - ANSWER-motion unsharpness
If the increase in kVp what happen to attenuation # - ANSWER-it is decrease
What does differential attenuation mean - ANSWER-each tissue attenuates the beam
differently or absorb radiation differently
A variation in beam density as it passes thru pt is called what - ANSWER-subject
contrast
low contrast has many what colors - ANSWER-shades of gray instead of black and
white, -long scale
What does deviation index (DI) mean - ANSWER-variation from TEI (Target Exposure
Index) or the amount of underexposure or overexposure
What is meant by the exposure indicator - ANSWER-a numeric representation of the
quantity of exposure received by a digital image receptor, and tells you whether or not
the radiograph is over or under exposed
What is digital Imaging - ANSWER-a process through which a picture is converted into
a series of square electronic dots known as pixels
also a term is exposure indicator of the radiograph
,The number of protons in the xray beam / mAs are called - ANSWER-quantity
MA definition - ANSWER-quantity per sec
If a focal spot size is smaller you will get what # - ANSWER-better sharpness
What is 54 V through tube circuit makes 54,000 V (54kV) - ANSWER-transferring volts
x-ray (outgoing current) has what - ANSWER-high voltage: 110 kV
current: 100 mA
DC current
x-ray Incoming current are - ANSWER-low voltage: 110 V
current: 100 A
AC current
Low voltage circuit is control by what # - ANSWER-Control Panel/ control circuit
A full wave rectification system has - ANSWER-requires 4 diodes
produces twice as much radiation per second as half wave rectified system
main switch does what - ANSWER-the switch that generates the power to the x-ray tube
timer and exposure switch - ANSWER-Allows the electrons to flow from the cathode to
the anode for a specific period of time. it is located on the primary side of the high
voltage transformer. Mechanical.
Part which lets primary radiation leaves in all direction - ANSWER-the x-ray tube
What is the tube port - ANSWER-opening in protective housing allowing emission of
primary radiation (where useful x-ray exit)
what type of radiation is emitted through the protective tube housing - ANSWER-
Remnant radiation
What type of radiation is emitted through the Protective Tube Housing? - ANSWER-
Leakage
How does attenuation effect x-rays - ANSWER-the x-ray beam decrease in intensity as
it passes through the patient due to absorption and scatter
attenuation meaning - ANSWER-the process of reduction, such as the attenuation of an
x-ray beam by reducing its intensity, the weakening of the degree of virulence of a
disease organism, or culturing under unfavorable conditions.
, x-rays are absorbed, scattered, transmitted through who # - ANSWER-the patient
remnant (transmitted primary radiation) radiation and forms latent (hidden) image -
ANSWER-The (IR) Image receptor receives
exits x-rays tube via tube port directed toward patient - ANSWER-What is the primary
radiation #
emitted in all directions from the patient and x-rays - ANSWER-What is scatter radiation
transmitted primary radiation directed toward the image receptor. (is scatter and
transmitted radiation) - ANSWER-What is remnant radiation
Leakage radiation is emitted in all directions form the x-ray tube housing is called -
ANSWER-secondary radiation
emitted in all directions from the patient hand x-ray table - ANSWER-scatter radiation
What contribute to patient and operator radiation dose # - ANSWER-Secondary and
scatter radiation
degrades the image - ANSWER-Scatter radiation does what to a image
Primary radiation has greater energy (Penetration) - ANSWER-than scatter or leakage
Useful beam is emitted directly from the s-ray tube toward the patient and image
receptor called - ANSWER-primary radiation
Secondary radiation is also called # - ANSWER-leakage and scatter radiation
Leakage radiation passes through - ANSWER-protective tube housing
scatter radiation is generated from - ANSWER-the patient and other structures
encountered by the primary beam
The lead lined(expect at port) protective housing is called - ANSWER-tube housing
The opening in tube housing to allow primary beam to exit is called - ANSWER-tube
port
The area of the beam that strikes patient usually visualized with x-ray field light is called
- ANSWER-radiation field
The center of primary radiation field cross hair in light fields - ANSWER-central ray
ANSWERS 100% CORRECT
The American Registry of Radiologic Technologists (ARRT) was put in place to -
ANSWER-established standards and examinations to certify technologists. and
maintains a lists of registered technologists.
The American Society of Radiologic Technologists (ASRT) are a - ANSWER-
Professional organization continuing education promoting research and guidelines for
radiography instruction
The A.L.A.R.A concept.... - ANSWER-1. All exposure must have a benefit
2. All exposures ALARA
3. Dose levels should remain below
4. Maximum allowed
5. (Ten Commandments)
Position patient and equipment for procedure (Digital) - ANSWER-positions patient body
part
positions image receptor
positions x-ray machine
Apply lead shielding to protect patient
What are some of the duties of a limited radiography+ - ANSWER-Evaluate
radiographic images and send to physician for interpretation
Ensure that all anatomy is included
ensure image is of acceptable quality
Thank the patient and give final instruction
escort patient to exit
A limited radiographer operates in what manner - ANSWER-operates in an ethical and
legal environment based upon the health care worker- patient relationship
being considerate, respectful, and maintaining patients privacy
What is a Control panel - ANSWER-The portion of the x-ray unit that contains the
master switch, the indicator light, the selector buttons, and the exposure button.
The light box helps by doing what - ANSWER-marking films after exposure but before
processing
What form does some radiation go through the patient - ANSWER-absorbed, scattered,
transmitted
,Image receptor is what kind of devices - ANSWER-The device that receives the energy
of the x-ray beam and forms the image of the body part
Scatter radiation ( on a x-ray table) is what - ANSWER-A form of secondary radiation
that occurs when an x-ray beam has been deflected from its path by interaction with
matter is called
Digital systems operate at what speed class? - ANSWER-have a much wider dynamic
range (latitude) than film screen systems resulting in fewer retakes
What is a range of exposures the imaging system can receive and render as an image
tone # - ANSWER-digital receptors
What does digitization / to digitize do - ANSWER--assign a number to each pixel-assign
a shade of grey to each number
What has continuous variation with infinite possible values - ANSWER-analog
information
What is a area of unsharpness at each image border due to focal spot source of
radiation.i.e. soft tissues edges around # - ANSWER-penumbra
What is caused by movement of the x-ray tube, the pt or IR during exposure-voluntary
and involuntary motion - ANSWER-motion unsharpness
If the increase in kVp what happen to attenuation # - ANSWER-it is decrease
What does differential attenuation mean - ANSWER-each tissue attenuates the beam
differently or absorb radiation differently
A variation in beam density as it passes thru pt is called what - ANSWER-subject
contrast
low contrast has many what colors - ANSWER-shades of gray instead of black and
white, -long scale
What does deviation index (DI) mean - ANSWER-variation from TEI (Target Exposure
Index) or the amount of underexposure or overexposure
What is meant by the exposure indicator - ANSWER-a numeric representation of the
quantity of exposure received by a digital image receptor, and tells you whether or not
the radiograph is over or under exposed
What is digital Imaging - ANSWER-a process through which a picture is converted into
a series of square electronic dots known as pixels
also a term is exposure indicator of the radiograph
,The number of protons in the xray beam / mAs are called - ANSWER-quantity
MA definition - ANSWER-quantity per sec
If a focal spot size is smaller you will get what # - ANSWER-better sharpness
What is 54 V through tube circuit makes 54,000 V (54kV) - ANSWER-transferring volts
x-ray (outgoing current) has what - ANSWER-high voltage: 110 kV
current: 100 mA
DC current
x-ray Incoming current are - ANSWER-low voltage: 110 V
current: 100 A
AC current
Low voltage circuit is control by what # - ANSWER-Control Panel/ control circuit
A full wave rectification system has - ANSWER-requires 4 diodes
produces twice as much radiation per second as half wave rectified system
main switch does what - ANSWER-the switch that generates the power to the x-ray tube
timer and exposure switch - ANSWER-Allows the electrons to flow from the cathode to
the anode for a specific period of time. it is located on the primary side of the high
voltage transformer. Mechanical.
Part which lets primary radiation leaves in all direction - ANSWER-the x-ray tube
What is the tube port - ANSWER-opening in protective housing allowing emission of
primary radiation (where useful x-ray exit)
what type of radiation is emitted through the protective tube housing - ANSWER-
Remnant radiation
What type of radiation is emitted through the Protective Tube Housing? - ANSWER-
Leakage
How does attenuation effect x-rays - ANSWER-the x-ray beam decrease in intensity as
it passes through the patient due to absorption and scatter
attenuation meaning - ANSWER-the process of reduction, such as the attenuation of an
x-ray beam by reducing its intensity, the weakening of the degree of virulence of a
disease organism, or culturing under unfavorable conditions.
, x-rays are absorbed, scattered, transmitted through who # - ANSWER-the patient
remnant (transmitted primary radiation) radiation and forms latent (hidden) image -
ANSWER-The (IR) Image receptor receives
exits x-rays tube via tube port directed toward patient - ANSWER-What is the primary
radiation #
emitted in all directions from the patient and x-rays - ANSWER-What is scatter radiation
transmitted primary radiation directed toward the image receptor. (is scatter and
transmitted radiation) - ANSWER-What is remnant radiation
Leakage radiation is emitted in all directions form the x-ray tube housing is called -
ANSWER-secondary radiation
emitted in all directions from the patient hand x-ray table - ANSWER-scatter radiation
What contribute to patient and operator radiation dose # - ANSWER-Secondary and
scatter radiation
degrades the image - ANSWER-Scatter radiation does what to a image
Primary radiation has greater energy (Penetration) - ANSWER-than scatter or leakage
Useful beam is emitted directly from the s-ray tube toward the patient and image
receptor called - ANSWER-primary radiation
Secondary radiation is also called # - ANSWER-leakage and scatter radiation
Leakage radiation passes through - ANSWER-protective tube housing
scatter radiation is generated from - ANSWER-the patient and other structures
encountered by the primary beam
The lead lined(expect at port) protective housing is called - ANSWER-tube housing
The opening in tube housing to allow primary beam to exit is called - ANSWER-tube
port
The area of the beam that strikes patient usually visualized with x-ray field light is called
- ANSWER-radiation field
The center of primary radiation field cross hair in light fields - ANSWER-central ray
