Vet tech exam 3 with precise detailed
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solutions
Radiographs are produced within the x-ray tube using the _______-charged | | | | | | | | | |
cathode and the _______-charged anode. - Correct answer ✔negative; positive
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Which of the following radiograph exposure factors is involved with controlling
| | | | | | | | | | |
the number of x-rays that are produced to allow enough to reach the film
| | | | | | | | | | | | | |
cassette? - Correct answer ✔Milliamperage | | | |
Which of the following radiograph exposure factors involves how far or close
| | | | | | | | | | | |
the x-ray tube is from the surface of the x-ray detector? - Correct answer ✔Focal-
| | | | | | | | | | | | | |
film distance
|
This piece of equipment is used to scavenge scatter radiation and allow for
| | | | | | | | | | | | |
higher-quality films with less undesired radiation exposure. - Correct answer | | | | | | | | | |
✔Grid
What is the primary advantage of digital radiography in comparison to film-
| | | | | | | | | | |
based methods? - Correct answer ✔Decreased retakes
| | | | | |
The use of the Internet has allowed for collaboration between veterinarians and
| | | | | | | | | | | |
radiologists through the transmission of electronic images. This activity is
| | | | | | | | | |
called - Correct answer ✔teleradiology
| | | |
,This type of x-ray intensifying screen is characterized as requiring lowered
| | | | | | | | | | |
amounts of radiation to produce an image, but often results in images of
| | | | | | | | | | | | |
diminished detail. - Correct answer ✔Fast | | | | |
X-rays are a form of electromagnetic radiation that have characteristics similar
| | | | | | | | | | |
to visible light, radio signals, and television signals, but with a much
| | | | | | | | | | | |
___________ wavelength, thus giving the x-ray beam more energy in | | | | | | | | | |
comparison to visible light. - Correct answer ✔Shorter | | | | | | |
The ______________ that is applied to the filament in an x-ray tube determines
| | | | | | | | | | | | |
the number of electrons that are produced. - Correct answer ✔Amount of heat
| | | | | | | | | | | |
The filament inside an x-ray tube is much like the filament on the inside of a
| | | | | | | | | | | | | | | |
light bulb. It is made of a _________________________. - Correct answer
| | | | | | | | | | |
✔tungsten alloy |
The acceleration of electrons in an x-ray tube is controlled by the
| | | | | | | | | | | |
_________________ applied between the cathode and the anode. - Correct | | | | | | | | | |
answer ✔kilovoltage peak (kVp) | | |
Why is a vacuum environment required for an x-ray tube? - Correct answer ✔So
| | | | | | | | | | | | |
the x-rays can move fast
| | | | |
Using a small (11 degree) angle for the target in an x-ray tube allows for a
| | | | | | | | | | | | | | | |
narrower beam and ________________. - Correct answer ✔more image detail
| | | | | | | | |
,When using x-ray units that have stationary anodes, such as those found in
| | | | | | | | | | | | |
dental equipment, technicians must pay close attention to the indicators on the
| | | | | | | | | | | |
machine to ensure ______________________. - Correct answer ✔enough heat
| | | | | | | | |
has dissipated between exposures
| | |
Rotating anode x-ray machines have a two-step exposure switch. The first step
| | | | | | | | | | | |
of the switch _______________, and the second step of the switch activates the
| | | | | | | | | | | | |
high-voltage circuit, accelerating the electrons across the tube, allowing for x-
| | | | | | | | | |
ray production. - Correct answer ✔starts the anode rotating
| | | | | | | |
Always place the ___________________ of the area being x-rayed toward the
| | | | | | | | | | |
cathode side of the x-ray tube. - Correct answer ✔Thickest part
| | | | | | | | | |
_____________ is lower-energy x-ray photons that have undergone a change in | | | | | | | | | | |
direction after interacting with structures in the patient's body or anything else
| | | | | | | | | | | |
in the path of the primary beam. - Correct answer ✔Scatter radiation
| | | | | | | | | | |
Which of the following statements regarding portable x-ray units is the least
| | | | | | | | | | | |
accurate? - Correct answer ✔Most have a rotating anode. | | | | | | | |
The veterinary technician is responsible for selecting an x-ray technique that
| | | | | | | | | | |
will produce a diagnostic-quality radiograph. Factors that must be selected
| | | | | | | | | |
include all of the following except - Correct answer ✔frequency of wavelength.
| | | | | | | | | | |
Since both exposure time and milliamperage affect the number of photons
| | | | | | | | | | |
created, you should always use the __________ milliamperage setting and the
| | | | | | | | | | |
, ______________ time setting to arrive at the desired mAs. - Correct answer | | | | | | | | | | | |
✔highest; lowest |
Using _______ settings produces a higher-contrast image (more black and
| | | | | | | | | |
white in appearance with few grays) because the beam is more discriminating. -
| | | | | | | | | | | | |
Correct answer ✔low kVp | | |
___________ setting is used more for affecting the scale of contrast on a | | | | | | | | | | | | |
radiograph than for controlling the density. - Correct answer ✔The kilovoltage
| | | | | | | | | | |
peak
In radiography, technique refers to - Correct answer ✔the exposure factors that
| | | | | | | | | | | |
are set to take a radiograph
| | | | |
The technician can change the density of the image by adjusting either the ____
| | | | | | | | | | | | |
(total number of x-ray photons) or the _____ (energy of the x-ray). - Correct
| | | | | | | | | | | | | | |
answer ✔mAs; kVp | |
What is the equation that is used to estimate the amount of kVp needed to
| | | | | | | | | | | | | | |
produce a diagnostic-quality x-ray image for a given thickness of tissue? -
| | | | | | | | | | | |
Correct answer ✔(2 × thickness of tissue in cm) + distance = kVp
| | | | | | | | | | | |
The inverse square law states that the intensity of the x-ray beam at a given
| | | | | | | | | | | | | | |
point is inversely proportional to the square of the distance from the x-ray
| | | | | | | | | | | | |
source. Therefore, the results of changing the focal-film distance are similar to
| | | | | | | | | | | |
changing the _______. - Correct answer ✔mAs | | | | | |
| | | | | | |
solutions
Radiographs are produced within the x-ray tube using the _______-charged | | | | | | | | | |
cathode and the _______-charged anode. - Correct answer ✔negative; positive
| | | | | | | | |
Which of the following radiograph exposure factors is involved with controlling
| | | | | | | | | | |
the number of x-rays that are produced to allow enough to reach the film
| | | | | | | | | | | | | |
cassette? - Correct answer ✔Milliamperage | | | |
Which of the following radiograph exposure factors involves how far or close
| | | | | | | | | | | |
the x-ray tube is from the surface of the x-ray detector? - Correct answer ✔Focal-
| | | | | | | | | | | | | |
film distance
|
This piece of equipment is used to scavenge scatter radiation and allow for
| | | | | | | | | | | | |
higher-quality films with less undesired radiation exposure. - Correct answer | | | | | | | | | |
✔Grid
What is the primary advantage of digital radiography in comparison to film-
| | | | | | | | | | |
based methods? - Correct answer ✔Decreased retakes
| | | | | |
The use of the Internet has allowed for collaboration between veterinarians and
| | | | | | | | | | | |
radiologists through the transmission of electronic images. This activity is
| | | | | | | | | |
called - Correct answer ✔teleradiology
| | | |
,This type of x-ray intensifying screen is characterized as requiring lowered
| | | | | | | | | | |
amounts of radiation to produce an image, but often results in images of
| | | | | | | | | | | | |
diminished detail. - Correct answer ✔Fast | | | | |
X-rays are a form of electromagnetic radiation that have characteristics similar
| | | | | | | | | | |
to visible light, radio signals, and television signals, but with a much
| | | | | | | | | | | |
___________ wavelength, thus giving the x-ray beam more energy in | | | | | | | | | |
comparison to visible light. - Correct answer ✔Shorter | | | | | | |
The ______________ that is applied to the filament in an x-ray tube determines
| | | | | | | | | | | | |
the number of electrons that are produced. - Correct answer ✔Amount of heat
| | | | | | | | | | | |
The filament inside an x-ray tube is much like the filament on the inside of a
| | | | | | | | | | | | | | | |
light bulb. It is made of a _________________________. - Correct answer
| | | | | | | | | | |
✔tungsten alloy |
The acceleration of electrons in an x-ray tube is controlled by the
| | | | | | | | | | | |
_________________ applied between the cathode and the anode. - Correct | | | | | | | | | |
answer ✔kilovoltage peak (kVp) | | |
Why is a vacuum environment required for an x-ray tube? - Correct answer ✔So
| | | | | | | | | | | | |
the x-rays can move fast
| | | | |
Using a small (11 degree) angle for the target in an x-ray tube allows for a
| | | | | | | | | | | | | | | |
narrower beam and ________________. - Correct answer ✔more image detail
| | | | | | | | |
,When using x-ray units that have stationary anodes, such as those found in
| | | | | | | | | | | | |
dental equipment, technicians must pay close attention to the indicators on the
| | | | | | | | | | | |
machine to ensure ______________________. - Correct answer ✔enough heat
| | | | | | | | |
has dissipated between exposures
| | |
Rotating anode x-ray machines have a two-step exposure switch. The first step
| | | | | | | | | | | |
of the switch _______________, and the second step of the switch activates the
| | | | | | | | | | | | |
high-voltage circuit, accelerating the electrons across the tube, allowing for x-
| | | | | | | | | |
ray production. - Correct answer ✔starts the anode rotating
| | | | | | | |
Always place the ___________________ of the area being x-rayed toward the
| | | | | | | | | | |
cathode side of the x-ray tube. - Correct answer ✔Thickest part
| | | | | | | | | |
_____________ is lower-energy x-ray photons that have undergone a change in | | | | | | | | | | |
direction after interacting with structures in the patient's body or anything else
| | | | | | | | | | | |
in the path of the primary beam. - Correct answer ✔Scatter radiation
| | | | | | | | | | |
Which of the following statements regarding portable x-ray units is the least
| | | | | | | | | | | |
accurate? - Correct answer ✔Most have a rotating anode. | | | | | | | |
The veterinary technician is responsible for selecting an x-ray technique that
| | | | | | | | | | |
will produce a diagnostic-quality radiograph. Factors that must be selected
| | | | | | | | | |
include all of the following except - Correct answer ✔frequency of wavelength.
| | | | | | | | | | |
Since both exposure time and milliamperage affect the number of photons
| | | | | | | | | | |
created, you should always use the __________ milliamperage setting and the
| | | | | | | | | | |
, ______________ time setting to arrive at the desired mAs. - Correct answer | | | | | | | | | | | |
✔highest; lowest |
Using _______ settings produces a higher-contrast image (more black and
| | | | | | | | | |
white in appearance with few grays) because the beam is more discriminating. -
| | | | | | | | | | | | |
Correct answer ✔low kVp | | |
___________ setting is used more for affecting the scale of contrast on a | | | | | | | | | | | | |
radiograph than for controlling the density. - Correct answer ✔The kilovoltage
| | | | | | | | | | |
peak
In radiography, technique refers to - Correct answer ✔the exposure factors that
| | | | | | | | | | | |
are set to take a radiograph
| | | | |
The technician can change the density of the image by adjusting either the ____
| | | | | | | | | | | | |
(total number of x-ray photons) or the _____ (energy of the x-ray). - Correct
| | | | | | | | | | | | | | |
answer ✔mAs; kVp | |
What is the equation that is used to estimate the amount of kVp needed to
| | | | | | | | | | | | | | |
produce a diagnostic-quality x-ray image for a given thickness of tissue? -
| | | | | | | | | | | |
Correct answer ✔(2 × thickness of tissue in cm) + distance = kVp
| | | | | | | | | | | |
The inverse square law states that the intensity of the x-ray beam at a given
| | | | | | | | | | | | | | |
point is inversely proportional to the square of the distance from the x-ray
| | | | | | | | | | | | |
source. Therefore, the results of changing the focal-film distance are similar to
| | | | | | | | | | | |
changing the _______. - Correct answer ✔mAs | | | | | |
