Xray-grids, Filters, And Radiation Interactions
Questions and Answers
- 1.
What would the grid ratio be with a height of 4cm and a width of .25cm?
- A.
16:1
- B.
12:1
- C.
8:1
- D.
5:1
Correct Answer
A. 16:1Explanation
The grid ratio is determined by dividing the height of the grid by the width of the grid. In this case, the height is 4cm and the width is 0.25cm. Dividing 4 by 0.25 gives us 16, so the grid ratio is 16:1.Rate this question:
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- 2.
The lead strips in a grid are made of
- A.
Lead
- B.
Aluminum
- C.
Plastic fibers
- D.
Aluminum and plastic
Correct Answer
A. LeadExplanation
ask AdrianRate this question:
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- 3.
The grid is coated with....
- A.
Aluminum
- B.
Titanium
- C.
Lead
- D.
Plastic
Correct Answer
A. AluminumExplanation
purple essentials pg 112Rate this question:
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- 4.
Grid frequency is the...
- A.
Number of grid lines per inch
- B.
Number of grid lines per centimeter
- C.
Number of interspaces
- D.
Number of lead strips
Correct Answer
A. Number of grid lines per inchExplanation
The correct answer is "number of grid lines per inch". Grid frequency refers to the number of grid lines present in a given area, specifically per inch. It is a measure of the density or spacing of the grid lines on a grid. The higher the grid frequency, the closer the grid lines are to each other, resulting in a finer grid pattern.Rate this question:
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- 5.
Why are linear grids more used in clinical applications?
- A.
Better for tube angling
- B.
Can handle more kvp
- C.
Has more lead strips
- D.
Has thicker lead strips
Correct Answer
A. Better for tube anglingExplanation
principles pg262Rate this question:
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- 6.
Inherent filtration is any filtration.....
- A.
Inside the tube and housing
- B.
Inside collimator
- C.
Outside the collimator
- D.
Inside tube housing and collimator
Correct Answer
A. Inside the tube and housingExplanation
Inherent filtration refers to the filtration that occurs naturally within the X-ray tube and housing. This means that as the X-ray beam passes through the tube and housing, some of the lower energy X-rays are absorbed, resulting in a beam with higher energy. This filtration helps to reduce patient dose and improve image quality by removing unnecessary low-energy X-rays. Therefore, the correct answer is inside the tube and housing.Rate this question:
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- 7.
Added filtration occurs where?
- A.
Outside the tube housing
- B.
Inside tube housing
- C.
Inside the bucky only
- D.
Inside the collimator only
Correct Answer
A. Outside the tube housingExplanation
Added filtration occurs outside the tube housing. This refers to the process of filtering out low-energy x-ray photons from the x-ray beam. It is done by placing filters, such as aluminum or copper, in the path of the x-ray beam before it reaches the patient. These filters absorb the low-energy photons, reducing patient dose and improving image quality. This type of filtration is typically added to the x-ray tube housing, rather than being built-in or occurring within other components of the x-ray system.Rate this question:
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- 8.
Compensation filters include which of the following (check all that apply)
- A.
Wedge
- B.
Trough
- C.
K-edge
- D.
Thoraeus
Correct Answer(s)
A. Wedge
B. TroughExplanation
Compensation filters are used in various imaging techniques to adjust for artifacts or distortions in the image. A wedge filter is commonly used to compensate for variations in X-ray beam intensity across the image, ensuring a more uniform exposure. On the other hand, a trough filter is used to compensate for variations in X-ray beam intensity along the length of the image, resulting in a more consistent image density. Therefore, both wedge and trough filters are examples of compensation filters. The other options, k-edge and thoraeus, are not commonly associated with compensation filters and are therefore not correct.Rate this question:
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- 9.
Filtration is also sometimes called what?
- A.
Hardening of the beam
- B.
Diverging of the beam
- C.
Softening of the beam
- D.
Strengthening of the beam
Correct Answer
A. Hardening of the beamExplanation
Filtration refers to the process of selectively removing certain wavelengths or energies from a beam of radiation. This process is commonly used in medical imaging to reduce the amount of scattered radiation and improve image quality. "Hardening of the beam" is a term sometimes used to describe this process, as it implies that the beam becomes more focused and concentrated after filtration.Rate this question:
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- 10.
Which type of interaction involves no energy transfer?
- A.
Coherent
- B.
Compton
- C.
Bremsstrahlung
- D.
Photoelectric
Correct Answer
A. CoherentExplanation
Coherent interaction involves no energy transfer. In this type of interaction, the incident photon interacts with an atom or molecule without transferring any energy. Instead, it causes the atom or molecule to vibrate or rotate, resulting in the emission of a photon with the same energy and frequency as the incident photon. This interaction is characterized by the absence of energy loss or gain, making it the only option among the given choices that involves no energy transfer.Rate this question:
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- 11.
What interaction involves a incident electron interacting with an inner shell electron?
- A.
Photoelectric
- B.
Bremsstrahlung
- C.
Characteristic
- D.
Compton
Correct Answer
C. CharacteristicExplanation
The interaction that involves an incident electron interacting with an inner shell electron is called a characteristic interaction. In this type of interaction, the incident electron collides with an electron in an inner shell of an atom, causing the inner shell electron to be ejected from the atom. This interaction is characteristic because it produces characteristic X-rays, which are unique to the atom and can be used to identify the element present.Rate this question:
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- 12.
In a characteristic interaction, which electron movement will be diagnostically relevant?
- A.
drop into K shell
- B.
Drop into L shell
- C.
Drop into M shell
- D.
All of the above
Correct Answer
A. drop into K shellExplanation
pg133Rate this question:
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Current Version
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Aug 24, 2023Quiz Edited by
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Sep 26, 2017Quiz Created by
Ryan Emerson
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