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Questions and Answers
Why is the x-ray tube evacuated?
Why is the x-ray tube evacuated?
What is one consequence of not evacuating the x-ray tube?
What is one consequence of not evacuating the x-ray tube?
What protects the electrons in the x-ray tube from reducing their speed?
What protects the electrons in the x-ray tube from reducing their speed?
What is NOT a function of the vacuum in the x-ray tube?
What is NOT a function of the vacuum in the x-ray tube?
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What happens to the electrons in the x-ray tube without a vacuum?
What happens to the electrons in the x-ray tube without a vacuum?
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What is one of the primary effects that results from the interaction of x-rays with atoms?
What is one of the primary effects that results from the interaction of x-rays with atoms?
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What happens to the energy of a photon when it interacts with a tissue atom?
What happens to the energy of a photon when it interacts with a tissue atom?
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What is a consequence of the scattering of x-rays during an interaction?
What is a consequence of the scattering of x-rays during an interaction?
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Which particle is ejected during the ionization process initiated by x-ray interaction?
Which particle is ejected during the ionization process initiated by x-ray interaction?
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What further interaction does the ejected electron undergo after being released from the atom?
What further interaction does the ejected electron undergo after being released from the atom?
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What initiates the photoelectric effect?
What initiates the photoelectric effect?
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What happens to the energy of the X-ray photon during the photoelectric effect?
What happens to the energy of the X-ray photon during the photoelectric effect?
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Which shell electron is typically involved in the photoelectric effect when X-ray photons interact with tissue atoms?
Which shell electron is typically involved in the photoelectric effect when X-ray photons interact with tissue atoms?
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Which statement best describes the process of the photoelectric effect?
Which statement best describes the process of the photoelectric effect?
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What type of photon predominantly contributes to the photoelectric effect in tissue?
What type of photon predominantly contributes to the photoelectric effect in tissue?
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Which type of collimator consists of a metal plate or disk with a hole that allows the beam to pass through?
Which type of collimator consists of a metal plate or disk with a hole that allows the beam to pass through?
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What shapes can diaphragms have?
What shapes can diaphragms have?
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Which of the following is NOT a type of collimator mentioned?
Which of the following is NOT a type of collimator mentioned?
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Which of these collimator types allows a beam to pass through in a controlled manner?
Which of these collimator types allows a beam to pass through in a controlled manner?
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Which type of collimator would you use to create a diverging beam?
Which type of collimator would you use to create a diverging beam?
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What determines the shape of the X-ray beam?
What determines the shape of the X-ray beam?
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Where is the diaphragm placed in X-ray equipment?
Where is the diaphragm placed in X-ray equipment?
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Which statement is TRUE regarding the function of the diaphragm in an X-ray machine?
Which statement is TRUE regarding the function of the diaphragm in an X-ray machine?
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What is the relationship between the diaphragm and the X-ray beam?
What is the relationship between the diaphragm and the X-ray beam?
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What is the primary design consideration for the diaphragm in an X-ray machine?
What is the primary design consideration for the diaphragm in an X-ray machine?
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Study Notes
X-ray Tube Vacuum
- Evacuating the x-ray tube prevents collisions between fast-moving electrons and gas molecules.
- These collisions would significantly slow down the electrons.
- The vacuum also prevents oxidation and “burnout” of the filament.
X-ray Photon Interactions with Matter
- X-ray photons can interact with tissue atoms in various ways.
- Compton scattering: X-ray photon ejects a Compton recoil electron.
- Photon energy decreases due to energy transferred to the electron.
- X-ray direction changes, resulting in scattered radiation.
- Photoelectric effect: X-ray photon interacts with an inner-shell electron of the tissue atom.
- Photon is absorbed completely by the electron, resulting in pure absorption.
X-ray Beam Collimation
- Collimation shapes and restricts the x-ray beam.
- Diaphragms are common collimators, consisting of a lead plate with a hole in the center.
- The shape of the diaphragm hole determines the shape of the x-ray beam.
- Diaphragms are placed over the opening of the x-ray machine head.
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Description
Explore the essential principles of X-ray technology, including the importance of vacuum in X-ray tubes, interactions of X-ray photons with matter, and the significance of beam collimation. This quiz will test your understanding of how these factors influence X-ray imaging and safety.
