LRA 211 CHAPTERS 8&9 QUESTIONS
AND AMNSWER SWITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
1. Which of the following describes the process of radiographic image
formation?
Answer: ✔✔ Differential absorption
Explanation:
Differential absorption refers to the varying degrees of absorption and
transmission of x-ray photons as they pass through different tissues in the
body. This process is responsible for the formation of a radiographic image,
as different tissues (like bone, muscle, and fat) absorb x-rays to varying
extents. The attenuated (absorbed and scattered) photons form the image
on the receptor.
2. X-rays can eject electrons from atoms. This is known as:
Answer: ✔✔ Ionization
Explanation:
Ionization occurs when an x-ray photon has enough energy to eject an
electron from an atom, resulting in the atom becoming an ion (positively
charged ion and a free electron). This process is a key mechanism in
radiation interactions with matter and is one of the primary ways that x-rays
affect biological tissue.
3. The X-ray interaction with anatomic tissue that is responsible for scattering
is:
Answer: ✔✔ Compton
Explanation:
Compton scattering occurs when an incoming x-ray photon collides with
an outer-shell electron in an atom, ejecting the electron and causing the
photon to lose energy and change direction. This scattered photon can
, contribute to image noise and radiation exposure to surrounding tissue.
Compton scattering is one of the main interactions between x-rays and tissue
in the diagnostic range.
4. Which of the following will increase beam attenuation?
Answer: ✔✔ Thicker anatomic part
Explanation:
Beam attenuation refers to the reduction in the intensity of the x-ray beam
as it passes through an object. A thicker anatomic part (like a larger body
area or dense tissue) will absorb more x-rays, leading to greater attenuation
of the beam. The thicker or denser the tissue, the more x-rays will be
absorbed or scattered, decreasing the amount of radiation reaching the image
receptor.
5. Factors that decrease X-ray absorption include:
Answer: ✔✔ Increased x-ray beam quality
Explanation:
Increased x-ray beam quality, typically achieved by increasing the
kilovolt peak (kVp), results in higher energy (penetrating) x-rays. Higher
energy photons are less likely to be absorbed by tissue and are more likely
to pass through, thus decreasing absorption. This leads to less attenuation
and more transmission of x-rays through the body.
6. The range of exposure intensities an image receptor can accurately detect
defines:
Answer: ✔✔ Dynamic range
Explanation:
Dynamic range refers to the range of exposure intensities (or the range of
light/darkness) that an image receptor (such as a digital detector) can
accurately capture. A wide dynamic range allows the image receptor to
AND AMNSWER SWITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
1. Which of the following describes the process of radiographic image
formation?
Answer: ✔✔ Differential absorption
Explanation:
Differential absorption refers to the varying degrees of absorption and
transmission of x-ray photons as they pass through different tissues in the
body. This process is responsible for the formation of a radiographic image,
as different tissues (like bone, muscle, and fat) absorb x-rays to varying
extents. The attenuated (absorbed and scattered) photons form the image
on the receptor.
2. X-rays can eject electrons from atoms. This is known as:
Answer: ✔✔ Ionization
Explanation:
Ionization occurs when an x-ray photon has enough energy to eject an
electron from an atom, resulting in the atom becoming an ion (positively
charged ion and a free electron). This process is a key mechanism in
radiation interactions with matter and is one of the primary ways that x-rays
affect biological tissue.
3. The X-ray interaction with anatomic tissue that is responsible for scattering
is:
Answer: ✔✔ Compton
Explanation:
Compton scattering occurs when an incoming x-ray photon collides with
an outer-shell electron in an atom, ejecting the electron and causing the
photon to lose energy and change direction. This scattered photon can
, contribute to image noise and radiation exposure to surrounding tissue.
Compton scattering is one of the main interactions between x-rays and tissue
in the diagnostic range.
4. Which of the following will increase beam attenuation?
Answer: ✔✔ Thicker anatomic part
Explanation:
Beam attenuation refers to the reduction in the intensity of the x-ray beam
as it passes through an object. A thicker anatomic part (like a larger body
area or dense tissue) will absorb more x-rays, leading to greater attenuation
of the beam. The thicker or denser the tissue, the more x-rays will be
absorbed or scattered, decreasing the amount of radiation reaching the image
receptor.
5. Factors that decrease X-ray absorption include:
Answer: ✔✔ Increased x-ray beam quality
Explanation:
Increased x-ray beam quality, typically achieved by increasing the
kilovolt peak (kVp), results in higher energy (penetrating) x-rays. Higher
energy photons are less likely to be absorbed by tissue and are more likely
to pass through, thus decreasing absorption. This leads to less attenuation
and more transmission of x-rays through the body.
6. The range of exposure intensities an image receptor can accurately detect
defines:
Answer: ✔✔ Dynamic range
Explanation:
Dynamic range refers to the range of exposure intensities (or the range of
light/darkness) that an image receptor (such as a digital detector) can
accurately capture. A wide dynamic range allows the image receptor to
