FREE AND STUDY GAMES ABOUT X-RAY EMISSION EXAM

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FREE AND STUDY GAMES ABOUT X-RAY EMISSION EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -22 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Total filtration is the combination of Inherent and Added filtering

Answer:

X-ray beam filters

Question 2: Coherent Scattering(aka classical, unmodified)

Answer:

low energy x-ray(~10 to 20 keV) interacts with atom. causes EXCITATION(vibration) of atom at SAME FREQUENCY as x-ray. when vibration stops, a scattered x-ray given off at SAME ENERGY only CHANGED in DIRECTION. accounts for<5% of scatter in diagnostic xray

Question 3: Discuss the role of coherent scattering in diagnostic imaging?

Answer:

Coherent scatter accounts for less than 5% of the scatter radiation produced.Question 4: Speacial type of filter used when the body part being examined changes in thickness or density from one are to another

Answer:

Compensating Filters

Question 5: Attenuation

Answer:

The reduction in the number of x-ray photons in the beam as it passes through matter Question 6: The process of eliminating undesirable low-energy x-ray photons by the insertion of absorbing materials into the primary beam

Answer:

X-ray Beam Filtration

Question 7: List 5 interactions that can occur when x-ray interacts with matter

Answer:

Coherent Scattering, Compton Scattering, Photoelectric Effect, Pair production, and photodisintegration

Question 8: X-rays that are absorbed and/ or scattered are said to have been?

Answer:

Attenuated

Question 9: As x-rays intersct with matter, they will either?

Answer:

Pass through unaltered(gray on IR), Be totally absorbed(white on IR),Be partially absorbed,lose energy and change direction(scattered)(this will degrade image)

Question 10: What is the relationship of kVp to incidence of x-ray interaction?

Answer:

The type of interaction between x-ray and matter is determined by the energy of the incident x-ray.Since kVp controls the average energy of the x-ray beam, it will also determine the incidence of a particular interaction.Question 11: thickness of absorbing material necessary to reduce the x-ray intensity to half of its orignal value

Answer:

Half-value layer

Question 12: What is the predominant interaction in the diagnostic x-ray range?

Answer:

The photoelectric effect (PE) is the primary interaction due to its effect on the imaging process and patient dose considerations

Question 13: How does scatter radiation affect image contrast?

Answer:

Scatter radiation adversely decreases image contrast by adding fog or grayness to the image.

Question 14: Explain the process of coherent scattering?

Answer:

Coherent scatter results when very low energy x-ray produces a vibration in the atom with which it interacts. When the vibration stops, a new x-ray photon emerges with the same energy as the incident x-ray, but diverted in a different direction.

Question 15: X-ray tube port and dielectric oil.

0.5mm Al equiv.

Answer:

Inherent filtration

Question 16: increase beam quality by removing low energy x-rays from the beam

Answer:

Filtration

Question 17: The Purpose of X-ray Beam Filtration

Answer:

To absorb the long wavelength (low Energy) photons as they leave the x-ray tube and before theycan reach the patient Question 18: How does kVp affect the number of photoelectric versus Compton interaction?

Answer:

At low kVp, there are more incidents of photoelectric interactions (since these are more predominant at lower energies). At higher kVp's, PE interactions are reduced and there is a higher incidence of Compton interactions.

Question 19: sheet of aluminum and collimator mirror

Answer:

Added filtration

Question 20: What causes the reduction in the number of x-rays?

Answer:

the 5 interaction proceses.(they result in ABSORPTION or SCATTERING of the x-ray photons) (specific interaction dependent on ENERGY OF THE X-RAY)Kiloelectron volt=keV

Question 21: how is scatter radiation produced?

Answer:

Scatter radiation is primarily produced when x-ray interacts with an outer shell electron, loses energy, and is diverted in a different direction during a Compton Interaction.

Question 22: 2 factors that contribute to x-ray beam quality

Answer:

kVp and Filtration