The x-ray photon produced during classical scattering has this much energy after being scattered
What is the same energy as the incident photon
100
An incident photon must have this for a PE interaction to occur
What is energy equal to or greater than the binding energy of an inner-shell electron
100
This rare scatter interaction only happens at high energy levels above 1.02 MeV
What is pair production
100
Differential absorption is primarily a result of which type of x-ray interaction with matter
What is photoelectric interactions
100
This is the random fluctuation in the optical or image density of an image
What is noise
200
This type of scatter production involves the x-ray photon removing a middle or outer shell electron
What is Compton scattering
200
During PE interactions incident photons lose how much of their energy?
What is they lose all of their energy and no longer exist
200
This interaction results in the ejection of a proton, neutron, or alpha particle from the nucleus of an atom.
What is Photodisintegration
200
X-ray beam attenuation is a result of scattering and this effect.
What is absorption
200
Doubling the mAs will have what effect on the density of an image?
What is, it will double the optical density
300
This type of scattering results in the incident photon losing up to one third of its original energy
What is Compton scattering
300
PE interactions contribute significant amounts of dose to whom?
Who is the patient
300
When a positron interacts with an electron this happens (two parts)
What are, an annihilation event occurs and two x-ray photons of 0.51MeV are created at 180 degrees from each other.
300
At higher kVp values within the diagnostic range the percentage of the beam that is made up of photoelectric interactions does this (up, down, the same, can't determine).
What is goes down
300
A radiograph of an chest showed a circular lesion on the lung, which measured a 5 cm diameter on the image. The radiograph was taken at 100cm and the lesion was known to be 15 cm from the image receptor. What is the actual size of the lesion?
What is 4.25 cm in diameter
400
Secondary photons created from a characteristic cascade during Compton scatter contribute dose primarily to this person
What is the patient
400
There are at least three end products of a photo electric interaction. Name one of them.
What is an ionized atom, or a photo electron, or characteristic photons
400
Photodisintegration will occasionally occur when photons above 10MeV interact with this part of an atom.
What is the nucleus
400
This is the name given to the beam as it exits the patient.
What is the remnant beam
400
There are several effects that come from increasing OID name two of them
What are: Increased magnification, Increased focal spot blur, Increased appearance of motion blurring, slightly increased image contrast, etc.
500
This is the reason that Compton scatter photons which strike the image receptor do not contribute useful information to the image.
What is the photons have changed direction
500
During PE interactions photons interact and eject this part of an atom.
What is an inner shell electron
500
Pair production occurs when an incident photon interacts with this.
What is the nucleus of an atom
500
Scatter radiation that strikes the image receptor has this effect on image density
What is it increases image density (although, it's not useful information)
500
Increasing field size has this effect on image contrast
What is, it significantly decreases image contrast