Compton
what is compton scatter
Incident photon (Ei) interacts with outer shell, loosely bound electron and ejects it
Coherent Scatter results from the ionization of an atom?
False
What are the conditions for photoelectric absorption to occur?
Condition 1: Incident photon energy must be greater than or equal to binding energy of inner shell electron
Condition 2: Incident photon energy and inner shell electron binding energy are close to each other
Condition 3: PE absorption interaction more likely to occur in elements with higher Z#
what is Brem interaction?
Projectile electron interact with the target nucleus
The electron binding energy for the K shell of Tungsten is known as:
69.5 keV
Which type of interaction may expose flouroscopy personel to scattered radiation?
Compton Scatter
Another name for Coherent scatter?
Thompson scatter
which of the following anatomical structures will result in the least amount of photoelectric absorption?
Lung
A Brem photon can carry a higher energy level than an incident electron
False
when the K shell electron is ejected and the vacancy is left in the atom, what happens next?
The vacancy is filled when an electron from outter shell moves in and fills the space
What is difference between Compton Scatter and Photoelectric Absorption
In Compton Scatter, Incident photon interacts with outer shell, loosely bound electron and ejects. While in Photoelectric Absorption, Incident photon energy completely absorbed by inner shell electron
Coherent Scatter is most likely to occur when the incident xray photon has an energy level less than what?
10 keV
what is photoelectron?
it is electron that is ejected from the atom when it struck by the photon
in the characteristic xray production process, an incident electron from the filament interact with_____ of a target atom
an inner shell electron
The movement of an outer shell electron to fill a vacancy in an inner shell is known as
Cascade effect
How is the incident photon energy being distributed in Compton Scatter?
Incident photon energy is distributed between recoil electron and scattered photon
Within Coherent scatter the incident photon’s energy is____ to the scatter photon
Equal in energy
Photoelectric absorption will results in what?
increase patient dose and cause damage to tissues and cells
what happens when the incident electron interacts with a K shell electron during a characteristic xray production?
the K shell electron is ejected from the orbit
The two interactions needed to create xray photons:
Characteristic and Brem
A compton electron, the dislodged electron from the atom the phton interact with what?
A recoil electron
An increase in coherent scatter would have this effect on spatial resolution?
No effect on spatial resolution
During a PE interaction in the patient, when the xray photon interaction with an inner shell electron of an atom, what happens to that electron?
it is ejected from the atom
An xray exposure using 55kev will produce only these types of____ interactions?
Brem
Incident electrons traveling closer to the nucleus will produce_____photons
High energy