Kisner Imaging Chap3
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28 Terms
SID
source to image distance
SOD
source to object distance
OID
object to image distance
SOD + OID=
SID
In order to produce an image, what must happen?
x-ray photons must leave the tube and pass through the tube
Less than ___ of the primary beam reaches IR.
5%
What is a latent image?
The image before processing
What is a manifest image?
The image that is seen after processing
The process where some of the beam is absorbed and some is transmitted through the anatomic part is termed:
Differential absorption
Radiolucent
Tissues that allow x-rays to pass through, appearing black or pale grey (eg. air and fat)
Radiopaque
Tissues that absorb x-rays, appearing white or clear(ex. Bone)
The lost of energy (intensity) of the primary x-ray beam as it passes through tissue
Beam attenuation
Complete absorption of the incoming photon.
Photoelectric effect
Interaction where an incoming photon loses some energy and changes direction after interacting with an outer orbital electron
Compton Effect
Transmitted and scattered radiation that creates an image representing the atomic area of interest.
Exit radiation
An increase in photon energy, _____ the probability of a photoelectric effect occurring.
Decreases
The greater the atomic number, the _______ the chance of a photoelectric event.
Greater
What is spatial resolution?
The accuracy of the atomic structural lines recorded in an image
What is the atomic number of bone?
13.8
What is another name for “compton effect”?
Scattering
When an incoming photon loses some but not all of its energy, and then changes direction.
Scattering or Compton Effect
Scattering is dependent only on the ______ of the incoming photon.
Energy
The more kVp, the _____ the chance of scatter.
Higher
Up to 50 kVp will result in what type of interaction?
Photoelectric
More than 200 kVp results in what type of interaction?
Compton
60-90 kVp will result in what type of interaction?
Both photoelectric and compton
The type of interaction that occurs below the diagnostic range:
Coherent (Classical scattering)
The type of interaction where the x-ray photon does not lose energy, but it changes direction.
Coherent