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13 Cards in this Set

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  • Back
Attenuation
The reduction in the total number of x-ray photons remaining in the beam after passing through material.
Materials with higher atomic numbers will have what affect on the beam?
Attenuate a greater percentage of the beam thn low atomic number materials.
How tightly the atoms of a given substance are packed together is called?
Density (kg/m^3)
What are the 5 basic substances that compise the human body?
Air, Fat, Water, Muscle, Bone.
What is the greatest variable during a radiographic procedure?
The patient
What does the body consist of at the atomic level?
Hydrogen (1), Carbon(6), Nitrogen (7), and Oxygen (8)
What is found in concentrated amounts in bones and teeth?
Calcium (20)
The amount or type of tissue being examined will alter the image receptor exposure.
Subject Density
Degree of differential absorption resulting from differing characteristics of tissues in the body.
Subject Contrast
Recorded detail of structures is dependent on their position w/in the body and also the body's placement to the receptor.
Subject Detail
Missrepresentation of a certain structure due to patient position.
Subject Distortion
How does the atomic number affect attenuation?
The higher the atomic number the more attenuation; the lower the atomic number the less attenuation.
How does tissue density affect attenuation?
When the tissue is dense the beam will be attenuated to a greater degree; when the tissue has less density the more beam will pass through un-attenuated.