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