What is the anatomic position?
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The body is erect, feet slightly apart, the head is held high, and the palms
of the hands are facing forward.
polychromatic x-ray energy
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an x-ray beam that is composed of photons with varying energies
What are image artifacts?
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Objects seen on a CT image that are not present in the object scanned.
What are the main advantages of CT over conventional radiography?
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1. Elimination of superimposed structures
2. Ability to differentiate small differences in density of anatomic structures
and abnormalities
3. Superior quality of images
focal spot
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area on the anode that electrons hit during x-ray production
Matrix
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Grid formed by the rows and columns of pixels
Artifacts
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Objects seen on the image but not present in the object scanned.
raw data
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All measurements obtained from the detector array and sitting in the
computer waiting to be made into an image. Also called scan data
heat dissipation
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Ability of the tube to rid itself of heat.
Cupping artifacts
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Artifact that results from beam hardening. It appears on the image as a
vague area of increased density in a somewhat concentric shape around
the periphery of an image, similar to the shape of a cup.
Low contrast resolution
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The body is erect, feet slightly apart, the head is held high, and the palms
of the hands are facing forward.
polychromatic x-ray energy
Give this one a try later!
an x-ray beam that is composed of photons with varying energies
What are image artifacts?
,Give this one a try later!
Objects seen on a CT image that are not present in the object scanned.
What are the main advantages of CT over conventional radiography?
Give this one a try later!
1. Elimination of superimposed structures
2. Ability to differentiate small differences in density of anatomic structures
and abnormalities
3. Superior quality of images
focal spot
Give this one a try later!
area on the anode that electrons hit during x-ray production
Matrix
Give this one a try later!
Grid formed by the rows and columns of pixels
Artifacts
, Give this one a try later!
Objects seen on the image but not present in the object scanned.
raw data
Give this one a try later!
All measurements obtained from the detector array and sitting in the
computer waiting to be made into an image. Also called scan data
heat dissipation
Give this one a try later!
Ability of the tube to rid itself of heat.
Cupping artifacts
Give this one a try later!
Artifact that results from beam hardening. It appears on the image as a
vague area of increased density in a somewhat concentric shape around
the periphery of an image, similar to the shape of a cup.
Low contrast resolution
