Smoothing
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-is often used to reduce noise within an image or to produce a less
pixelated image
-adjusts the brightness values of adjacent pixels since the pixels can be
brought closer together
Reformatted Images
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, -Advantages:
*enables visualization of specific structures in relation to surrounding
structures
*determines extent of lesions or fractures
*helps to localize lesions, bone fragments, or foreign bodies
-Disadvantages:
*loss of detail due to quality of original axial image and plane thickness
Edge Enhancement
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-increases brightness along the edges of structures on an image to
increase the visibility of the edges
Gray Scale Manipulation
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-changes the brightness of the image and results in the enhancement of
the display image
-results in a modification of the histogram of the pixel values
Contrast Resolution
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, -is the ability to distinguish 1 soft tissue from another
-the ability to differentiate small differences in density on the image (0.5%
CT vs. 10% general x-ray)
-contrast resolution is superior in CT because of x-ray beam collimation
which cleans up the scatter using pre-patient & pre-detector collimators
Volume Rendering (VR)
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-enables visualization of structures beneath the surface
-also appears life-like, 3D
-utilized in angiography studies
3D Shaded Surface Display (SSD)
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-reconstructs images of the surfaces of anatomical structures
-utilized for surgical planning and radiation therapy
Factors controlling image appearance:
Give this one a try later!
Give this one a try later!
-is often used to reduce noise within an image or to produce a less
pixelated image
-adjusts the brightness values of adjacent pixels since the pixels can be
brought closer together
Reformatted Images
Give this one a try later!
, -Advantages:
*enables visualization of specific structures in relation to surrounding
structures
*determines extent of lesions or fractures
*helps to localize lesions, bone fragments, or foreign bodies
-Disadvantages:
*loss of detail due to quality of original axial image and plane thickness
Edge Enhancement
Give this one a try later!
-increases brightness along the edges of structures on an image to
increase the visibility of the edges
Gray Scale Manipulation
Give this one a try later!
-changes the brightness of the image and results in the enhancement of
the display image
-results in a modification of the histogram of the pixel values
Contrast Resolution
Give this one a try later!
, -is the ability to distinguish 1 soft tissue from another
-the ability to differentiate small differences in density on the image (0.5%
CT vs. 10% general x-ray)
-contrast resolution is superior in CT because of x-ray beam collimation
which cleans up the scatter using pre-patient & pre-detector collimators
Volume Rendering (VR)
Give this one a try later!
-enables visualization of structures beneath the surface
-also appears life-like, 3D
-utilized in angiography studies
3D Shaded Surface Display (SSD)
Give this one a try later!
-reconstructs images of the surfaces of anatomical structures
-utilized for surgical planning and radiation therapy
Factors controlling image appearance:
Give this one a try later!
