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26 Cards in this Set
- Front
- Back
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The sharpness and sbruptness of structural detail borders
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Recorded Detail
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The sharpness and abruptness of structural detail borders; in electronic/digital imaging, term used to describe this quality is.....
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Spatial Resolution
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What are some other terms that refer to recorded detail?
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Resoultion, clarity, defintion, and sharpness
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Recorded detail is measured with what?
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A resolution test pattern
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How is a resoultion test pattern expressed?
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It is expressed in lpmm
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Anything that affects density or contrast will or will not affect visibility of detail?
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Anything that affects density or contrast does affect visibility of detail
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_______ relats to the size and shape of the image compared to the acutal size and shape of the object.
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Distortion
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Magnification, elongation, and foreshortening are used when describing ________
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Magnification, elongation, and foreshortening are used when describing DISTORTION
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Recorded detail and magnification are (inversely, directly) related
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Recorded detail and magnification are inversely related
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As recorded detail increases, magnification (increases, decreases)
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As recorded detail increases, magnification decreases
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SID & OID regulte _________
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Magnification
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SID is (inversley, directly) related to magnification
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SID is inversely related to magnification ( increase SID = decrease magnification)
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SID is (inversely, directly) related to recorded detail
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SID is directly related to recorded detail (increase SID = increased recorded detail)
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OID is (inversely, directly) related to magnifiction
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OID is directly related to magnification (increase OID = increase magnification)
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OID is (inversely, directly) related to detail
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OID is inversely related to recorded detaail (increased OID = decreased recorded detail
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True or False:
Some geometric unsharpness is intrinsic bc of the shape & position of the structure of intrest within the body |
True
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True or False?
Structures that do not parllel the x-ray tube and IR and/or that lie outside the central axis of the x-ray beam will be foreshortened or elongated |
True
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Structures within the bosy lie at varying distances from the x-ray IR, producing varying degrees of ___________
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Magnification
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The extent or size of the unsharp area is (inversely, directly) related to the focal spot size and OID
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Directly
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Unsharpness (increases, decreases) as focal spot size and OID increases and as the SID decreases
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Increases
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Borders of unsharpness around image details is often referred to as....
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Focal spot blur, geometric unsharpness, or edge gradient
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The (smaller, larger) the focal spot size, the better the geometrically recorded detail
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Smller
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The (actual, effective) focal spot is the finite area on the tungsten target tht is acutally bombarded by electrons from the filament
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The actual focal spot
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The (actual, effective) focal spot is the foreshortened size of the focus as it is projected down towards the IR
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The effective focal spot
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How the apparent focal spot will differ from the acutal focal spot as a result of the _______ _______ principle
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Line focusing principle
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True or false:
The angle of the anode does not has any effect on recorded detail |
False,
The angle of the anode cn have a significant effect on recorded detail |
