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17 flashcardsby elijah
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1
refers to the fidelity with which the anatomical structures that is being examined is rendered on the radiograph
radiographic image quality
2
radiographic quality rules in fast image
high noise, low spatial resolution, and low contrast resolution
3
radiographic quality rules in slow image
low noise, high spatial resolution, and high contrast resolution
4
faithfully produces structures and tissue
high quality radiograph
5
ability of the image to separate objects and visually distinguish one from the other
resolution
6
important characteristics of image quality
spatial resolution
contrast resolution
7
ability to image small objects that have high subject contrast such as bone-soft tissue interface
spatial resolution
8
spatial resolution improves if the _, _, and _ decreases
screen blur, motion blur, and geometric blur
9
ability to distinguish anatomical structures of similar subject contrast
contrast resolution
10
undesirable fluctuation in the optical density of the image
inherent in imaging system
radiographic noise
11
four components of radiographic noise
film graininess, structure mottle, quantum mottle, and scatter radiation
12
distribution of size and shape of silver halide crystal in film emulsion
inherent in image receptor
film graininess
13
refers to the size and shape of phosphor in intensifying screen
inherent in image receptor
structure mottle
14
refers on how x-rays interact with the image receptor
it is the primary form of noise
quantum mottle
15
what are you going to use to reduce quantum mottle?
high mAs and low kVp
16
they have high quantum mottle because they only need few xrays to produce image
very fast screens
17
produces fog and is detrimental to the image
roam around after interacting with a substance
scatter radiation
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