Term
| I an x-ray beam passes through radiograph with little or no resistance and the image is darker what would that be? |
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Definition
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Term
| what are some more dense objects that appear radiopaque? |
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Definition
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Term
| the overall blackness of film |
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Definition
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Term
| increasing kvp=_______ scale contrast? and high or low contrast? |
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Definition
| increasing kvp=long scale, low contrast |
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Term
| decreasing kvp=what scale contrast and high or low? |
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Definition
| decreasing kvp=short scale contrast and high contrast. |
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Term
| the difference between degrees of blackness on a radiograph is? |
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Definition
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Term
| if a radiograph has very dark and very light areas what kind of contrast is that? |
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Definition
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Term
| if there are many shades of grey what contrast is that? |
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Definition
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Term
| air space has what shade? |
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Definition
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Term
| the one exposure factor that has a direct influence on the contrast of a radiograph is? |
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Definition
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Term
| what type of contrast is preferred in dental care? |
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Definition
| a compromise between short-scale and long scale |
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Term
| the range of useful densities seen on a dental radiograph is termed? |
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Definition
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Term
| what are the two types of scale of contrast |
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Definition
| long scale and short scale |
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Term
| if a radiograph shows only two densities of black and white it is what contrast scale? |
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Definition
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Term
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Definition
| many densities or shades of gray |
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Term
| what is determined by the thickness, density, composition (atomic #) |
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Definition
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Term
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Definition
| thickness of soft tissue or bone in a patient |
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Term
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Definition
-can demonstrate short and long scale contrast
-monitor quality control of film processing
-demonstrate densities
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Term
| the capability of the receptor to reporoduce distinct outlines of an object is termed? |
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Definition
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Term
| the unsharpness or blurred image is |
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Definition
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Term
| the geometric characteristic that refers to a radiographic image that appears larger than its actual size? |
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Definition
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Term
| the variation of true size and shape of an object being radiographed is? |
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Definition
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Term
| decreased focal spot = ______ sharpness? |
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Definition
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Term
| increased crystal size=_______ sharpness? |
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Definition
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Term
| decreased crystal size =______ sharpness? |
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Definition
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Term
| decreased in movement does what to sharpness? |
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Definition
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Term
increase in movement results in what sharpness?
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Definition
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Term
| if you increase target to receptor distance what happens to magnification? |
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Definition
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Term
| if you decrease target to receptor distance what happens to magnification? |
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Definition
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Term
| when object and receptor are parallel what happens to disortion? |
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Definition
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Term
| if the beam is perpendicular to object and receptor, what happens to distortion? |
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Definition
| decrease in distortion when beam is perpendicular |
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Term
| if the beam is not perpendicular to object and receptor what happens to distortion? |
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Definition
| distortion is increased when beam is not perpendicular |
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Term
| what are 3 factors that influence sharpness? |
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Definition
-movement
-film compostition
-focal spot size- |
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Term
| if a focal spot is more small, will the image be sharp or not? |
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Definition
| smaller the focal spot, the more sharp the image |
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