Term
| DR systems have an extremely ___ tolerance for patient over exposure |
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Definition
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Term
| screen film image can display only approximately ___ shades of gray |
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Definition
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Term
| in digital imaging, image contrast ___ change with dose |
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Definition
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Term
| ___ no longer controls contrast in digital imaging |
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Definition
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Term
| ___ no longer controls optical density |
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Definition
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Term
| practitioners have the opportunity to reduce patient dose by __-__% depending on exam |
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Definition
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Term
| kVp values range from __ to __ for CR |
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Definition
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Term
| optimum kVp ranges for CR are from __ to __ |
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Definition
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Term
| image density/brightness on the display monitor is controlled by ___ |
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Definition
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Term
| occurs when an insufficient amount of light is produced and image is grainy |
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Definition
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Term
| the two important factors that should be considered when selecting CR imaging cassette |
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Definition
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Term
| the two types of imaging plates |
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Definition
| standard and high resolution |
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Term
| these imaging plates are used for extremities, mammography, and other exams requiring increased detail |
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Definition
| high resolution imaging plates |
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Term
| cassette selection for CR images is ___ critical than screen film images |
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Definition
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Term
| using the ___ imaging plate possible for each examination results in the ___ sampling rate |
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Definition
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Term
| grid use in CR occurs ___ often due to sensitivity of IP to scatter |
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Definition
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Term
| grid selection will depend on |
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Definition
part size
kVp
scatter clean up desired
grid frequency |
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Term
| a wavy artifact that occurs if scan laser and grid lines are parallel |
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Definition
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Term
| number of grid lines per centimeter/inch |
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Definition
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Term
| the __ the frequency, the ___ the grid lines and the ___ they interfere with the image |
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Definition
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Term
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Definition
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Term
| the relationship between the height of the lead strips and the space between the lead strips |
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Definition
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Term
| the ___ the grid ratio, the ___ scatter radiation absorbed and the more ___ the positioning |
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Definition
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Term
| most grids chosen by departments are ___ and ___ |
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Definition
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Term
| parallel grids are __ critical in beam centering, but should not be used at distances less than ___in |
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Definition
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Term
| on cassettes ____ or smaller it is important to select a high frequency grid to eliminate scatter |
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Definition
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Term
| ___ results in an increased contrast and reduces amout of grid cleanup necessary |
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Definition
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Term
| a postprocessing feature that allows black background to be added around the original collimation edges, eliminating white or clear distracting areas |
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Definition
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