Term
| CR imaging plates are more sensitive to scatter than radiographic film. |
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Definition
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Term
| Digital radiography systems can compensate for gross underexposure. |
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Definition
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Term
| Digital radiography images that are underexposes will show quantum mottle. |
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Definition
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| Digital radiography images that are overexposed tend to suffer from low contrast. |
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Definition
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Term
| The CR imaging plate is only sensitive to scatter before it is sensitized through exposure to the x-ray beam. |
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Definition
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Term
| The CR imaging plate is only sensitive to scatter after it is sensitized through the exposure to the x-ray beam. |
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Definition
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Term
| When fluorohalides luminesce, they release all their energy as light. |
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Definition
| False, they do not release all of their energy. |
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Term
| The latent image stored on the CR imaging plate has wider latitude than radiographic film: |
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Definition
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Term
| The finely focused laser beam that scans each line of the imaging plate correlates to one pixel dimension. |
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Definition
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Term
| The smaller the pixels, the lower the spatial resolution. |
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Definition
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Term
| Kilovoltage for digital radiography controls contrast similar to film radiography. |
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Definition
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Term
| A big advantage of digital radiography is the reduction of repeat exposures resulting from incorrect technique. |
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Definition
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Term
| Grid use in digital radiography is required because of the sensitivity of the imaging plate to scatter. |
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Definition
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Term
| A cassette-based digital radiography system is called direct digital radiography. |
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Definition
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Term
| Cassette-less systems are considered direct radiography systems because the detector and reader are a permanant part of the table or wall unit. |
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Definition
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Term
| Digital radiography replaces: |
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Definition
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Term
| Detectors currently used in computed radiography include all of the following except: |
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Definition
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Term
| Silicon and selenium receptors are also known as: |
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Definition
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Term
| During CR imaging plate processing, when the laser frees trapped electrons, allowing them to return to a lower energy state, which type of light photon is released? |
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Definition
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Term
The histogram generated from the image data allows the digital system to find the:
a. minimum signal within the anatomical area of interest
b. maximum signal within the anatomical area of interest
c. shades of gray
d. all of the above |
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Definition
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Term
| Some digital radiography manufacturers recommend avoiding the use of more than ____kVp because higher kVp levels produce_____. |
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Definition
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Term
| The response of the imaging plate to ionizing radiation is: |
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Definition
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Term
| A CR artifact caused by insufficient mAs is: |
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Definition
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Term
| A CR artifact caused by the imaging plate being exposed to intense heat is: |
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Definition
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Term
| A CR artifact caused by incorrect preprocessing histogram selection is: |
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Definition
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Term
| Production of a grainy, reticulated image that cannot be corrected in digital post-processing is the result of |
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Definition
| failure to use a high enough mAs setting. |
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Term
| The ability of an algorithm to eliminate data that is clinically irrelevant to a particular examination is called: |
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Definition
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Term
| What feature of digital algorithms is most useful for high-noise images to make sharp edges blur into the background? |
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Definition
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Term
| An artifact that occurs during the image acquisition phase due to incomplete image plate erasure is called: |
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Definition
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