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18 Cards in this Set
- Front
- Back
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whats the term for discrete units of information that together constitutes an image |
Pixel |
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The discernable separation of closely adjacent image details what is this term? |
Spatial resolution |
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Refers to the number of paired lines visible in 1 mm of an image? |
Line pair |
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Relating to a mechanism in which data is represented by continuously variable physical quantities? |
Analog |
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Refers to the total number of shades of grey visible in an image? |
Gray Scale |
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A digital radiographic image exists as bits of information in a computer file
The computer converts this information into an image that appears on the computer monitor
which statements are true? |
Both Statements are true |
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Digital radiography can be used for which of the following?
a. to detect caries b. to monitor an endodontic procedure c. to detect dental disease d. all of the above |
D. All of the above |
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Digital radiography systems can be used for which of the following?
a. bitewings images b. periapical images c. panoramic images d. All of the above |
D. All of the above |
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When a transparency scanner or digital camera is used to convert an existing film-based radiograph to a digital file, the process is called what? |
D. Digitization |
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Each of the following is a digital image receptor except one. which one is the exception?
a. CCD c. XCP d. PSP |
C. XCP |
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Which of the following stores the x-ray energy until later stimulation by a laser beam reads the electric signal and converts it into a digital image |
D. XCP |
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Each of the following is necessary for digital radiography except one. Which one is the exception?
a. X-ray machine b. Solid state sensor or phosphor coated plate c. Computer and monitor d. special software e. darkroom |
Darkroom |
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To maintain infection control, most manufacturer recommend that the sensor used in digital radiography be what? |
D. Wipe down with an intermediate level disinfectant and covered with a plastic barrier |
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The smaller the number of pixels in the image the sharper the spatial resolution
Each pixel stores a number representing a different shade of gray
Which Statement are true
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C. Both Statement are true |
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Digital radiography requires less radiation exposure to produce an image than film-based radiography because the |
Image receptor CCD or CMOS is more sensitive to x-rays than film |
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Each of the following is true regarding digital radiography in comparison to film-based radiography except one. which one is the exception ?
a. Provides a more legal document b. less time is required to obtain a diagnosis c. Eliminate film and chemical wastes d. patient radiation is reduced 0 to 50 percent e. Software features enhance interpretation |
A. Provides a more legal document |
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Each of the following is a disadvantage of digital radiography when compared to film-based radiography except one. Which one is the exception? a. initial cost of setting up system b. being able to magnify the image for diagnosis c. risk of computer crashes and lost files d. learning curve required to transfer interpretation skills e. Management infection control |
B. Being able to magnify the image for diagnosis |
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Name 5 features offered by digital software that can be used to enhance the radiographic image |
Side by side displays of images Magnification Density and Contrast Measurement tools Digital subtraction |
