Quiz
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| Multiple numeric values divided into an array of small elements capable of being processed is the definition of _____ images. | Digital
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| The continuous and varying levels of brightness and colors describe _____ images. | Analog
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| Critical characteristics of a digital image include all of the following except a. dose efficiency of the receptor. c. noise efficiency. b. contrast resolution. d. sample resolution. | sample resolution.
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| Changing the matrix and the FOV will not change the size of the pixel. T or F | False
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| Each square in a matrix is called a | picture element
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| The number of bits per pixel is known as bit | Depth
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| If a pixel has a bit depth of 2 to the 9th, the number of gray tones that pixel can produce is | 512
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| The size of the pixel is determined by the | matrix
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| Exposure index refers to the amount of exposure to the patient. T or F | False
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| The measurement for radiation that was incident on the image receptor for a particular exposure is known as | Kind
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| Deviation index is the difference between _____ and _____ expressed in logarithmic fashion. | actual exposure (KIND); target exposure (KTGT)
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| Factors that can adversely affect the pixel values expressed in the deviation index include all of the following except | failure of the system to recognize the exposure indicator.
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| How dark or light a digital image appears on a display monitor is known as | brightness
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| The ability of a digital system to display subtle changes in shades of gray is called | contrast resolution.
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| The ability of an imaging system to demonstrate small details of an object is known as | spatial resolution
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| "The sum of the components in a recording system cannot be greater than the system as a whole" is a definition of | modulation transfer function (MTF).
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| A perfect image processing system would have an MTF of | 100%
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| The more light spread, the ______ the MTF. | Lower
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| The range of exposure values the image detector is able to produce is known as | latitude
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| The efficiency of a system to convert x-ray input signal into a useful output image is known as | detective quantum efficiency.
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| Air kerma is the measurement of radiation energy absorbed in a unit of air. T or F | True
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| The reflection of ambient light can be problematic with monochromatic monitors. T or F | True
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| MTF is a way to quantify the contribution of each system component and the component's overall efficiency. T or F | False
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| It is possible to achieve an MTF of 100%. T or F | False
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| A system's ability to respond to varying levels of exposure, resulting in more detail, is referred to as | Dynamic range
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