Ch. 30
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| ______ is the degree of geometric sharpness or accuracy of the structural lines actually recorded in the image. | show 🗑
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| Recorded detail is also referred to as: | show 🗑
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| The primary film/screen unit of resolution is ______. | show 🗑
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| Most human visual acuity is limited to the range of ____ lp/mm. | show 🗑
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| show | matrix size, pixel size and gray scale bit depth.
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| Digital imaging recorded detail is most commonly described in terms of _________. | show 🗑
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| A shorter wavelength signal (with higher frequency) represents pairs of lines that can be visualized ________. | show 🗑
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| Low frequency spatial resolution has a longer wavelength (and lower frequency) representing pairs of lines that are _______. | show 🗑
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| The art of radiography involves controlling the degree of _______ so that it does not interfere with image diagnosis. | show 🗑
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| _______ for digital images can be expressed in terms of three dimensions of the image. | show 🗑
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| Spatial resolution describes the ability of an imaging system to accurately display objects in _____. | show 🗑
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| ____________ measure the boundaries of a single image. | show 🗑
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| show | penumbra or blur
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| The higher the _________, the closer together the sine waves and the closer together the line pairs. | show 🗑
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| show | Modulation transfer function,
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| _______ is background information that the IR receives. | show 🗑
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| ______ refers to a lack of sufficient incoming data (photons) for processing. | show 🗑
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| Another name for quantum noise is ________. | show 🗑
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| show | Nyquist criterion
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| show | aliasing
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| Resolution affects the image appearance by demonstrating _______ structures. | show 🗑
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| show | motion
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| show | 1. eliminate motion 2. reduce OID 3. reduce focal spot size 4. reduce intensifying screen phosphor size and concentration and 5. increase SID
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| Resolution is improved when OID ______ and degrades whenever it ______. | show 🗑
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| Resolution is improved when SID ______ and degraded when it ______ | show 🗑
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| show | detail
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| show | umbra
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| The _____ is the imperfect, unsharp shadow surrounding the umbra. | show 🗑
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| show | penumbra; increasing
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| show | attenuation
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| show | resolution
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| show | phosphor size, phosphor layer thickness and phosphor concentration
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| Quantum mottle is corrected only by increasing ______. | show 🗑
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| The major factors that limit photostimulable phosphor systems are the _____ and _____. | show 🗑
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| The major factor that limits INDIRECT digital systems is the ______ | show 🗑
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| show | size of the detector element
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| show | voluntary motion
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| show | communication with the patient
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| show | involuntary motion
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| Involuntary motion can best reduced by decreasing ________. | show 🗑
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| What are methods which can be used to reduce the possibility of motion? | show 🗑
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| Digital imaging systems are dependent on: | show 🗑
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| Visualization of _________ is in indication of acceptable resolution | show 🗑
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| show | depth (depth of information)
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| High spatial resolution represents a high frequency signal that is capable of imaging | show 🗑
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| show | larger objects
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| The focal spot size is a major controller of image resolution because it controls | show 🗑
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| show | high resolution
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