Ch.28 and 29
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| show | Geometric properties.
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| Some information is always lost during the process of? | show 🗑
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| show | Optimal geometric quality.
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| __________ refers to the distinctness or sharpness of the structural lines that make up the recorded image. | show 🗑
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| show | Geometric unsharpness.
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| show | Radiographic image
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| Manipulating each variable __________________ alters the amount of unsharpness recorded in the image. | show 🗑
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| Focal spot size is determined by? | show 🗑
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| When you select a focal spot size, you're actually selecting a ___________ that will be energized during x-ray production. | show 🗑
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| show | 0.5 to 0.6 mm
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| show | 1.0 to 1.2 mm
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| Focal spot size only affects recorded _______ | show 🗑
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| show | Unsharpness increases and recorded detail decreases
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| As focal spot size decreases, unsharpness ________ and recorded detail ________ | show 🗑
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| show | Exposure.
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| show | Small focal size.
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| show | Heat
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| show | Radiation exposure.
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| show | Modern generators.
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| show | Repeated exposures
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| Intensity of the x-ray beam is altered when changing the __________ between the source and object or object and receptor, some is the amount of unsharpness recorded on the image. | show 🗑
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| show | Diverging beam.
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| show | Decreases unsharpness, increases detail.
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| show | Increases unsharpness, decreases detail.
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| Increasing that OID, ________ The amount of unsharpness and ________ The recorded detail. | show 🗑
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| Decreasing the amount of OID, ______ The amount of unsharpness and _______ the detail. | show 🗑
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| _____________ distances for SID are used in x-ray to accommodate equipment limitations. | show 🗑
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| show | Standard
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| show | Unsharpness
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| Optimal detail is achieved when the OID is _____ | show 🗑
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| show | Distance
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| As the exit beam leaves the patient, it continues to ______ | show 🗑
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| When _______ is created between the area of interest and the image receptor, they diverging beam records ________ unsharpness within the image | show 🗑
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| The distance between the area of interest and the image receptor has a greatest effect on the amount of ________ | show 🗑
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| show | Minimum
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| The distance between the area of interest in the image receptor has a greatest effect on the amount of geometric unsharpness recorded than does | show 🗑
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| show | Formula
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| Focal spot size X OID / SOD = | show 🗑
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| show | Focal spot size
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| show | OID
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| The distance between the focal spot (source) and the object (area of interest). | show 🗑
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| show | SOD
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| When calculating the amount of unsharpness, keep the distance in the same units (I.e., inches or centimeters) this will cancel the units and result in | show 🗑
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| Motion unsharpness has the most detrimental effect on the ___________ of the radiographic image | show 🗑
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| show | Detail
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| Motion needs to be ________ | show 🗑
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| show | Blur
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| Blur is the most detrimental Factor to maximizing ______ | show 🗑
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| Unsharpness due to motion is classified as | show 🗑
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| show | Moving during an exposure
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| show | Shorter exposure time, higher mA. Provide clear instructions for the patients. Using physical Immobilization ex. Sandbags, tape.
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| Size distortion/magnification refers to an _____________________ compared to its true or actual size. | show 🗑
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| Radiographic images of objects are always ______ in terms of the true object size. | show 🗑
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| The _______ used (______ and _______) Play an important part in minimizing the amount of size distortion. | show 🗑
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| Magnification of the true object will occur because there is always some ______ | show 🗑
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| ______ Is directly related to magnification | show 🗑
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| As OID increases, size distortion ( magnification) _________ | show 🗑
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| show | Decreases
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| _______. Also influences the total amount of size distortion represented on an image | show 🗑
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| show | OID; SID
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| ________ is inversely related to magnification. | show 🗑
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| show | Decreases
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| show | Misrepresentation
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| show | Reduced
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| show | Magnification factor (MF)
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| SID/SOD= | show 🗑
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| show | SOD
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