Ch.28 and 29
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The __________ referred to the sharpness of structural line recorded in the image. | show 🗑
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| show | Image formation
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| show | Optimal geometric quality.
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| show | Recorded detail
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| The amount of _______ is a result of the relationship among the size of the focal spot, SID and OID. | show 🗑
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| A __________ cannot be the exact reconstruction of the anatomic structure. | show 🗑
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| show | Individually or in combination
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| show | Filament size
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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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| show | Detail
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| As focal spot size Increases, unsharpness ________ and recorded detail _______ | show 🗑
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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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| When a small focal spot is used, the ________ created during x-ray exposure is concentrated in a small area and could cause tube damage. | show 🗑
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| You have to weigh the importance of improved recorded detail for a particular exam or anatomic part against the amount of __________ used. | show 🗑
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| ______________ are equipped with safety circuits that prevent an exposure from being make if that exposure will exceed the tube loading capacity for the focal spot size selected. | show 🗑
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| ____________ made just under the limit over a long period can still jeopardize the life of the x-ray tube. | show 🗑
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| show | Distance.
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| Because of the _________________, A geometric relationship exist among the source of x-rays, the object, and the image receptor. | show 🗑
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| Increasing the SID, ______ The amount of unsharpness and ________ The amount of recorded detail in the image. | show 🗑
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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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| show | Standard
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| Except for chest and cervical spine exams, a 40 inch or 48 inch SID is the _____ | show 🗑
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| In addition to the SID, the OID also affects the amount of | show 🗑
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| show | 0
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| But there is always some ______ created between the area of interest and the image receptor. | show 🗑
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| show | Diverge.
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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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| show | Geometric unsharpness
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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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| The relationship among the variables of focal spot size and distance can be demonstrated by the geometric unsharpness _______ | show 🗑
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| Focal spot size X OID / SOD = | show 🗑
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| show | Focal spot size
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| The distance between the object ( Area of interest) And the image receptor. | show 🗑
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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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| show | Eliminated
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| show | Blur
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| show | Detail
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| show | Voluntary - within the patients control or involuntary - outside the patients control ex. Peristalsis
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| Most motion results from the patient _____ | show 🗑
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| How would you eliminate emotion? | show 🗑
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| show | Increase in the objects image size
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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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| show | OID
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| show | Increases
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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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| Distortion results from the radiographic ________ and either the size magnification or shape of the anatomic part | show 🗑
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| show | Reduced
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| The _______________ indicates how much size distortion is demonstrated. | show 🗑
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| show | MF
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| SID - OID= | show 🗑
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