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Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
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Name 8 factors that affect recorded detail.
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1. Motion
2. SID 3. OID 4. Focal Spot Size 5. Film/Screen Speed 6. Film/Screen Contact 7. Noise (e.g. Quantum Mottle) 8. Thickness of Patient Part |
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When SID (source to image receptor distance) increases, detail _________.
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Increases
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When OID (object to image receptor distance) increases, detail _________.
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Decreases
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When Focal Spot Size increases, detail ________.
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Decreases
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When film/screen speed increases, detail ________.
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Decreases
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Recorded detail can be defined as:
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The degree of geometric sharpness or accuracy of the structural lines actually recorded in the image (resolution tool is used).
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spatial resolution is synonymous with ________.
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Recorded detail
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A higher amount of line pairs per millimeter affects detail how?
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By increasing it
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Actual focal spot can be defined as:
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The spot on the anode where beam hits.
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Which side of the tube provides the most intense beam?
Detail is always greatest at the ______ side and cathode side has greater __________. |
Cathode ( - )
Anode ( + ) Blur |
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*** You can find your new mAs with this formula... (mAs/distance formula, exposure maintenance formula)
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new SID 2 (squared)
old SID X old mAs |
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*** To find new seconds (when doing mAs/distance conversions), use this formula:
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new mAs
new mA |
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*** What are the only 3 things (technical factors) do we need to consider when finding which set of technical factors will produce the greatest amount of recorded detail?
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SID, OID, and Focal Spot Size
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What 3 qualities of a film screen determine how much detail will be displayed?
hint: phosphors
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1. Size of phosphor in
screen
2. Phosphor layer
thickness
3. Phosphor concentration
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How do you determine the magnification factor?
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SID
SOD |
