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Stack #56572
CH 3 Wallace Size Distortion
| Question | Answer |
|---|---|
| The distace between the x-ray tube and film | SID |
| another name for SID | focus film distance |
| the distance between the object and film | OID |
| OID is also known as | OFD |
| The distance between the x-ray tube and object | SOD |
| formulas for calculating distances are | SID=OID+SOD OID=SID-SOD SOD=SID-OID |
| what is size distortion | the misrepresentation of the true size of the image as compared to the object |
| for least magnification you woulds use a ________ OID, and a _______ SID | short, long |
| to avoid magnification where would you place the object of interest | close to the film |
| A long SID produces the _________magnification | least |
| What is the formula for magnification | SID/SOD or Image/Object |
| Formula for percent of magnification is | Image minus object divided by object times 100 |
| four radiographic qualities | denisty, contrast, recorded detail, and distortion |
| What affects recorded detail | SID and OID |
| SID increases recorded detail | increases |
| OID increases recorded detail | decreases |
| SID affects | density |
| OID affects | density and contrast |
Created by:
amynae
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