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