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11 Cards in this Set
- Front
- Back
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What can a film characteristic curve also be called?
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H&D curve or a log relative exposure(LRE) chart
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What is a film characteristic curve designed for?
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density corrections, film changes and processing changes
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film characteristic curve shows the relationship between what?
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exposure applied and the resulting density
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if the technique has already been shot and did not produce the required results, the exposure must be what?
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corrected before any additional changes can be made
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If you had to make changes to your entire technique would be changed first?
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the SFD
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If distance doubles, what will this do to the MAS?
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The new MAS will quadruple the original MAS
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If you are going from auto processing to manual what must be done to the MAS?
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multiply MAS by the ALRV
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If your exposure requires a piece of film is larger than standard size what must be determined?
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the SFD that will allow your xrays to properly cover the part or film being inspected in one exposure
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What is the formula for the cone of emission?
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Tan(theta/2) x SFD = Radius
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How is the cone of emission formula re-arranged to solve for the SFD?
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SFD= R/Tan(theta/2)
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How can the R be determined?
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a^2 + b^2 = c^2 Solve for c which will be equal the diameter of the area of coverage therefore the R will be one half of the diameter
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