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17 Cards in this Set
- Front
- Back
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Multi thickness / film exposures are designed to do what?
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make one exposure of a part with varying thicknesses
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The thinnest material of a part will have what on the film?
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Maximum H&D (Density)
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The maximum thickness of a part will have what on the film?
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minimum H&D (density)
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The plastic overlay can be used to show what?
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the thickness range that will be covered by one radiograph
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Using the plastic overlay what increases as the kV increases?
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thickness ranges
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On the plastic overlay the exposure times are taken off the what?
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2.0 H&D line
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What is the first step for plastic overlay construction?
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select the minimum and maximum densities desired
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What is the second step for plastic overlay construction?
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obtain the LRE's using the H&D chart
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What is the first step for multi thickness overlay exposures?
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find your thinnest and thickest sections of the part
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When performing a multi thickess overlay exposure and your kV line does not cover the thickest section what must be done?
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multi- film technique must be used
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After the kv line has been establish for multi-thickness overlay exposures what must be determined next?
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exposure mAs
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For multi-thickness overlay exposures, the exposure MAS or working MAS is to be used in what?
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in all other calculations
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When is the multi film technique used?
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when the material thickness cannot be covered by the multi thickness overlay in one exposure
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In the multi film technique, instead of making two or more exposures, a single exposure will be made using what?
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films of different speeds loaded together
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In the multi film technique why must you drop back two kv lines?
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help prevent burning out extremely thin materials and will provide higher amount of energy needed to expose the slower film speeds
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The multi film technique is used with what chart?
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film relative film speed chart
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When loading multiple films where is the slowest film placed?
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closest to the part
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