X-Ray Emission
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| Factors that effect x-ray emission | show 🗑
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| X-ray quantity | show 🗑
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| show | -Primary controlling factor for quantity.
- is directly proportional to the x-ray quantity.
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| show | I1=mAs1
I2 mAs 2
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| kVp | show 🗑
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| show | I1=(kVp 1)2
I2=(kVp 2)2
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| show | A change in kVp by 15% will have the same effect on optical density as changing the mAs.
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| Increase kVp 15% = | show 🗑
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| Decrease kVp 15% = | show 🗑
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| Distance is expressed mathematically as: | show 🗑
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| Distance | show 🗑
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| show | -Filters out low energy x-ray beams and hardens the x-ray beam.
-Reduces patient dose to low-energy, non informative x-rays.
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| X-ray Quality | show 🗑
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| Hard x-rays | show 🗑
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| Soft x-rays | show 🗑
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| show | -Chief controlling factor of quality.-Chief controlling factor of quality.
-Increasing kVp increases the quality of the x-ray beam.
-Increasing kVp increases the quality of the x-ray beam.
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| Half-value Layer | show 🗑
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| Filtration | show 🗑
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| Inherent Filtration | show 🗑
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| Added Filtration | show 🗑
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| show | A type of added filtration in which the thickness of the compensating filter coincides with the body part to be radiographed.
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| show | Used for body parts that are thick at one end and thin at the other.
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| show | Used mainly for the chest medistinum.
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| show | Used in CT to compensate for head or body shape.
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| Conical Filters | show 🗑
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| show | Is proportional to mAs.
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| show | Is proportional to the kVp^2.
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| ______________ is inversely proportional to the square of the distance from the source. | show 🗑
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| When SID is increased, _________ must be increased by SID^2 to maintain constant exposure to the image receptor. | show 🗑
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| Adding filtration to the useful x-ray beam reduces _______________. | show 🗑
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| show | Attenuation.
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| show | Is the best method for specifying x-ray quality.
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| show | Can be identified by kVp or filtration, but HVL is most appropriate.
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| Increasing ___________ filtration increases the quality of an x-ray beam. | show 🗑
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| show | Filtration
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| Added filtration | show 🗑
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