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X-ray emission
| Question | Answer |
|---|---|
| What affects x-ray quantity | x-ray intensity and factors that affect x-ray quality |
| What affects x-ray quality | pebetrability, half value layer, factors tha affect x-ray quality, types of filtration |
| mAs is | quantity of x-rays produced and amount |
| kVp is | quantity of the x-ray, intensity, power |
| What is x-ray quality | the measurement of the number of ion pairs produced in air by a quality of x-rays |
| Radiation exposure is measured in | roentgen(R), milliroentgen (mR), milligrays (mGy) |
| Factors that affect x-ray quantity are | mAs, kVp, distance, and filtration |
| Factors that affect x-ray quantity (mAs) | when the mAs increases the number of x-rays produced increaseswhen the mAs decreases the number of x-rays produced decreases |
| What are some factors that affect x-ray quality | penetrability, half value layer, factors that affect x-ray quality, and types of filtration |
| what is the quantity and mAs equation | I1/I2=mAs1/mAs2I1 and I2 are the x-ray intensity |
| Factors that affect x-ray quantity (kVp) | if the kVp were to bouble, the x-ray intensity would increase by a factor of 4If the kVp were to decrease, the x-ray intensity would decreased by a factor of 4 |
| What is the equation that affects the x-ray quantity (kVp) | I1/I2=(kVp1/kVp2)^2 |
| Factors tha affect x-ray quantity (distnace) | inverse square law I1/I2=(d2d1)^2 |
| Factors that effect x-ray quality(penetrability) | high energy can penetrate more than less energy |
| What is penetrability | the ability of x-rays to penetrate deep through tissue |
| Penetrability of an x-ray is called | x-ray quality |
| factors that effect x-ray quality (filtration) | half value layer 1-5 mm Al placed in the useful beamreduces the number of low energy x-rayreduction in the patient dose |
| HVL is the best way to | specify x-ray quality |
| Factors that affect x-ray quality (filtration) | Inherent filtration (glass window)added filtration (thin sheets of aluminum between the protective x-ray housing and the x-ray beam collimatorcollimator mirror |
| Inherent+ added filtration = | 2.5 mm Al equivalent |
| factors that affect x-ray quality (compensating filters) | helps create uniformity in density when body parts vary inthickness |
| Types of compensating filters | wedge filtertrough filterconic filterbow tie filter |
Created by:
eliza alvarez
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