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14 Cards in this Set
- Front
- Back
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What is Compton effect?
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Incoming x-ray photon strikes a loosely bound outer shell electron. Most common
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What is Coherent scatter?
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Target atom becomes energized or EXCITED and releases extra energy as scatter
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Incoming x-ray photon strikes an inner shell electron:
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Photoelectric effect
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What affects the quantity of scatter radiation fog on a radiograph?
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Field size and kVp
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If the amount of irradiated tissue increases, what happens to scatter radiation fog?
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Scatter radiation fog increases
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As kVp increases, scatter radiation fog also increases... True or False?
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True
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What is the principle source of scatter radiation in radiography
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The patient
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As compared to an 8:1 grid, a grid with a 12:1 ratio will
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Require more exposure to make a satisfactory radiograph
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As a general rule, a grid should be employed when the part thickness is greater than?
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12cm
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Scatter Radiation reduces what two things?
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reduces contrast and visability of detail
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higher kVp effects scatter how?
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results in more scatter radiation
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What is a grid and what does it do?
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it is a device that is placed between the patient and the IR... it absorbs scatter radiation
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How does OID effect scatter radiation
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Increasing the OID will decrease the intensity of scatter radiation at the film
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A reduction in field size will increase the scatter radiation fog on the radiograph. True Or False?
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False. Field size significantly affects the volume of tissue irradiated. a reduction in field size will decrease the scatter radiation fog on the radiograph
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