Chap5-6 assignment
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| Tungsten is used to coat the anode disc because it | has a high atomic number.
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| The best situation for less heat production and a quality image is to have a: | large actual focal spot and small effective focal spot.
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| The advantage to using a larger actual focal spot is | higher exposures can be used.
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| With a rotating anode, the focal spot becomes a focal | track.
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| The size of the actual focal spot depends on | the size of the cathode filament being used.
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| The effective focal spot is the | origin of the x-ray beam as seen from below the tube.
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| Molybdenum | is a poor thermal conductor.
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| The primary advantage of a rotating anode is that it allows | greater heat capacity at the anode.
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| The relationship between the actual focal spot size, effective focal spot size, and anode target angle is called | the line-focus principle.
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| One of the reasons that molybdenum is used in rotating anodes is because it is | light but strong.
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| Which primary exposure factor influences both the quantity an quality of x-ray photons? | kVp
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| Characteristic photons are represented by a __________ emission spectrum and Bremsstrahlung is represented by a _____________ emission spectrum. | discrete; continuous
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| At 100 kVp, the radiation produced is : | 15% characteristic and 85% bremsstrahlung
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| Total filtration in the x-ray beam includes_______. | Inherent filtration
Added filtration
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| Which type of target interaction is responsible for most of the x-rays in the diagnostic beam? | breamsstrahlung
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| This interaction involves a cascade similar to dominos falling. | characteristic
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| What percentage of the kinetic energy is converted to X-rays when moving electrons strike the anode target? | 1
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| According to the line focus principle, as the target angle decrease, the _________. | effective focal spot size decreases
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