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| When electron charges build and begin to oppose one another at the filament, this is called |
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| What type of charge does the anode have? |
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| The practice of reducing the effective focal spot to increase image resolution. This also allows for a larger impact areas for the electrons on the target track, with a smaller EFS. |
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Definition
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Term
| Why is a rotating anode more desirable than a stationary anode in general radiography rooms? |
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Definition
| higher efficiency for heat dissipation |
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Term
| An electron accelerating toward the anode from the thermionically emitted cloud is referred to as a/an |
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| An x-ray photon is first produced |
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Definition
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Term
| As the average energy of an x-ray beam increases, quality is affected in the following way: |
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Definition
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Term
| What type of target interaction results from the incident electron ejecting an inner-shell Tungsten target electron? |
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Definition
| characteristic interaction |
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Term
| The majority of the useful x-ray beam is composed of mainly |
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Definition
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Term
| At what kV will characteristic x-rays begin to be produced for diagnostic purposes? |
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Definition
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Term
| Characteristic x-rays that contribute to the useful beam, must be produced as a result of an interaction with the: |
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Definition
| K-shell electron of the Tungsten atom |
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Term
| A K-shell electron(69.5 keV) has been ejected and replaced with an L-shell electron(12.1 keV). What is the resulting energy of the x-ray photon? |
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Definition
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Term
| f an exposure is made and a K-shell electron is ejected and replaced with an N-shell electron(2.8keV), what is the x-ray photon's energy? |
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Definition
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Term
| When a K-shell electron is ejected, the x-ray photon energy will be highest when filled with a __ - shell electron. |
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Definition
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Term
| At 60kV, approximately __% of the useful beam is made from brems interactions. |
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Definition
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Term
| The maximum possible energy of an x-ray photon may not exceed |
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Definition
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Term
How could you double the number of incident electrons produced?
1. double your mA
2. double your time
3. increase your kVp by 15% |
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Definition
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Term
Which of the following will occur as a result of filtration?
1. increase in the quality of the beam
2. low energy photons removed from the beam
3. elimination of high-energy photons |
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Definition
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Term
| A low energy photon is said to have a ___ frequency and a ___ wavelength. |
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Definition
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Term
| X-ray tubes operating at 70 kVp or above, must have a total filtration of: |
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Definition
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Term
| The amount of absorbing material required to reduce the intensity of the beam to half its original value is called the |
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Definition
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Term
| Suppose a HVL is determined for an x-ray beam. If the kVp is increased, What would change about the HVL for that beam? |
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Definition
| It would increase, because more absorber material would be necessary to reduce the beam to 1/2 its original intensity. |
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Term
| Inherent filtration is provided by which of the following? |
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Definition
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Term
| Inherent filtration is provided by which of the following? |
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Definition
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Term
| When utilizing a compensating filter, the thickest part of the filter should be placed |
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Definition
| at the thinnest part of the anatomy |
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Term
| An x-ray tube has inherent filtration of 1.0 mm Al and added filtration of 1.0 mm Al. What is the total filtration value for this x-ray tube? |
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Definition
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Term
How will the number of photons reaching the image receptor be affected if filtration is added?
(assuming no compensation of other factors is made). |
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Definition
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Term
| How does an emission spectrum change after an increase in kVp only? |
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Definition
| Shift up in amplitude and a shift to the right |
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Term
| How does an emission spectrum change when mA is the only thing that is increased? |
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Definition
| Increase in amplitude only |
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Term
| Which of the following is a true statement? |
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Definition
| An x-ray beam with 60 kVp contains no characteristic rays of diagnostic value. |
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