Term
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Definition
| This results from the glass or metal envelope of the x-ray tube and the window in the x-ray tube housing. It is usually equivalent to approximately 0.5 mm Al. |
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Term
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Definition
| This is the result of placing an absorber in the path of the x-ray beam. The absorber, usually 1 to 3 mm Al, is positioned between the collimator and the tube housing. |
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Term
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Definition
| This has nothing to do with patient dose; compensating filters are used specifically for shaping the x-ray intensity over the beam receptor is more uniform and results in more uniform optical density. |
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Term
| What are the 3 types of x-ray beam filtration? |
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Definition
| Inherent filtration, Added filtration, and Compensating filters |
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Term
| The inherent friltration in a general-purpose radiographic x-ray tube is usually equivalent to: |
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Definition
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Term
| The equivalent added filtration provided by a conventional light-localizing, variable-aperture collimator is closest to: |
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Definition
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Term
| The purpose of a wedge filter in diagnostic radiology is to produce: |
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Definition
| A uniform x-ray beam intensity at the image receptor |
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Term
| The primary purpose of adding filtration to an x-ray beam is to: |
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Definition
| Remove low-energy electrons |
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Term
| An x-ray beam filter has the greatest effect on dose reduction to the: |
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Definition
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Term
| X-rays of higher maximum energy can be obtained by doing which of the following? |
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Definition
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Term
| The light-localizing, variable-aperture collimator contributes: |
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Definition
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Term
| If 5 mm Al filtration is added to the x-ray tube: |
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Definition
| Optical density will decrease |
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Term
| An x-ray beam can be made harder by increasing: |
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Definition
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Term
| When filtration is added to a normally filtered x-ray beam, the x-ray emission spectrum will: |
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Definition
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Term
| Added filtration does what? |
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Definition
| Protects the patient from unnecesary radiation exposure |
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Term
| Inherent filtration does what? |
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Definition
| Helps harden the x-ray beam |
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Term
| To produce low inherent filtration in an x-ray beam: |
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Definition
| A thin section of glass is used |
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Term
| Wedge filters are used to: |
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Definition
| Obtain uniform optical density |
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Term
| During mammography, what type filtration is desirable? |
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Definition
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Term
| When added filtration is increased: |
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Definition
| X-ray quality is increased |
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Term
| If a radiographic tube has 0.5 mm Al inherent filtration and 2.0 mm Al added filtration, adding 1.0 mm Al will do what? |
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Definition
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Term
| With tube age, inherent filtration will: |
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Definition
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Term
| An x-ray tube has a total filtration of 3.0 mm Al and an HVL of 2.5 mm Al, and emits 180 mR. The addition of 1.0 mm Al will: |
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Definition
| Increase the quality of the beam |
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