Term
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Definition
| Xray's are produced at what part of the x-ray tube |
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Term
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Definition
| The filament and the anode target are both made of ? |
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Term
| Milliamperage and exposure time |
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Definition
| In a dental x-ray tube, two factors affect the QUANTITY of x-ray photons produced and NOT ENERGY of the photons... they include?? |
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Term
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Definition
| An exposure of time of 0.4 seconds is equal to how many impulses? |
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Term
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Definition
| compared to visible light, x-rays have which property? |
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Term
| exposure time too short, PID lenth too long, kVp setting too low, mA setting too low |
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Definition
| radiograph comes out of the processor looking TOO LIGHT, what could cause this error? |
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Term
| increase kVp, mA, exposure time and make PID longer |
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Definition
| How could you fix an image that is too light |
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Term
| absorb low energy xray photons |
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Definition
| what is the function of the added filtration in an x-ray unit |
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Term
| higher kVp instead of lower kVp |
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Definition
| What is associated with increased transmission of x-rays through the patient |
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Term
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Definition
| if you increase the PID without changing the exopsure time it will cause the radiograph to become |
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Term
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Definition
| the difference in density (darkness) between different parts of the image such as subjuct contrast, film contast, and viewing conditions |
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Term
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Definition
the degree of darkenss on the processed radiograph
dark = high light = low |
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Term
| PID length too short, exposure time too long, mA setting too high, and kVp setting too high |
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Definition
| what causes the radiograph to come out of the processor looking too dark |
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Term
| lower kVp instead of higher kVp, high absorbing material, high destity of atoms, great thickness of absorbing material |
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Definition
| What is associated with increased absorption of xrays in a patient |
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Term
| (new exp. time)/(old exp. time) = (new PID)squared/(old PID)squared |
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Definition
| What is the incerse square law |
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Term
| is polyenergetic, compromises most of the xrays in the tube |
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Definition
| what is true about the brehmsstrahlung radiation |
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Term
| increase kVp and added filtration |
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Definition
| what component of the xray unit most directly controls the energy level of the primary beam of xrays |
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Term
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Definition
| which component of the xray unti is made of molybdenum |
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Term
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Definition
| which of the following position indicating devices results in smallest radiation to the patient |
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Term
| absorb low energy x-rays from the primary beam |
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Definition
| the funtion of the added filtration unit is to |
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Term
| EM radiation with shorter wavelengths then visible light |
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Definition
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Term
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Definition
| thermionic emission occurs at the _______ of the xray tube |
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Term
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Definition
| what percent of the interactions of electrons and the anode produces x-rays?? |
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Term
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Definition
| what increases the enrgy of the xray beam? |
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Term
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Definition
| if you make a radiographic expsure with 65 kVp instead of 80 kVp, you will produce and image with a _______ subject contrast, which is also called ____ grey scale contrast |
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Term
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Definition
| detnal caries represents a replacement of the normally hard tooth material with soft, rotten material. for this reason caries are _______ and appears ______ on a radiograph |
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Term
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Definition
| degree of darkness on a radiographic image |
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Term
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Definition
| difference in darkness between different parts of the image |
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