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6 Cards in this Set
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- Controls the penetrating power of the x-ray beam. - When increased the electrons move faster. Faster they move, the more energy will be released as x-ray photons. - The higher the energy, the more powerful the penetrating primary beam. |
Kilovoltage (kV) |
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- The current that heats the filament in the cathode of the x-ray machine is measured in millamperes. - Increasing the temperature of the filament the number of electrons will increase and as result so will the number of x-rays. |
Milliamperage (mA) |
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- Refers to the distance between the target and the surface of the x-ray film. - Distance of ________ affects the quantity of x-rays reaching the film. - The greater the distance is, the more the beam spreads out and therefore fewer x-rays reach the film. |
Film Focal Distance (FFD) |
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- Describes the range of exposures that will ensure a diagnostic image is possible. - If a film has wide ______ there is a greater range of exposure factors that will produce a diagnostic image. |
Latitude |
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- Describes the amount of blackening seen on a radiographic film. - This degree of blackening is related to the specific gravity and the atomic number of the subject under examination. |
Density |
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- The difference in density, i.e. the degree of blackening between two adjacent structures. - If the image has lots of grey, but very little black and white it is described as being a low _____ image. - If there is little grey, but lots of black and white, the image is said to be high _____ (soot and whitewash). |
Contrast |
