| Term | Definition |
|---|
| X-radiation | Produced by a stream of electrons bombarding a target |
| Source of electrons, target, housing | 3 things needed in order to produce X-rays |
| Cathode | Wire filament within a focusing cup |
| Cathode | Provides "source of electrons" |
| Cathode | Negative terminal of x-ray tube |
| Anode | Metal disc; "target for electrons" |
| Anode | Positive terminal of the x-ray tube |
| Vacuum glass envelope | Made of pyrex glass |
| Vacuum glass envelope | Houses cathode and anode |
| Tungsten wire, molybdenum, nickel | Cathode is made of a small coil of ________ ____ filament mounted in a ___________ or ______ focusing cup. |
| Thermionic emission | The liberation of electrons or ions from a substance as a result of heat |
| 5-10, 5, thermionic emission | By applying filament current ____ volts (~_ amps) electrons will be "boiled off" (2200 C); this process is called __________ ________ |
| Milliamperage setting (mA) | Controls the cathode |
| mA, temperature, number of electrons | The higher the __, the higher the ___________, the higher ______ __ _________ are boiled off |
| high melting point, flexible | Tungsten is used for the filament due to its ____ _______ _____, and is extremely ________ to form a helix |
| 2, large, small, high, low | Most x-ray tubes have _ filaments, a _____ and _____ (large parts, ____ mA; small parts, ___ mA), to accommodate large and small focal spots |
| Source of electrons, directs, focuses | A cathode provides the ______ __ _________ as well as ______ and _______ (compresses) electrons to anode target |
Combine with other sets
Share on Facebook
Share on MySpace