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x-ray tube
and support system
| Question | Answer |
|---|---|
| Which of the following is NOT a typical support system used in Radiography? | D. C-arm support system |
| The protective housing of an x-ray tube is designed to: | A. Control scatter radiation |
| X-rays are emitted isotropically, which means: | A. In all directions |
| Radiation that leaves the x-ray tube at areas other than the window is referred to as: | C. Secondary radiation |
| The original x-ray tube was called a: | A. Crookes tube |
| The modern x-ray tube is called a: | B. Coolidge tube |
| The negative side of the x-ray tube is the: | B. Cathode |
| Thermionic emission occurs when: | C. The filament is heated and outer shell electrons are boiled off. |
| The coil of wire that is the source of burned off electrons is the: | A. Filament |
| The purpose of the focusing cup is to: | A. Focus electrons toward the anode. |
| Filament current is measured in: | A. Amps, milliamps |
| Filament currents are in the range of: | B. 3-6 milliamps |
| The boiled off electrons form a cloud referred to as a(n): | C. Space charge |
| Most x-ray tubes have: | B. 2 focal spots. |
| X-ray tubes are enclosed in: | A. Glass or metal enclosure |
| Leakage radiation must not exceed _ mGy/hr at _ meter when operated at maximum conditions. | A. 1, 1 |
| Which of the following doesn't pertain to the cathode: | D. Positively charged |
| An x-ray tube that has 2 focal spots is called a: | B. Dual focus |
| Which of the following is NOT a type of anode? | C. Vibrating |
| Which of the following is NOT a function of the anode? | D. Source of electrons |
| During x-ray production, % is heat and % is x-rays. | B. 99, 1 |
| The target in a stationary anode is: | A. Tungsten-rhenium alloy |
| The target in a rotating anode is: | C. Tungsten in copper block |
| Which of the following is NOT a benefit of a rotating anode? | C. Less expensive initially |
| What controls anode rotation? | A. Electric motor |
| The effective focal spot is usually characterized by: | A. Oval |
| The anode heel effect states that radiation intensity is greater on the cathode side of the x-ray field. | True |
| X-ray intensity can vary up to % across the primary beam. | D. 100 |
| Which chart shows how long an anode needs to cool after a particular level of heat has been received? | B. Anode cooling chart |
| Thermal energy is measured in heat units or: | C. Joules |
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