Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
IMG 114 - CH 2
| Question | Answer |
|---|---|
| The target of an x-ray tube is made of what metal? | Tungsten |
| Why is an x-ray tube immersed in oil? | Insulation |
| What causes most x-ray failures | Excessive heat |
| What types of primary radiation is produced when the x-ray tube is below 70? | Bremsstrahlung |
| Which part of the x-ray tube has the filament wires and focusing cup | Cathode |
| As kilovoltage is applied, the electrons are accelerated toward which part of the x-ray tube? | Anode |
| Which kVp and mAs combination produce the least load on an x-ray tube? | High kVp and low mAs |
| What is required of a metal target in an x-ray tube? | 1) Ability to conduct heat2) High atomic number3) High melting point |
| What increases the penetrating power of the x-ray tube? | kilovoltage |
| What is the area of the x-ray target called that is struck by electrons? | Actual focal spot |
| When electrons strike the target of an x-ray tube, most of their energy is converted to what? | Heat |
| What is the negative terminal x-ray tube? | Cathode |
| What are the x-ray tubes called that have 2 filament wires? | Dual focus tubes Dual Filament |
| How many kilovolts is equal to 75,000 volts? | 75kV |
| The formula, mA x kVp x time(s) x generator factor; is for what? | Finding heat units |
| What is used to focus the electron stream toward the target of the anode? | Focusing cup |
| Electrons travel in an x-ray tube from _____ to _____ | Cathode, anode |
| Which of the following is filtration that is manufactured into the x-ray tube | Inherent Filtration |
| What determines the quantity of the electrons that will be accelerated across the x-ray tube? | mAs and Heating of the filament |
| During thermionic emission a cloud of electrons surround the filament. What is the electron cloud called? | Space Charge |
| How fast do high speed anode rotate? | 3,000 to 10,000 RPM |
| As electrons are accelerated across the x-ray tube, they are referred to as what? | Tube current |
| What is the purpose of the anode in an x-ray tube | Decelerates electrons |
| What is the purpose of a window in an x-ray tube? | For the emission of x-ray |
| What effect will increasing the kVp have on the production of an x-ray | Energy of beam increases |
| When will a space charge be present in the x-ray tube when exposing a patient? | Whenever the rotor engaged |
| Why is an x-ray tube made of Pyrex glass? | To better withstand heat |
| When electrons strike the anode of an x-ray tube, how much of their energy is converted to x-rays? | Less than 1% |
| Which parts make up the cathode end of the x-ray tube? | Filament and focusing cup |
| In the rotating anode x-ray tube, what coats the tungsten disk? | Tungsten rhenium alloy |
| During an exposure, what electrical charge is placed on the anode? | Positive |
| What is the process of "boiling off" electrons called? | Thermionic Emission |
| The filament wires in radiographic tubes are made from what metal? | Tungsten |
| Which is not related to the other?1) Rotor2) Target3) Filament 4) Tungsten Disk | Filament |
| In what unit is filament current measured | Amperage |
| Why is the x-ray tube encased in a lead housing? | Prevent leakage of radiation |
| The instantaneous production of light resulting from the interaction of some type of energy and some element or compound is__________ | Fluorescence |
| Radiation that has both electrical and magnetic properties is __________ | Electromagnetic radiation |
| What are the 4 forms of energy? | electrical energy, kinetic energy, thermal energy and electromagnetic energy. |
| Electrical energy applied to an x-ray tube is transferred into ______ and ________ | Heat, X-ray |
| Represents the number of waves passing a given point per given unit of time | Frequency |
| Represents the distance between two successive crests or troughs | Wavelength |
Created by:
kmcnstnt