Radiology SEE
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| the negative electrode (terminal) in the x-ray tube. The cathode consists of a tungsten filament wire that is set in molybdenum focusing cup that directs the cathode stream toward the target on the anode. | Cathode
🗑
|
||||
| the positive electrode (terminal) in the x-ray tube. Tungsten block, normally set at a 20-degree angle facing the cathode, embedded in the copper portion of the terminal. | anode
🗑
|
||||
| diaphragm, usually lead, designed to restrict the dimensions of the useful beam | collimator
🗑
|
||||
| either of two terminals of tan electric source. In the x-ray tube, either the anode or the cathode. | electrode
🗑
|
||||
| absorbing material, usually aluminum, placed in the path of the beam of radiation to remove a high percentage of the low energy (lower wavelength) x-rays. | filler
🗑
|
||||
| the spiral tungsten coil in the focusing cup of the cathode of the x-ray tube. | filament
🗑
|
||||
| : stage when the tungsten filament in the cathode becomes red hot and glows. Free electrons are liberated and swarm around the glowing fire to form the electron cloud. | incandescence
🗑
|
||||
| a term derived of the Greek meaning “having many colors.” Used in dental radiography to describe the x-ray beam because it is composed of many different wavelengths | polychromatic
🗑
|
||||
| the crest value in kilovolts of the potential difference of the pulsating generator. | kilovolt peak
🗑
|
||||
| the release of electrons when a material such as tungsten is heated to incandescence. Electrons are boiled off from the cathode filament in the x-ray tube when electric current is passed through it. | thermionic emission
🗑
|
||||
| Element with an atomic number of 74. High melting point makes this metal ideal for use as the cathode filament and s the anode target. | tungsten
🗑
|
||||
| curved portion of the x-ray machine that is connected to the extension arm. The tube head is suspended within the yoke and can be rotated vertically and horizontally within it. | yoke
🗑
|
||||
| the unit of intensity of an electric current produced by 1 volt acting through a resistance of 1ohm. | ampere
🗑
|
||||
| a mass of free electrons that hovers around the filament wire of the cathode when it is heated to incandescence. The number of free electron increases as the miliamperage is increased. | electron coloud
🗑
|
||||
| a path of electrical current. | electrical circuits
🗑
|
||||
| key pad or switch that activates the x-ray production process. | exposure button
🗑
|
||||
| small area on the target on the anode toward which the electrons from the focusing cup of the cathode are directed. | focal spot
🗑
|
||||
| term used when describing the intensity of the x-ray beam. Refers to the number of x-rays in the beam. | quantity
🗑
|
||||
| Term used when describing the intensity of the x-ray beam. Refers to the penetrating ability of the beam | quality
🗑
|
||||
| protective metal covering that contains the x-ray tube, the high-voltage and low-voltage transformers, and insulating oil. Attached to the flexible extension arm by a yoke. The PID attaches to the tube head at the port. | tube head
🗑
|
||||
| electronic tube located in the tube head that generates x-rays | x-ray tube
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Created by:
sarahearl
Popular Dentistry sets