Medical Termilogy Review Flashcards
Anode
The positive electrode in the x-Ray tube /glass envelope
Alara concept
A radiation protection concept that states all exposure should be kept ass low ass reasonable archievable
Contrast
Differences in densities on adjacent areas of a radiograph
Density
The overal blackness on radiograph
Frequency
The number of wavelength passing through a fixed point per given period of time
Ion
An electrically charge particle
Milliamperes
mA) a unit of measurement used to determine the amount of electrical current ;1mA is equal to 1/1,000 an ampere
Photon
Small bundle of pure energy that has no mass or weight
Radiograph
A recorder image on photographic
Radiolucent
Dark portion of a radiograph that represent soft tissue ( for example dental pulp) that allow X-ray to pass through space and Aire are also radiolucent
Atom
The basic unit of all matter
Cathode
The negative electrode in the X-ray tube/ glass envelope
Ionization
The process through which electron are lost from the shell of an atom
Ionizing radiation
Radiation that is capable of producing ions by adding or removing electrons from the shell of an atom
Primary radiation
Initial radiation produce at the tungsten target that exist the tube head
Leakage radiation
Radiation that escapes or leaks out of the tube head
Radiolucent areas
Dark portion of a radiograph that represent soft tissues for example dental pulp that allow X-rays to pass through space and air are also radiolucent area
Radioopaque area
Light or white portion of a radiograph that represent areas of dense tissue that absorbs X-rays
Scatter radiation
A form of secondary radiation that occurs once the primary beam has interacted with matter and then is deflected off a differents direction
Secubdary radiation
Occurs when the primary beam come in contact with and passes through any type of matter
Wavelength
Distance between the crest or high point of the radiation waves
Tungsten target
Portion of the anothe struck by electrons focal spot
X-radiation
High- energy ionizing electromagnetic radiation
Electromagnetic radiation
The production of a wave like energy through space and matter
Automatic processor
Machine tha automatically processe film through each stage of the developing
Beam alignment device
Device used to position the primary beam by aligning the position- indicating device
Cassette
Used to hold extra oral film during exposure
Cephalometric radiograph
Profile of the head and face showing both bone and soft tissue
Dental film holder
A device used to stabilize the film in the pacient mouth
Duplicating film
Film used specifically for duplicating or copying existing radiograph
Emulsion
A coating on the film that gives it greater sensitivity to radiation
Extraoral film
Film designed to be used outside of the mouth during X-rays exposure
Film
The term used to describe the film packet and it’s components prior to it being developed or processe
