DANB Flashcards
The maximum dose of radiation that, in light of present knowledge, would not be expected to produce negative effects in a life.
MPD Maximum permissible dose
The negative terminal of an x-ray tube
Cathode
Short wavelengths with high frequency, high energy and high penetrating power
Hard radiation
wavelengths that have low energy, low frequency and are unsuitable for exposing dental radiographs.
long wavelengths
Radiation wavelengths that have high frequency, high energy and high penetrating power, also known as hard radiation
Short wavelengths
the radiation comes out in all directions from the tube or tube head due to malfunction or leak.
Leakage radiation
Central beam of the x-ray tube head
Primary radiation
Time elapsed between exposure and response.
Latent period
Radiation that is deflected from its path as it strikes matter.
Scatter Radiation
Formed when the primary x-ray strikes the patient or come in contact with any matter or substance.
Secondary Radiation
The system international unit of absorbed dose of ionizing radiation.
Radiation absorbed or gray dose.
Amount of ionizing radiation absorbed in a substance.
Radiation absorde dose RAD
Part of dental x-ray unit that houses the coolidge, vacuum tube, filtres, collimator and cone
X-ray tube
the primary x-ray emitting from the x-ray tube head
cental beam
The degree of darkness on an x-ray
Density
Film used inside the oral cavity
Intraoral
Black region on the x-ray indicating where radiation passed through the tissue
Radiolucency
Area on the anode that electrons hit during x-ray production.
Focal spot
Process by wich atoms channge into negative or positive charde ions during radiation
Ionization
Determines the amount of radiation exposure the patient receives.
mAs Milliamperage seconds
Discovery by Wilhem Conrad Roentgen in 1895
x-ray
Glass Vacuum tube with electrial circut connected to each end
Hittorf crookes Tube
Negatively charged particles
Cathode Rays
Some of the deepest cells in the dermis
Basal cells
ALARA - The principle of keeping radiation exposure.
As low as reasonably achievable
Long wavelengths with low energy, low frequency and low penetrating power also called Grenz rays
Soft radiation
A radiation unit of measurements
Sievert (Sv)
A radiation unit of measurements
Roentgen Equivalent Man (REM)
The amount of radiation that ionizes one cubic centimeter of air.
Roentgens (R)
Milliroentgen (Mr)
one thousandth of a roentgen.
Electromagnetic energy
A form of energy that is the result of electric and magnetic disturbances in space
Condition of being sensitized and affected by radiant energy
Radiosensitive
Dr Otto Walkoff
Took the first x-ray 1895 (two weeks after x-rays discovered)
device used to eliminate peripheral radiation
collimator
Device on a radiagraphy machine where settings can be adjusted
Control panel
unit of electrical potential equal to 1,000 volts, dental kilovoltage is responsible for the quality of radiographs.
Kilovoltage (Kv)
Measurement unit for the electrical current.
Determines amount or quantity of electrons
Milliamperage (mA)
Computer generated “Digits (Binary numbers) to produce an image.
Digital imaging
Panoramic Technique
Developed 1959 by Dr YV Paatero
PID Position indicatior device
the open - ended tube in a dental x-ray unit “the cone”
First intraoral x-rays and new orlenas in 1896
Dr Edmond Kells
Difference between shades or colors
Contrast
Measurement unit used to compare the biological effects of different tissues by different forms of radiation.
Relative Biological Effectiveness (rbe)
Area on the anode that directs the electrons to the focal spot during x-ray production
focusing cup
the positive terminal of on electrolytic cell
Anode
