dental radiography part 1 Flashcards
Who discovered X-rays and known as the father of Xrays
wilhelm conrad roentgen
took the first dental radiograph on himself
dr otto walkhoff
took the first dental radiograph using a living person
Dr. C. Edmund kells
form of energy carried by waves or a stream of particles through space or material
radiation
high energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube
X-radiation
a beam of energy that has the power to penetrate substances and record image shadows on receptors
X-ray
radiology
the science or study of radiation as used in medicine
image produced on a receptor by exposing the receptor to ionizing radiation and then processing it
radiograph
ALARA stands for
As Low As Reasonably Achievable
Provides regulation and standards for, equipment, facilities, quality insurance, protection of operator, patient, other workers
Safety code 30
The radiation protection officer ensures that
all X-ray machines are safe.
X-ray machines are prescribed by regulations
what is physics
scientific study of matter and energy
what is matter
Anything that occupies space and has form or shape
the matter is composed of
atoms grouped together in specific arrangements called molecules
Energy is defined as
the capacity to do work.
The atomic structure consists of two parts
central nucleus; protons+neutrons
orbiting electrons
central nucleus
The dense core of the atom occupies very little space. include protons, neutrons
The energy that holds the nucleus together is called
nuclear- binding energy
orbiting electrons
Negatively charged
Have little mass
The energy holding electrons, negatively charged particles, in their shells are known as
electron-binding energy
the number of protons and neutrons in the nucleus of an atom determines
its mass number
protons+neutron = mass number
the number of protons inside the nucleus equals the number of electrons outside the nucleus and determines
the atomic number
protons= electrons—-> atomic number
electrostatic force
the attraction between protons and electrons
centrifugal force
pulls electrons away from the nucleus
the process by which certain unstable atoms or elements undergo spontaneous disintegration or decay in an effort to attain a more balanced nuclear state
radioactivity
ionization
production of ions, or the process of converting an atom into ions
particulate
tiny particles of matter that process mass that travel in straight lines and at high speeds
beta particles
electrons emitted from. the nucleus of radioactive atoms
cathode rays
high speed electrons that originate in an x-ray tube
wavelike energy (without mass) through space or matter can be ionizing or nonionizing radiation
electromagnetic
made up of protons that travel through space at the speed of light in a straight line with a wavelength motion
electromagnetic radiation
velocity
the speed of the wave
wavelength
the distance between the crest of one wave and the crest of the next
frequency
number of wavelengths that pass a given point in a certain amount of time
if the wavelength is short
the frequency will be high
if the wavelength is long
the frequency will be low
