dental radiation Flashcards
dosimeter badge
monitoring device used to determine the amount of occupational exposure to radiation
ALARA
as low as reasonably achievable. To receive the smallest amount of radiation possible
dental tubehead must be equipped with
aluminum filters, lead collimators, PID (position-indicating devices)
what does the aluminum disk do
removes low energy, long wavelengths x-rays
what the collimator does
Lead plate. Used to restrict the size and reduce the amount of radiation
rectangular exposes
60% less tissue than a circular
theprimary radiation beam must be collimated in size at the end of the applicator to a circle not more than
7 cm (2.75 inches)
lead apron
used for all intraoral & extraoral radiographs
thyroid collar
used for only intraoral, not extraoral because it interferes with radiograph resulting in a non-diagnostic image
t/f; digital image reporters require less radiation exposure than traditional films
true
t/f; when digital sensors are not used SLOW film is recommended to reduce patients exposure
false, Fast film
which film is the fastest intra oral film available
f -speed
f-speed has
20% reduction in exposure over E-speed
F-speed also has
60 % reduction over D-Speed
long cone =
less exposure to the patient
mA cant go over 15 because
it will get too hot
X-radiation beam intensity decreases
as the distance increases
staff radiation protection - position
never stand in direct line of the primary beam
staff radiation position - distance
minimum 2.75m/ 9ft away
staff radiation position- shielding
barries, aprons, walls
radiation
form of energy carried by waves or a stream of particles
electromagnetic radiation
wavelike energy without mass
ionization radiation
radiation-producing ions by removing or adding energy to an atom
frequency
number of wavelengths passed over a given time
wavelength
distance between the crest of one wave and the crest of the next
A photographic image produced on an image receptor by Xrays through teeth and related structures
radiograph
the production of radiographs by exposure to film to Xrays
radiography
study of radiation as used in medicine. Deals with the use of Xrays, radioactive substances, and other forms of radiant energy used to treat or diagnose disease
Radiology
a beam of energy that has the power to penetrate substances and record image shadows on photographic film or digital sensors
x-ray
your image is dark and lacks contracts, how would u adjust mA and Kvp
decrease Kvp, decrease mA
