Week One Radiology for 11/16 Test
Interproximal, or cavity detecting radiographs are:
BWX (Bitewings)
the traditional unit for measuring x-ray exposure in air is termed a
REM
what item of the X-ray unit restricts the radiation beam to 2.75" at the end of each cone?
a collimator
weak radiation leaving the tube during exposure is prevented by use of an
aluminum filter
an atom that has lost an electron is called
an ion
Which films are used to examine the crowns of both maxillary and mandibular teeth on one film?
bitewing
how does the temperature of the processing Solutions affect the X-ray film?
causes the film to develop slower or faster
radiation is considered harmful because it is:
cumulative
use of a faster speed x-ray film would help to protect the patient from exposure by allowing the operator to ________ the exposure time
decrease
what is the negatively charged particle that is responsible for producing Dental radiographs?
electrons
the amount of radiation exposure an individual receives varies on
film speed
radiation injuries that are not seen in the person irradiated but that occur in future generations are termed
genetic
the speed of electrons through a circuit is referred to as
kilovoltage
what type of radiation can be controlled and eliminated?
leakage radiation
the amount of electrons needed to produce a diagnostic film is referred to as
milliamperage
the cathode is the
negative terminal
an incorrect horizontal angle of the PID causes
overlapping
the beam of radiation which is responsible for exposing the X-ray film is the
primary radiation
which film sizes is known as the standard film?
size 2
what is considered radiation protection for the operator during patient exposure
stand a distance of 6 to 8 feet from primary beam
the purpose of the fixer is to
stop the action of the developer
the part of the X-ray machine that produces the radiation is
the vacuum tube
dosimeter badges should be worn at waist level when exposing x-ray receptors. True or false?
true
besides gamma rays, what additional radiation wave from the EMR spectrum is considered harmful to the tissue due to its wavelength?
ultraviolet
radiation protection for the patient would include
using the lead apron
what is the occupational dose limit for radiation exposure in a calendar quarter (13 weeks) for the whole body?
1.25 REMS
a full mouth x-ray survey on an endentulous patient consist of:
14 PA's only
a full mouth x-ray survey includes
18 films (14 PA's and 4 Bitewings)
the minimum allowable distance of the darkroom safety light from the working countertop is
4 feet
Reticulation on a film is a processing error caused by excessive:
Heat
