Study Guide Week 1 Flashcards
for DEN205
True or False: All electromagnetic energy is one and the same.
True
True or False: The federal government has set up safety specifications that all manufacturers of dental x-rays must meet.
True
True or False: Damage to biological tissues from x-rays cannot heal or be repaired.
False
True or False: The anode side of the x-ray tube, is responsible for directing the flow of the x-rays, is negative charge.
False
True or False: The quicker the radiation goes through the tissues, the greater the quality of the radiograph.
True
True or False: The higher milliamperage, the greater the amount of radiation.
True
True or False: The effects of exposure to radiation increases every time an individual is exposed.
True
True or False: A positive electron is removed from the atom when exposed to radiation.
False
True or False: The effects of radiation increase every time an individual is exposed.
True
True or False: Dental offices should use a thyroid shield extension on the lead apron to further protect patients under the ALARA concept.
True
Which wavelengths are most desired in dental radiographs because of their high frequency, energy, and penetrating power?
a. long
b. bright
c. scatter
d. short
d. short
True or False: Electromagnetic energy travels in waves that move in a way straight line at the speed of light.
True
True or False: Genetic effects may not involve the primary individual exposed to radiation.
True
The central beam that comes from the x-ray tube head and consists of high energy, short wavelength x-rays traveling in a straight line is:
a. primary
b. scatter
c. secondary
d. leakage
a. primary
This type of radiation is deflected from its path as it strikes matter. It presents the most serious danger for the operator.
a. primary
b. scatter
c. secondary
d. leakage
b. scatter
What piece of equipment should be placed on the patient by the dental assistant prior to x-ray exposure?
a. lead apron
b. over gloves
c. barrier
d. kVp
a. lead apron
The open ended tube that allows the operator to direct the x-rays more accurately is called:
a. PID
b. control panel
c. panoramic
d. x-ray tube
a. PID
What is the dose to which body tissues are exposed, measured in terms of its estimated biological effects in relation to an exposure dose of x or gamma radiation?
a. Roentgen equivalent (in)man
b. primary
c. RBE
d. RAD
a. Roentgen equivalent (in)man
What is the measurement unit used to compare the biological effects of different tissues irradiated by different forms of energy?
a. RBE (radiation biological effects)
b. RAMD
c. Radon
d. REM
a. RBE (radiation biological effects)
The term used in radiographic interpretation that explains the structures that are dense and do not allow x-rays to pass through is:
a. radiopaque
b. radiolucent
c. yellow
d. green
a. radiopaque
What are three legal considerations regarding the use of radiographs in dentistry?
a. local, state, federal
b. regulations, local, state
c. state and federal regulations, licensure, and risk management
d. none of the above
c. state and federal regulations, licensure, and risk management
The amount of radiation that ionizes one cubic centimeter of air is an:
a. RAD
b. R
c. RBE
d. REM
b. R
Individuals who routinely use ionizing radiation in their occupations are regulated by the dose limitations defined by:
a. National council on radiation protection and measurement
b. ALARA
c. DANB
d. QA
a. National council on radiation protection and measurement
What federal law enacted in 1981 require all persons who take dental radiographs to be properly trained and certified?
a. prescribing dentist
b. consumer-patient radiation health and safety act
c. OSHA
d. DANB
b. consumer-patient radiation health and safety act
Who has the initial task of making sure the control panel has indicators that displays mA, kV, and impulses per exposure time?
a. dental assistant
b. federal government
c. manufacturer
d. dentist
c. manufacturer
Converting the standard system of radiation measurement to the metric system, the dosage for one hundred RADS is equivalent to:
a. 1 GY
b. 1SV
c. 1 c/kg
d. 100 REMs
a. 1 GY
What is the term that describes the distance between the peaks of adjacent waves?
a. nano matter
b. frequency
c. wavelength
d. photon
c. wavelength
Multiple answer choice:
____ & ____ When a beam has been filtered and collimated is termed the what?
a. useful beam
b. primary beam
c. secondary beam
d. scatter beam
a. useful beam AND b. primary beam
This part of the x-ray unit allows the operator to freely position the tube head for the various positions that are required for dental radiograph procedures.
a. PID
b. collimator
c. control panel
d. extension arm
d. extension arm
This type of radiation is formed when the primary x-ray beam strikes the patient and these waves are often transformed into longer wavelengths and lose their energy.
a. primary radiation
b. scattered radiation
c. characteristic radiation
d. secondary radiation
d. secondary radiation
What determines the quality or penetration power of the x-ray beam?
a. x-radiation
b. MA’s
c. kVp
d. exposure button
c. kVp
These effects of radiation leaves the patient in poor health, with cancer or cataracts, but is (NOT) passed onto the next generation.
a. genetic effects
b. somatic effects
c. radioactive effects
d. radon effects
b. somatic effects
The GY is a measurement of the amount of ionizing radiation absorbed in the tissue substance, what is another term for this?
a. REM
b. MPD
c. RAD
d. FORCE
c. RAD
What is the term used to tell the difference between the shades of gray on an x-ray?
a. density
b. dose equivalent
c. contrast
d. sievert
c. contrast
By using the touch pads and or switches for patient size, the amount of kVp, for area radiographed, this type of control panels sets the time switch automatically.
a. manual control panel
b. digital control panel
b. digital control panel
This part of the x-ray tube unit directs the x-ray beam from the cathode side of the focusing cup toward the anode side in the tube head and is designed to direct the stream of electrons.
a. tungsten filament
b. x-ray tube head
c. step-down transformer
d. step-up transformer
b. x-ray tube head
These wavelengths have low energy, low frequency, and low penetrating power.
a. short wavelengths
b. long wavelengths
b. long wavelengths
What is the main purpose of the collimator for the x-ray beam and what is the size of the beam when it strikes the patient’s face?
a. enlarges beam to 3.5 inches
b. shortens beam to 1.5 inches
c. lengthens beam 2.0 inches
d. restricts beam 2.75 inches
d. restricts beam 2.75 inches
This part of the tube head removes the longer non-penetrating wavelengths.
a. lead collimator
b. aluminum filter
c. port
d. copper stem
b. aluminum filter
What type of electrical energy controls the amount or quantity of electrons used in dental x-ray machines?
a. kVp
b. MA’s
c. MHZ
d. protons
b. MA’s
Darkness on a radiograph or image is called:
a. radiopaque
b. density
b. density
The electronic timer controls the number of impulses needed to produce an x-ray machines?
a. 80/40
b. 70/30
c. 60/30
d. 50/25
c. 60/30
When the film is handled incorrectly or the area around the processing tank is not kept clean, this result could happen:
a. scratched film
b. air bubbles on the film
c. film artifacts
d. reticulation
c. film artifacts
Converting the standard system for radiation measurements to the metric system, the dosage for 100rads is equivalent to:
a. 1 c/kg
b. 1GY
c. 100rem
d. 1SV
b. 1GY
