Study Guide Week 1

Question 1

True or False: All electromagnetic energy is one and the same.

Answer 1

True

Question 2

True or False: The federal government has set up safety specifications that all manufacturers of dental x-rays must meet.

Answer 2

True

Question 3

True or False: Damage to biological tissues from x-rays cannot heal or be repaired.

Answer 3

False

Question 4

True or False: The anode side of the x-ray tube, is responsible for directing the flow of the x-rays, is negative charge.

Answer 4

False

Question 5

True or False: The quicker the radiation goes through the tissues, the greater the quality of the radiograph.

Answer 5

True

Question 6

True or False: The higher milliamperage, the greater the amount of radiation.

Answer 6

True

Question 7

True or False: The effects of exposure to radiation increases every time an individual is exposed.

Answer 7

True

Question 8

True or False: A positive electron is removed from the atom when exposed to radiation.

Answer 8

False

Question 9

True or False: The effects of radiation increase every time an individual is exposed.

Answer 9

True

Question 10

True or False: Dental offices should use a thyroid shield extension on the lead apron to further protect patients under the ALARA concept.

Answer 10

True

Question 11

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

Answer 11

d. short

Question 12

True or False: Electromagnetic energy travels in waves that move in a way straight line at the speed of light.

Answer 12

True

Question 13

True or False: Genetic effects may not involve the primary individual exposed to radiation.

Answer 13

True

Question 14

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

Answer 14

a. primary

Question 15

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

Answer 15

b. scatter

Question 16

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

Answer 16

a. lead apron

Question 17

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

Answer 17

a. PID

Question 18

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

Answer 18

a. Roentgen equivalent (in)man

Question 19

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

Answer 19

a. RBE (radiation biological effects)

Question 20

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

Answer 20

a. radiopaque

Question 20

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

Answer 20

c. state and federal regulations, licensure, and risk management

Question 21

The amount of radiation that ionizes one cubic centimeter of air is an:

a. RAD
b. R
c. RBE
d. REM

Answer 21

b. R

Question 22

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

Answer 22

a. National council on radiation protection and measurement

Question 23

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

Answer 23

b. consumer-patient radiation health and safety act

Question 24

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

Answer 24

c. manufacturer

Question 25

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

Answer 25

a. 1 GY

Question 26

What is the term that describes the distance between the peaks of adjacent waves? a. nano matter b. frequency c. wavelength d. photon

Answer 26

c. wavelength

Question 27

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

Answer 27

a. useful beam AND b. primary beam

Question 28

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

Answer 28

d. extension arm

Question 29

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

Answer 29

d. secondary radiation

Question 29

What determines the quality or penetration power of the x-ray beam? a. x-radiation b. MA's c. kVp d. exposure button

Answer 29

c. kVp

Question 30

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

Answer 30

b. somatic effects

Question 31

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

Answer 31

c. RAD

Question 31

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

Answer 31

c. contrast

Question 32

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

Answer 32

b. digital control panel

Question 33

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

Answer 33

b. x-ray tube head

Question 34

These wavelengths have low energy, low frequency, and low penetrating power. a. short wavelengths b. long wavelengths

Answer 34

b. long wavelengths

Question 35

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

Answer 35

d. restricts beam 2.75 inches

Question 35

This part of the tube head removes the longer non-penetrating wavelengths. a. lead collimator b. aluminum filter c. port d. copper stem

Answer 35

b. aluminum filter

Question 36

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

Answer 36

b. MA's

Question 37

Darkness on a radiograph or image is called: a. radiopaque b. density

Answer 37

b. density

Question 38

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

Answer 38

c. 60/30

Question 39

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

Answer 39

c. film artifacts

Question 40

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

Answer 40

b. 1GY