RADIOLOGY STUDY TEST QUESTIONS
WITH CORRECT ANSWERS
What is the name of the time period between x-ray exposure and the appearance of
symptoms? - Answer- latent period
What is the name of the process that results in the harmful effects of x-rays? - Answer-
Ionization
What is meant by genetic affects - Answer- passed on to generations
Describe the uses of dental imaging - Answer- 1. Detect lesions, diseases & conditions
of the teeth
2. Confirm or classify suspected disease
3. Localize lesions or foreign objects
4. Provide info during dental procedures
5. Eval growth & development
6. Illustrate changes secondary to caries, periodontal disease & trauma
7. Document condition of a patient at a specific point and time
8. Aid in the development of a clinical tx plan
Describe the discovery of X-radiation - Answer- The First X-ray, 1895. ... At the end of
the 19th century, while studying the effects of passing an electrical current through
gases at low pressure, German physicist Wilhelm Röntgen accidentally discovered X-
rays—highly energetic electromagnetic radiation capable of penetrating most solid
objects
Who was the first person to make practical use of x-ray in dentistry - Answer- C.
Edmund Kells in 1896.
What happens during ionization - Answer- When electrons are removed from the orbital
shells of electrically stable atoms through collisions with x-ray photons
Properties of X-ratiation - Answer- X-ray are a form of energy that can penetrate matter.
X-rays belong to a group classified as electromagnetic radiation. Visible light, radar,
raddio, and television are waves that are also classufued as electromagnetic radiation.
The shorter the wavelength of the x-ray the great is its energy. Bc of their high energy
short wavelengths can penertrate matter more easily than longer wavelengths making
shorter wavelengths useful
, Primary components of an x-ray machines - Answer- Tubehead, Extension arm,and the
control panel
Understand what each part contributes to the production of x-ray - Answer- Position
indicator device-this is placed agaist the persons face a
extension arm- moves and turns 360 degrees
control panel- to operate several tubehead located i seprate rooms
What is usually found on the control panel - Answer- master switch, indicator light,
selector buttons, exposure button
how are x-rays produced - Answer- The current travels from the control panel to teh
tubehead through electrical wires in the extension arm
the current travels through the step down transformer to the filament of the cathode
the filament circuit uses the 3 to 5 volts to heat the tungsten filament in the cathode
portion of the x-ray tube
after exposure is clicked the elctrons in the cloud are shot across the x-ray tube to the
anode
the electrons speed fro the cathode to anode
the heat is carried away from the coper stem and is absorbed
travel through unleaded glass window
x-ray beam then travels through the collimator
during the production of x-ray how much energy is lost as heat - Answer- 99% lost at
heat
three types of radiation - Answer- primary radiation-made up of x-rays that come form
the target of teh xray tube
secondary radiation- created when the primary beam interacts with matter Ex contacts
the patient tissues
scatter radiation-occurs when an xray beam has been deflected from its path through
interaction with matter, travels to all parts of the patient's body and all areas of the
dental operaty
Identify the kilovoltage range for most dental xrays machines: - Answer- or 70 to90
range for milliamperage required - Answer- C. 7-15 mA
Radiolucent and radiopauge - Answer- radiolucent-dark radipauge-light
density - Answer- the overall blackness or darkness of a film. n image with the correct
density enables the dentist to view black areas
Describe how the milliamperage affects the quality of the x-ray beam - Answer- The
resulting image will not have the correct overall density or will be light in apperance
WITH CORRECT ANSWERS
What is the name of the time period between x-ray exposure and the appearance of
symptoms? - Answer- latent period
What is the name of the process that results in the harmful effects of x-rays? - Answer-
Ionization
What is meant by genetic affects - Answer- passed on to generations
Describe the uses of dental imaging - Answer- 1. Detect lesions, diseases & conditions
of the teeth
2. Confirm or classify suspected disease
3. Localize lesions or foreign objects
4. Provide info during dental procedures
5. Eval growth & development
6. Illustrate changes secondary to caries, periodontal disease & trauma
7. Document condition of a patient at a specific point and time
8. Aid in the development of a clinical tx plan
Describe the discovery of X-radiation - Answer- The First X-ray, 1895. ... At the end of
the 19th century, while studying the effects of passing an electrical current through
gases at low pressure, German physicist Wilhelm Röntgen accidentally discovered X-
rays—highly energetic electromagnetic radiation capable of penetrating most solid
objects
Who was the first person to make practical use of x-ray in dentistry - Answer- C.
Edmund Kells in 1896.
What happens during ionization - Answer- When electrons are removed from the orbital
shells of electrically stable atoms through collisions with x-ray photons
Properties of X-ratiation - Answer- X-ray are a form of energy that can penetrate matter.
X-rays belong to a group classified as electromagnetic radiation. Visible light, radar,
raddio, and television are waves that are also classufued as electromagnetic radiation.
The shorter the wavelength of the x-ray the great is its energy. Bc of their high energy
short wavelengths can penertrate matter more easily than longer wavelengths making
shorter wavelengths useful
, Primary components of an x-ray machines - Answer- Tubehead, Extension arm,and the
control panel
Understand what each part contributes to the production of x-ray - Answer- Position
indicator device-this is placed agaist the persons face a
extension arm- moves and turns 360 degrees
control panel- to operate several tubehead located i seprate rooms
What is usually found on the control panel - Answer- master switch, indicator light,
selector buttons, exposure button
how are x-rays produced - Answer- The current travels from the control panel to teh
tubehead through electrical wires in the extension arm
the current travels through the step down transformer to the filament of the cathode
the filament circuit uses the 3 to 5 volts to heat the tungsten filament in the cathode
portion of the x-ray tube
after exposure is clicked the elctrons in the cloud are shot across the x-ray tube to the
anode
the electrons speed fro the cathode to anode
the heat is carried away from the coper stem and is absorbed
travel through unleaded glass window
x-ray beam then travels through the collimator
during the production of x-ray how much energy is lost as heat - Answer- 99% lost at
heat
three types of radiation - Answer- primary radiation-made up of x-rays that come form
the target of teh xray tube
secondary radiation- created when the primary beam interacts with matter Ex contacts
the patient tissues
scatter radiation-occurs when an xray beam has been deflected from its path through
interaction with matter, travels to all parts of the patient's body and all areas of the
dental operaty
Identify the kilovoltage range for most dental xrays machines: - Answer- or 70 to90
range for milliamperage required - Answer- C. 7-15 mA
Radiolucent and radiopauge - Answer- radiolucent-dark radipauge-light
density - Answer- the overall blackness or darkness of a film. n image with the correct
density enables the dentist to view black areas
Describe how the milliamperage affects the quality of the x-ray beam - Answer- The
resulting image will not have the correct overall density or will be light in apperance
