Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
#1 The quality of the x-ray beam refers to the energy or penetrating power of the x-ray beam. #2 The quality of the x-ray beam is controlled by the kVp. a. Both statements are true b. Both statements are false c. Statement #1 is true and #2 is false d. Statement #1 is false and #2 is true |
A. Both statements are true
|
|
|
The shades of gray on the x-ray image is called: a. Opacity b. Density c. Contrast d. Sharpness |
C. Contrast
|
|
|
Fill in the blanks: ________ refers to the number of x-rays produced and is controlled by the _______.
a. Quality; kVp b. Quantity; kVp c. Quality; mA d. Quantity; mA |
D. Quantity; mA
|
|
|
True or False
To keep the film density constant: If the mA is increased, then the exposure time is decreased; if the mA is decreased, then the exposure time is incresed. |
True
|
|
|
What is the main function of changing the mA on the dental x-ray control panel? a. Wavelengths b. Speed of electron travel c. Penetrating ability of the x-ray beam d. Quantity of x-rays e. All of the above |
D. Quantity of x-rays
|
|
|
When density of the tissues is being considered, a very low density area (tissue) will:
a. Stop the x-ray completely, and appear white on the radiograph b. Partially block the x-ray, and appear gray c. Allow the x-rays to pass through, and appear black on the film d. None of the above |
c. Allow the x-rays to pass through, and appear black on the film |
|
|
When increasing the kVp on the control panal, which of the following is likely to occur?
a. A low contrast image b. A radiograph with high density c. A film that is better for caries detection d. All of the above e. A and B only |
E. A and B only
|
|
|
The measurement of force used to provide the penetrating ability of the x-ray is the:
a. Amperage b. Voltage c. Velocity d. Frequency |
b. Voltage
|
|
|
A higher kilovoltage produces x-rays with:
a. Greater energy levels b. Shorter wavelengths c. More penetrating ability d. All of the above |
D. All of the above
|
|
|
Magnification can be caused by which of the following factors?
a. A long PID b. A short Object-film distance c. A short Target-film distance d. All of the above |
C. A short Target-film distance
|
|
|
Which of the following are true concerning contrast?
a. A short-scale (high contrast) results from a low kVp setting b. Long-scale (low contrast) can be described as having low contrast c. Long scale contrast exhibits many densities or shades or gray d. All of the above e. B and C only |
D. All of the above |
|
|
The penumbra or fuzziness surrounding a radiograph image is used to distinguish which geometric characteristic?
a. Distortion b. Magnification c. Sharpness d. All of the above |
C. Sharpness
|
|
|
All of the following are true concerning the focal spot size EXCEPT:
a. It is found on the tungsten target of the anode b. It is set by the manufacturer (can't be changed) c. The larger the focal spot area, the sharper the image appears d. None of the above (all of the above are true) |
c. The larger the focal spot area, the sharper the image appears |
|
|
The target-to-surface distance: a. Is the same thing as the object-to-film distance b. Is determined by the length of the PID c. Determines the amount of distortion you will get d. All of the above |
B. Is determined by the length of the PID
|
|
|
True or False
The x-ray beam should be directed perpendicular to the tooth and film. |
True
|
|
|
The tooth structure that appears the most radiolucent on the radiograph is the:
a. Enamel b. Dentin c. Cementum d. Pulp |
D. Pulp
|
|
|
When radiographs are mounted labially, which of the following accurately describes the labial mount method?
a. The embossed dot is up/convex, and the viewer's orientation is facing the patient b. The embossed dot is down/concave and the viewer's orientation is facing the patient c. The embossed dot is up/convex and the viewer's orientation is from inside the patient's mouth d. The embossed dot is down/concave and the viewer's orientation is from the inside the patients mouth |
a. The embossed dot is up/convex, and the viewer's orientation is facing the patient |
|
|
A high-energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube is called?
a. Radiography b. Wavelength c. Radiograph d. X-radiation |
D. X-radiation
|
|
|
The overall blackness of an image is termed?
a. Contrast b. Density c. Overexposure d. Polychromatic |
B. Density
|
|
|
True or False
A decreased focal spot size = increased sharpness |
True
|
|
|
A radiograph that has high contrast is produced with:
a. High kilovoltage b. Low kilovoltage c. High milliamperage d. Low milliamperage |
B. Low kilovoltage
|
|
|
The overall portion of a processed radiograph that appears light or white is termed:
a. Radiolucent b. Radiopaque c. Dense d. High density |
B. Radiopaque
|
|
|
A dental patient has thick soft tissues and dense bones. To compensate for this increase in subject thickness and to provide an image of diagnostic density, the dental radiographer may:
a. Increase the exposure time b. Increase the milliamperage c. Increase the opperating kilovoltage peak d. any of the above |
D. Any of the above
|
|
|
Inverse square law: The intensity of radiation is inversely proportional to the square of the distance from the source of radiation. Which statement is true?
a. PID length is changed from 8 inches to 16 inches the result of the x-ray beam is 1/4 as intese. b. PID length is changed from 16 to 8 inches and the result of the x-ray beam is trippled. c. Both statements are true d. Both statements are false |
A. PID length is changed from 8 inches to 16 inches the result of the x-ray beam is 1/4 as intese. |
|
|
The distances to consider when exposing dental radiographs are: a. Target to surface b. Target to object c. Target receptor distance d. All of the above e. None of the above |
D. All of the above
|
|
|
The length of the PID device is changed from 16 inches to 8 inches. The resultant intensity of the beam will be:
a. 4x as intense b. 2x as intense c. 1/2 as intense d. 1/4 as intense |
A. 4x as intense
|
|
|
True or False
The raised bump on the x-ray film is used to determine right and left sides of the mouth. |
True
|
|
|
True or False
Although all members of the dental team may view films, it is the responsibility of the dental hygienist to establish a final diagnosis. |
False
|
|
|
What are the 2 methods of mounting?
a. Anterior, and posterior mount b. Posterior, and lingual mount c. Labial and lingual mount d. None of the above |
C. Labial and lingual mount
|
|
|
Anterior periapical images can be distinguished from posterior images because of: a. The identification dot b. The orientation of the x-ray film placement c. The size of the x-ray film d. The number of films used |
B. The orientation of the x-ray film placement |
