DAE 124 Final Exam Study with
Complete Solutions
A dental image that demonstrates very dark areas and very light areas is said to have -
ANSWER-High contrast
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: - ANSWER-Increase the exposure time, increase the milliamperage,
increase the kilovoltage
A film that is placed outside the mouth during x-ray exposure is termed: - ANSWER-
Extraoral
A higher kilovoltage produces x-rays with: - ANSWER-greater energy levels, shorter
wavelengths, more penetrating ability
A screen film is more sensitive to fluorescent light than to direct exposure to x-rays. T or
F? - ANSWER-True
A simple substitute for a periapical image in very young children to examine developing
anterior teeth is the occlusal image. T or F? - ANSWER-True
A standard adult full mouth series of radiographs include: - ANSWER-18-20 images
A thyroid collar is not recommended in panoramic imaging because: - ANSWER-it
blocks the x-ray beam and obscures information
A variation in the true size and shape of the object being imaged is termed: - ANSWER-
Distortion
advantages of bisecting technique - ANSWER-shorter exposure time
Advantages of digital radiography include all of the following, EXCEPT: - ANSWER-The
purchasing and set-up cost of the equipment
advantages of paralleling technique - ANSWER-accuracy, simplicity, duplication
Affects the penetration power of the beam - ANSWER-Kilovoltage
All of the following are advantages of digital imaging except
a. digital subtraction
b. ability to enhance the image
, c. size of the intraoral sensor
d. patient education - ANSWER-c. size of the intraoral sensor
Alveolar Bone - ANSWER-bone that supports and encases the roots of teeth,
radiopaque
An area of high attenuation that could stop radiation from reaching the receptor could
include which of the following:
a. metal crown
b. bridge
c. large amalgam restoration
d. all of the above - ANSWER-d. All of the above
An image that has many light and dark areas with few shades of gray is: - ANSWER-
High contrast
An incoming electron displaces a target electron from its shell - ANSWER-Characteristic
An organ that, if damaged, diminishes the quality of an individual's life is termed a: -
ANSWER-critical
Anterior Nasal Spine - ANSWER-The nasal septum terminates inferiorly in the V shaped
anterior nasal spine
Any leaks of white light into the dark room will cause: - ANSWER-film fogging
At 68 degrees, what is the optimal development time in minutes for manual film
processing: - ANSWER-5 min
Beam not perpendicular to object and receptor = ___ distortion - ANSWER-Increase
beam perpendicular to object and receptor = ____ distortion - ANSWER-decrease
Coronoid Process of the Mandible - ANSWER-May be visible as a RADIOPAQUE bony
projection from the lower distal portion of a posterior maxillary radiograph
Decrease crystal size = - ANSWER-Increase sharpness
Decrease focal spot = ------- - ANSWER-Increase sharpness
Decrease movement = ____ sharpness - ANSWER-increase
decrease object-receptor distance = ____ magnification - ANSWER-decrease
Complete Solutions
A dental image that demonstrates very dark areas and very light areas is said to have -
ANSWER-High contrast
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: - ANSWER-Increase the exposure time, increase the milliamperage,
increase the kilovoltage
A film that is placed outside the mouth during x-ray exposure is termed: - ANSWER-
Extraoral
A higher kilovoltage produces x-rays with: - ANSWER-greater energy levels, shorter
wavelengths, more penetrating ability
A screen film is more sensitive to fluorescent light than to direct exposure to x-rays. T or
F? - ANSWER-True
A simple substitute for a periapical image in very young children to examine developing
anterior teeth is the occlusal image. T or F? - ANSWER-True
A standard adult full mouth series of radiographs include: - ANSWER-18-20 images
A thyroid collar is not recommended in panoramic imaging because: - ANSWER-it
blocks the x-ray beam and obscures information
A variation in the true size and shape of the object being imaged is termed: - ANSWER-
Distortion
advantages of bisecting technique - ANSWER-shorter exposure time
Advantages of digital radiography include all of the following, EXCEPT: - ANSWER-The
purchasing and set-up cost of the equipment
advantages of paralleling technique - ANSWER-accuracy, simplicity, duplication
Affects the penetration power of the beam - ANSWER-Kilovoltage
All of the following are advantages of digital imaging except
a. digital subtraction
b. ability to enhance the image
, c. size of the intraoral sensor
d. patient education - ANSWER-c. size of the intraoral sensor
Alveolar Bone - ANSWER-bone that supports and encases the roots of teeth,
radiopaque
An area of high attenuation that could stop radiation from reaching the receptor could
include which of the following:
a. metal crown
b. bridge
c. large amalgam restoration
d. all of the above - ANSWER-d. All of the above
An image that has many light and dark areas with few shades of gray is: - ANSWER-
High contrast
An incoming electron displaces a target electron from its shell - ANSWER-Characteristic
An organ that, if damaged, diminishes the quality of an individual's life is termed a: -
ANSWER-critical
Anterior Nasal Spine - ANSWER-The nasal septum terminates inferiorly in the V shaped
anterior nasal spine
Any leaks of white light into the dark room will cause: - ANSWER-film fogging
At 68 degrees, what is the optimal development time in minutes for manual film
processing: - ANSWER-5 min
Beam not perpendicular to object and receptor = ___ distortion - ANSWER-Increase
beam perpendicular to object and receptor = ____ distortion - ANSWER-decrease
Coronoid Process of the Mandible - ANSWER-May be visible as a RADIOPAQUE bony
projection from the lower distal portion of a posterior maxillary radiograph
Decrease crystal size = - ANSWER-Increase sharpness
Decrease focal spot = ------- - ANSWER-Increase sharpness
Decrease movement = ____ sharpness - ANSWER-increase
decrease object-receptor distance = ____ magnification - ANSWER-decrease
