Radiology Flashcards
Paralleling technique requires the film be placed
A. Away from the tooth, toward the middle of the oral cavity
B. Against the occupation surface of the tooth
C. Against the lingual surface of the tooth
D. Toward the tooth, away from the oral cavity
A. Away from the tooth, toward the middle of the oral cavity
How frequently should processing solutions be replenished? A. Daily B. Weekly C. As needed D. Monthly
A. Daily
Maximum wattage for a safelight should be A. 60 B. 7 C.30 D. 15
D. 15
Dental Healthcare personnel can best shield themselves from radiation during patient exposure by standing behind A. The patient's chair B. A glass window C. The tubehead D. A drywall barrier
D. A drywall barrier
The endentulous radiographic series may include all of the following except A. Periapicals B. Panoramic C. Bitewings D. Occlusals
C. Bitewings
Which of the following may cause unnecessary radiation exposure to the patient?
A. Standard radiographs during exam appointment
B. Endodontic radiographs
C. Standard radiographs during recall appointment
D. Radiograph technique errors
D. Radiography technique errors
On a full mouth series with with 18 films, how many anterior films are exposed? A. 7 B. 5 C. 8 D. 6
D. 6
Which of the following could cause a straight black line/border to appear on a radiograph?
A. Developer solution was set at a low temperature
B. Developer solution level was low
C. Fixer solution was set at a high temperature
D. Fixer solution level was low
D. Fixer solution level was low
To maintain quality assurance while procession films, dental assistants should record
A. The date solutions were changed
B. Patient exposures in a daily log
C. Names of the dental assistants using the developing room
D. The date processing solutions were purchased
A. The date solutions are changed
To view an abscess on tooth #25, the best radiographic exposure is a A. Bitewing B. Periapical C. Panoramic D. Occlusal
Periapical
Processing tanks should be cleaned when the…
Solutions are changed
Which of the following affects the quantity of x-rays being emmited from the tube head?
mA
Which of the following is a measurement of tissue damage from x-ray energy?
Radiation absorbed dose
ALARA is primarily concerned with the radiation that is
Artificial
Which of the following should be used to prevent cross-contamimation from exposure buttons?
Plastic cover
The most commonly used radiographic exposure for a 3 year old patient is?
Bitewing
The best way to correct conecutting error is to adjust
Film postion
Blurred radiographic images are often caused by
Patient movement during exposure
The time between patient exposure to radiation and the appearance of biological damage is th
Latent period
When using a 16 inch PID compared to an 8 inch PID the exposure time must
Be increased
Which of the following landmarks is useful when mounting films of the mandibular posterior area?
Mental foramen
Long term effects of exposure to radiation may be associated with
Birth abnormalities
When changing the 8 inch PID to a 16 inch PID, which of the following is used to determine the intensity of the beam?
Inverse square law
The optimum developing solution temperature for manual processing is
68 degrees
Which of the following would cause elongation on a radiograph?
Insufficient vertical angulation
Which of the following helps to decrease exposure of the thyroid gland from the primary radiation beam?
Paralleling technique
Using the ALARA concept as a guideline for radiographs includes all of the following except
Using a circular PID
Which of the following best describes the action of the developer solution?
Converts exposed silver halide crystals
In dental radiology, the purpose of the fixer solution is to
Remove unexposed silver halide crystals
The most common reason for taking biyewing radiographs is to evaluate
Interproximal caries
The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs is to protect the patient from
Scatter radiation
Most bilateral findings in radiographs are considered
Normal anatomic landmarks
The primary purpose of the bitewing radiograph is to evaluate
Interproximal decay
The best way to prevent cross contamination form an exposed film packet is by
Using individual barrier envelopes
Storing unexposed radiographs film in high humidity conditions may cause
Film fog
Radiation injury can be measured by
Dose rate
What size film is most effective, when placed vertically in the anterior region, to evaluate caries and periodontal health?
2
What is the primary advantage in using digital radiography?
Reduces the radiation to patient
On a radiograph, the anterior alveolar crest normally appears
Pointed and sharp
Film should be stored in
It’s original lead wrapped packaging
Which of the following is most likely to cause a stored radiograph to turn brown over time?
Underwashing
Which of the following affects the speed of the electrons emitted from the tubehead?
kVp
Radiation Injury results from
Exposure
Dental Healthcare personnel who are pregnant can expose radiographs during the
Entire pregnancy
Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area?
Lingual foramen
According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam’s intensity is
1/4 ad intense
Patients should wear a thyroid collar during which type of radiographic exposure?
Intraoral radiograph
Personnel radiation monitoring devices are worn to
Record the occupational exposure received by the operator
The most common radiographic exposure used to detect periodontal disease is a
Periapical
Emulsion damage to a film is caused by
Improper handling of the film
Which of the following influences the sharpness of a radiograph?
Focal spot size
Duplication film is coated with
One sided emulsion
The best way a dental assistant can minimize cross contamination when exposing radiographs is to
Touch as few surfaces as possible
Which of the following is a disadvantage of panoramic radiograph?
High cost of equipment
Which of the following increases the dentisty on duplicated film?
Decrease the exposure time
Which of the following regulates the manufacturing and installation of x-ray equipment?
Federal government
Which on the following causes the interproximal areas of the teeth to appear overlapped?
Improper horizontal angulation
The penetrating x-ray beam produced during dental radiography is called
Primary radiation
On a radiograph, when the contact area of one tooth is superimposed over the contact of another, is called
Overlapping
The diameter of the cone shaped beam produced from a circular collimator is
2.75 inches
Developing solutions temperatures should be checked frequently when using
Manual processing
Which of the following landmarks would be seen in a maximally anterior periapical radiograph?
Incisive foramen
If there are no teeth to serve as guides, which of the following landmarks indicates a maximally molar area radiograph?
Tuberosity
Human tissue are mainly composed of
Water
The most important step the dentist can take in protecting patients from x-radiation is to
Properly prescribe radiographs
Which of the following radiation effects increase in severity as more radiation is absorbed by somatic cells?
Nonstochastic
Foreshortening of the mwacillatu radiographic image results from
Increased vertical angulation
Radiographs appear dark after processing when the developing solution is
Too warm
Insufficient rinsing of processed radiographic film will result in a
Brownish yellow stain in the radiograph
The most common radiographic exposure used to evaluate a dental implant on an adult is
Periapical
Which of the following tissues is the most highly radiosensitve
Skin
The use of a thyroid is recommended for all of the following radiographic exposure except
Panoramic
