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15 Cards in this Set
- Front
- Back
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For which of these purposes are extraoral radiographs least suitable?
a. Detection of interproximal caries b. Locating impacted teeth c. Viewing the sinuses d. Determining the extent of a fracture
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A . Detection of interproximal Caries |
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Which of these radiographs is most frequently prescribed by the orthodontist?
a. Transcranial b. Lateral cephalometric c. Waters d. Reverse Towne |
B. Lateral Cephalometric |
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The general practitioner is most likely to use which of these extraoral radiographs?
a. Posteroanterior cephalometric b. Reverse Towne c. Panoramic d. Submentovertex |
C. Panoramic |
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Which of these radiographs would best image the maxillary sinus?
a. Transcranial b. Waters c. Periapical d. Posteroanterior Cephalometric |
B. waters |
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What size film is generally used to produce a cephalometric radiograph?
a. 5x7 in (13x18cm) b. 8x10 in (20x 25cm) c. 5x12 in (13x 30cm) d. 6x12 in (15x 30cm)
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B. 8x10 in (20x 25 cm) |
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Black artifacts on extraoral radiographs may result from each of the following EXCEPT one. which one is the exception.
a. Static electricity b. Glove powder residue c. Rapidly removing films from the packaging d. Scratched intensifying screens |
D. Scratched intensifying screens |
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Intensifying Screen will?
a. increase x-ray intensity b. increase image detail c. reduce exposure time d. decrease processing time |
C. Reduce exposure time |
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What term describes the crystals used in the emulsions of intensifying screens?
a. Phosphors b. Halides c. Sulfates d. Bromides |
A. Phosphors |
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Fast intensifying screens have blank sized crystals and blank thickness of emulsions?
a. large; decreased b. large; increased c. small; decreased d. small; increased |
B. Large; Increased |
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Rare-earth intensifying screens require less radiation to produce a quality image.
Rare-earth intensifying screens emit blue light when energized by x-radiation |
The first statement is True Second statement is false |
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Which of these is NOT a way to identify extraoral radiographs?
a. Embossed identification dot b. Commercial identification printer c. Lead letters "R" and "L" d. Lead plates affixed to the cassette |
A. Embossed identification dot |
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Unsharp (blurry) images result from which of the following?
a. Film and screens not in close contact b. Faulty (not tight) hinge on rigid cassette c. Not closing the cassette tightly d. All of the Above |
D. All of the Above |
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Which of the following is used to help reduce film fog during exposure of extraoral radiographs?
a. Voxel b. Cephalostat c. Grid d. Phosphors |
C. Grid |
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Which of the following is true regarding tomography when compared to extraoral radiographer?
a. Require less radiation to produce an image of the maxillofacial region b. Utilizes a moving x-ray source and moving image receptor c. Superimposes structures in the path of the x-ray beam of the image d. Less likely to exhibit film fog |
B. Utilized a moving x-ray source and moving image receptor |
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Cone beam computed tomography plays a valuable role in which of the following?
a. Assessing growth and development of the orthodontic patient b imaging the height and contour of edentulous ridges c. Treatment planning for dental implants d. All of the above |
D. All of the above |
