DENT 1050 Chapter 22 Flashcards
- Which of the following describes a use of a panoramic image?
a. diagnosis of caries
b. evaluation of periodontal disease
c. evaluation of impacted molars
d. evaluation of periapical disease
c. evaluation of impacted molars
- The zone in which structures are clearly demonstrated on a panoramic image is termed:
a. the focal trough
b. the rotation center
c. the ghost image
d. the midsagittal plane
a. the focal trough
- Rare earth intensifying screens are recommended in panoramic imaging because:
a. rare earth screens emit a blue light
b. rare earth screens provide a more diagnostic image
c. rare earth screens require less x-ray exposure for the patient
d. the images convert faster in automatic processors
c. rare earth screens require less x-ray exposure for the patient
- A thyroid collar is not recommended in panoramic imaging because:
a. it blocks the x-ray beam and obscures information
b. there is a relatively low dose of radiation the the thyroid gland in panoramic imaging
c. it is impossible to sterilize the thyroid collar
d. all of the above
a. it blocks the x-ray beam and obscures information
- The imaginary line that passes from the bottom of the eye socket through the top of the ear canal is termed:
a. the midsagittal plane
b. the Frankfort plane
c. the vertebral plane
d. the orbital plane
b. the Frankfort plane
- a. Panoramic b. Intraoral imaging c. both;
The receptor and the tubehead rotate around the patient.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
This type of image is used to examine the extent of large lesions
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
The dental arches must be aligned to the focal trough
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
The tubehead contains a filament used to produce electrons and a target used to produce x-rays.
c. both
- a. Panoramic b. Intraoral imaging c. both;
The collimator is a lead plate with an opening in the shape of a narrow vertical slit.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
The collimator is a lead plate with a small, round or rectangular opening.
b. Intraoral imaging
- a. Panoramic b. Intraoral imaging c. both;
The vertical angulation of the tubehead is variable.
c. both
- a. Panoramic b. Intraoral imaging c. both;
A head positioner is used to position the patient’s head.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
A screen film is used.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
A cassette holder with two intensifying screens is used.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
The x-ray film must be loaded into a cassette in a darkroom under safelight conditions.
a. Panoramic
- a. Panoramic b. Intraoral imaging c. both;
A lead apron with a thyroid collar must be placed on the patient.
b. Intraoral imaging
18. a. Panoramic b. Intraoral imaging c. both; All jewelry (earrings and necklaces) must be removed before exposure.
c. both
- a. Panoramic b. Intraoral imaging c. both;
The midsagittal plane must be positioned perpendicular to the floor.
c. both
- a. Panoramic b. Intraoral imaging c. both;
The vertebral column must be perfectly straight.
a. Panoramic
- Discuss the equipment preparations necessary before exposure of a panoramic projection.
ans
- Discuss the patient preparations necessary before exposure of a panoramic projection.
ans
- Discuss the patient positioning steps necessary before exposure of a panoramic projection.
ans
- Give examples of Frankfort plane positioning errors, and discuss what steps can be taken to correct such errors.
ans
