WorksheetsRAD Chapter 26
Total questions: 10
Worksheet time: 5mins
An extraoral image receptor is placed __________ the mouth during x-ray exposure. Extraoral imaging is used to image _________ areas of the skull or jaws.
outside; small
outside; large
Which of the following would you evaluate using an extraoral lateral cephalometric image?
Recurrent decay
Growth and development
An occlusal receptor (size ____) may be used for some extraoral images.
2
4
An occlusal receptor ________ be used for some extraoral images. When used extraorally, it covers a ________ area than a screen film.
may; smaller
may not; smaller
The front side of the cassette is typically constructed of ________ and permits the passage of the x-ray beam, whereas the back side is made of _________ to reduce scatter radiation.
plastic; plastic
plastic; metal
Which of the following is the fastest recommended screen and screen film combination?
Rare earth screen with blue light
Rare earth screen with green light
For the transcranial projection, the central ray is directed toward a point _____ inches above and 0.5 inches behind the opening of the ear canal.
1.0
2.0
Scatter radiation
increases film fog.
increases image contrast.
(1) A grid can be used to decrease scatter radiation, decrease film fog, and increase contrast on film and PSP receptors. (2) A grid should only be used when it is necessary to improve image quality and increase contrast because it requires increased x-ray exposure.
Both statements are true.
Both statements are false.
A grid is composed of a series of
copper wires around an armature.
thin lead strips.
