This is a device used to reduce the amount of scatter radiation that reaches an extraoral
film during exposure.
-:- grid
Identify the error that causes teeth to appear foreshortened on a radiograph.
-:- excessive vertical angle
Identify the benefit of using a long-cone (16 inch) position-in...
Dental Assisting Radiology MN Licensure
Questions and Answers | Latest Update
This is a device used to reduce the amount of scatter radiation that reaches an extraoral
film during exposure.
✓ -:- grid
Identify the error that causes teeth to appear foreshortened on a radiograph.
✓ -:- excessive vertical angle
Identify the benefit of using a long-cone (16 inch) position-indicating device, versus a short-
cone (8inch) position indicating device.
✓ -:- less magnification
What is the angulation of the central ray when using the bisection angle technique?
What is the purpose of the lead foil in the film packets?
✓ -:- to stop the backscatter radiation
The step-down transformer is controlled by the?
✓ -:- mA dial (milliamperage)
Where are x-rays produced?
✓ -:- positive anode
X-rays are made up of:
✓ -:- photons
Which film speed is currently the fastest intraoral film available?
✓ -:- F speed film
Which of the following appear most radiopaque on a radiograph?
a. enamel
b. silver points
3|P a g e | G r a d e A + | 2 0 2 0 2 5
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