Across
- 3. The zone in which structures are clearly demonstrated on a panoramic image is termed?
- 5. The collimator is a lead plate with a small, round or rectangular opening.
- 8. Recommendations by the international commission on radiological protection recommend the following occupational exposure dose limits.
- 9. Used for extraoral imaging, sensitive to light.
- 12. The area of the oral cavity that is most likely to elicit the gag reflex when stimulated is the anterior third of the tongue.
- 14. Used to hold the screen film in tight contact with the intensifying screen and to protect the film from exposure to light.
- 15. A____equals the amout of radiation that will ionize one cubeic centimeter of air.
- 16. ___radiation forms when the primary x-ray strikes or contacts any type of matter(solid, liquid, or gas.)
- 17. ___is the process by which atoms change into negatively or positively charged ions during radiation.
- 18. The ___ is an abbreviation for the radiation dose to which body tissues are exposed, which is measured in terms of its estimated biological effects.
- 19. Used to view large areas of the jaw or skull
Down
- 1. A device used to stabilize the patient;s head in a plane parallel to the film and at right angles to the central ray of the X-ray beam:it is used for large radiographs of the head.
- 2. The orthopantomograph unit took the first acceptable___ radiography.
- 4. During the ___ process, current passes through the cathode filament and heats it to an exteremely high temperature.
- 5. Device used to convert x-ray energy into visible light,which in turn exposes screen film.
- 6. A cassett holder with two intensifying screens is used.
- 7. ___is the degree of darkness on an x-
- 10. ___ radiation deflects from its path as it strikes matter.
- 11. ___Took the first intraoral radiograph
- 13. What is not a characteristic of short, hard wavelengths.
- 20. What characteristic of a wavelength categorizes its electromagnetic energy?