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Across 3. The science or study of radiation as used in medicine; 5. Which functions to dissipate the heat away from the tungsten target 9. A form of x-ray beam that is most detrimental to the patient and operator 10. or plate of tungsten, which serves as a focal spot and converts bombarding electrons into x-ray photons 14. A picture on film produced by the passage of x-rays through an object or body. 18. A subatomic particle that carries a negative electrical charge? 20. A portion of the cathode in the x-ray tube; serves as a focal spot and converts bombarding electrons into x-ray photons 21. An element is the simplest atom, with an atomic number of 1.

Down 1. A form of energy carried by wave or streams of particles. 2. A beam of energy that has the power to penetrate substances and record image shadows on photoghrapic film or digital sensors 4. To avoid the primary beam, the dental radiographer must be in this position to the beam 6. According to the text, "________" is the most important uses of dental radiographs. 7. is a leaded-glass vacuum tube that prevents x-rays from escaping in all directions. 8. This type of device is not used because of increased scatter radiation. 11. A portion of the cathode in the x-ray tube; focuses the electrons into a narrow beam and directs the beam across the tube toward the tungsten target in the anode. 12. The _____ ________ activates (s) the machine to produce x-rays. 13. The quantity of the x-rays produced is controlled by this _____. 15. A device that restricts the size and shape of the x-ray beam. 16. A subatomic particle that carries a positive charge. 17. In dental radiography, the term _____ is used to describe the mean energy or penetrating ability of the x-ray beam. 19. The fundamental unit of matter