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Dental Radiation-Physics, Biology & Characteristics

Cindi Due, RDH

Dental Assisting Radiology-Iannucci Ch 2,3,4

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1.Contains the master switch, indicator light selector buttons and exposure button. (2 words)
6.Functions in positioning the tubehead. Tubehead is attached to a yoke that turns 360 degrees horizontally and moves vertically. (2 words)
9.Made up of photons that travel through space at the speed of light in a straight line with a wavelike motion. Examples include cosmic rays, gamma rays, radar waves, x-rays, visible light, microwaves, and radio waves.
10.This form of radiation is produced from any substance (matter) being struck by primary radiation.
11.The number of x-rays produced in the x-ray unit and is controlled by milliamperage (mA).
15.This type of radiation refers to the penetrating x-ray beam that is produced at the target of the anode that exits the tubehead. (2 words)
16.A form of secondary radiation and is the result of an x-ray that has been deflected from its path when striking matter. Radiation is deflected in all directions and travels to all parts of the patient's body & all areas of treatment room. Detrimental (harmful) to patient and operator.
19.Radiation effects that occur after years, decades or generations. Associated with small amounts of radiation absorbed repeatedly over a long period. Repeated low levels of radiation exposure are linked to the induction of cancer, birth abnormalities, and genetic defects. (2 words)
23.Any exposure, no matter how small, has the potential to cause harmful biologic change in the operator and the patient.
25.As Low As Reasonably Achievable
26.Radiation that produces ionization, resulting in harmful effects. Includes two groups, Particulate radiation and electromagnetic radiation.
2.Short-term radiation effect that includes nausea, vomiting, diarrhea, hair loss, and hemorrhage. Not applicable to dentistry. (3 words)
3.Radiation of tiny particles of matter that possess mass and travel in straight lines and at high speeds. These radiations transmit kinetic energy by means of their extremely fast-moving, small masses. There are four types of particulate radiation, Electrons, Alpha particles, Protons, & Neutrons.
4.Are streams of high-speed electrons that originate in an x-ray tube.
5.This braking radiation is the primary kind of radiation produced in the dental x-ray tubehead.
7.Radiation effects passed on to future generations through genetic cells.
8.The time that elapses between exposure to ionizing radiation and the appearance of observable clinical signs. (2 words)
12.Regulates the penetrating power of the x-ray beam by controlling the speed of the electrons traveling between the cathode and the anode. (2 words)
13.The quantity of the x-rays produced. Controls the penetrating power of the x-ray beam by controlling the number of electrons produced in the x-ray tube and the number of x-rays produced. Higher milliampere settings produce a beam with more energy, increasing the intensity of the x-ray beam. One thousandth (1/1000) of an ampere, a unit of measurement used to describe intensity of electric current.
14.Amount of energy absorbed by tissue.
17.Radiation effects that are associated with large amounts of radiation absorbed in a short time. Examples are exposure to nuclear accident or atomic bomb.
18.weightless bundles of photons (energy) without an electrical charge, travel in waves with a specific frequency at the speed of light. These photons interact with the materials they penetrate and cause ionization.
20.The heart of the x-ray generating system where x-rays are produced.
21.Science of radiation as used in medicine, that deals with the use of x-rays in the diagnosis and treatment of disease.
22.The measurement of force that refers to the potential difference between two electrical charges.
24.The penetrating ability of the x-ray beam. The wavelength and energy of the x-ray beam is controlled by the kilovoltage peak (kVp).

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