Dental Radiology Exam Practice Questions and Answers

Dental Radiology Exam Practice Questions and Answers in X-radiation, ionization occurs when? - Answer️️ -Photons penetrate matter what are found in the nucleus of an atom? - Answer️️ -Protons and Neutrons A Gray (rad)is defined as the - Answer️️ -unit of absorbed dose of radiation per gram of tissue which cell type is most sensitive to carcinogenesis following porlonged exposure to ionizing radiation? - Answer️️ -Blood What part of an atom that carries a negative charge? - Answer️️ -Electron the biologic effect of ionizing radiation is related to the? - Answer️️ -Area Exposed, Dose rate, and Total dose Which Disease is associated with long-term, low level radiation exposure? - Answer️️ -Leukemia The x-rays that are most likely to be absorbed by the skin are x-rays that are - Answer️️ -Of long wavelength The time between exposure to x-rays and appearance of radiation damage is called the? - Answer️️ -Latent Period ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 2 The quantity (numbers) of radiation emitted is primarily dependent upon the? - Answer️️ -Milliamperage Setting The location at which x-rays originate in the x-ray tubehead is called the? - Answer️️ -Tungsten target The most dangerous time for a fetus to be exposed to x-radiation is during the? - Answer️️ -First Trimester If a radiographic film would be properly darkened in 2 seconds of exposure at 10 mA, it would obtain the same darkness in 1 second of exposure at? - Answer️️ -20 mA How often do the walls of the dental operatory need to be treated in order to remove any residual radiation that has accumulated? - Answer️️ - Never Compared to 75 kVp, a film produced at 90 kVp will have? - Answer️️ - High Contrast, and a long gray scale Ionizing radiation consists of? - Answer️️ -photons that travel at the speed of light, photons that travel in a wave motion, photons without mass The Alara concept is related to the? - Answer️️ -use of minimum exposure time and mA necessary, and use of the fastest film available When the x-ray exits the position indicating device, it should be no more than how many inches in diameter? - Answer️️ -2.75 ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 3 When is it acceptable to allow the operator to hold radiographic film for a patient during exposure? - Answer️️ -It is never acceptable to hold the film during exposure What is the primary purpose of the lead foil in an intraoral film packet? - Answer️️ -prevent fogging of the film According to the National Council of Radiation Protection standards, The annual Maximum Permissible Dose (MVD) of radiation for non- occupationally exposed adult patients is? - Answer️️ -.1 rem The Collimator is composed of? - Answer️️ -Lead If the operator cannot leave the room during radiographic exposure she should? - Answer️️ -Stand 6 feet away at a 90-135 degree angle to the central beam an aluminum filter in a dental x-ray unit functions to? - Answer️️ - absorbs x-rays of long wavelengths The "control" film badge? - Answer️️ -Should be stored in a location that is away from all potential sources of ionizing radiation What represents the fastest speed of radiographic film? - Answer️️ -F With regard to dental radiography procedures, the risk/benefit rat