TCDHA Rad Theory FINAL EXAM 2023 Questions and Answers Latest.

TCDHA Rad Theory FINAL EXAM 2023 Questions and Answers Latest. First invented Xrays - Wilhelm Conrad Roetgen 1895 Classifications of ionizing radiation - electromagnetic, particulate electromagnetic radiation - man made or occurs naturally, possesses no mass Particulate radiation - tiny particles of matter that possess mass and travel in straight lines and at high speeds Tube head is immersed in - oil, to provide electrical insulation and dispense of heat Cathode - negative charge terminal made of tungsten anode - postive charge terminal made of copper Cones - 8 or 16 inches Collimator - Lead disk to restrict the size of the beam High mA produces - lighter image Low kVp produces - High contrast transformers - A device that increases or decreases the voltage of an electrical current Compton scattering - 62 percent Roentgen does not have a _____________ - SI equivalent Paralelling technique advantages - accurate, simple, standardized paralelling technique disadvantages - film placement, discomfort increased target receptor distance - avoids magnification central ray is _____degrees to receptor - 90 if the lack of parallelism is _______ the image is acceptable - less than 20 central ray is _______degrees to tooth surface - +10 Radiolucent - appears dark radiopaque - appears light airspace - black space between teeth Xray film layers - film base, adhesive layer, film emulsion, protective layer what is the thickest layer of xray film? - base components of film emulsion - gelatin and silver halide crystals latent image - remains invisible until the film is processed extraoral films - panoramic and cephalometric types of dental x-ray film - Intraoral Extraoral Duplicating uses of horizontal bitewings - interproximal caries and bone loss _______ silver hilade crystals create faster film speed - large F speed film requires _____ radiation exposure - less film speed is determined by - size of silver halide crystals thickness of the emulsion radiosensitive dyes purple films contain _____ film, blue have ____ - one, two the label side of a film packet - has a flap two types of extra oral film - screen and nonscreen.