TCDHA Rad Theory Final Exam Questions and Answers

TCDHA Rad Theory Final Exam Questions and Answers First invented Xrays - Answer-Wilhelm Conrad Roetgen 1895 Classifications of ionizing radiation - Answer-electromagnetic, particulate electromagnetic radiation - Answer-man made or occurs naturally, possesses no mass Particulate radiation - Answer-tiny particles of matter that possess mass and travel in straight lines and at high speeds Tube head is immersed in - Answer-oil, to provide electrical insulation and dispense of heat Cathode - Answer-negative charge terminal made of tungsten anode - Answer-postive charge terminal made of copper Cones - Answer-8 or 16 inches Collimator - Answer-Lead disk to restrict the size of the beam High mA produces - Answer-lighter image Low kVp produces - Answer-High contrast transformers - Answer-A device that increases or decreases the voltage of an electrical current Compton scattering - Answer-62 percent Roentgen does not have a _____________ - Answer-SI equivalent Paralelling technique advantages - Answer-accurate, simple, standardized paralelling technique disadvantages - Answer-film placement, discomfort increased target receptor distance - Answer-avoids magnification central ray is _____degrees to receptor - Answer-90 if the lack of parallelism is _______ the image is acceptable - Answer-less than 20 central ray is _______degrees to tooth surface - Answer-+10 Radiolucent - Answer-appears dark radiopaque - Answer-appears light airspace - Answer-black space between teeth Xray film layers - Answer-film base, adhesive layer, film emulsion, protective layer what is the thickest layer of xray film? - Answer-base components of film emulsion - Answer-gelatin and silver halide crystals latent image - Answer-remains invisible until the film is processed extraoral films - Answer-panoramic and cephalometric types of dental x-ray film - Answer-Intraoral Extraoral Duplicating