Rad Physics Exam 3 Questions and Answers 2024

Rad Physics Exam 3 Questions and Answers 2024 1. Which of the following produces the highest characteristic x-ray energy level.: K-shell interaction. 2. When projectile electrons interact with the anode, most of their kinetic energy is converted into what.: heat. 3. The protective housing tube....: Reduces leakage radiation, provides mechan- ical support for the tube, and protects against electric shock. 4. The two main parts to the cathode are:: the filament and the focusing cup. 5. Filament composition generally consists of:: A thorium and tungsten alloy 6. x-rays are produced when high-energy electrons strike the atoms of the....- : anode 7. occurs when projectile electrons bounce off the focal spot and land on other areas of the target.: off-focus and extra focal radiation 8. When mAs is increased....: x-ray quantity increases. 9. When tube filtration is increased...: x-ray quantity decreases. 10. This type of x-ray interaction with matter occurs throughout diagnostic range.: photoelectric effect. 11. occupational radiation dose is generally due to: Compton scattering 12. An ion pair consists of: a positively charged atom and a negatively charged ejected electron 13. The line focus principle refers to...: a smaller effective focal spot size than the actual focal spot size. 14. Electrons in the outermost shell from the nucleus have....: the least binding energy 15. The space charge is: the collection of projectile electrons in the vicinity of the filament before kilovoltage is applied to accelerate them across the tube. 16. The charge of the focusing cup is: negative 17. Quantity of x-ray photons produced is directly proportional to....: mA 18. Modern x-ray equipment uses a timer to control the length of the exposure: electronic 19. timers measure the quantity of radiation reaching the image receptor and terminate the exposure when enough radiation is received to provide the required optical density: Automatic Exposure control 20. What is the purpose of the spinning of the anode.: increases heat capacity of the x-ray tube 21. What element is primarily used for the anode target.: Tungsten 22. What directs the x-ray beam out the x-ray tube window.: The angle of the anode target. 23. An x-ray tube:: needs direct current to work. 24. The sharpness of an x-ray image can be increased by:: decreasing the size of the focal spot 25. The anode cooling chart formula for single phase x-ray machines is calcu- lated by multiplying the peak voltage by the current by the:: exposure time. 26. A dual focus x-ray tube has two:: filaments 27. To take advantage of the hell effect of the x-ray tubes, you might place what body area on the anode side of the tube's beam.: thinner body area 28. "Bremsstrahlung" means...: braking 29. The housing of an x-ray tube is designed to minimize...: the risk of electrical shock, heat build up, and leakage radiation. 30. Which tungsten atom electron shells produce characteristic photon ener- gy that is of value for diagnostic imaging.: K shell only.