Test your basic knowledge |

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. KVp=(2x thickness of body part in cm) + 40

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2. This is caused by mutations in gonadal cells - not seen until offspring are produced - mutations are not always bad






3. Radiographic signs dont always agree with what






4. The electrical current sent through the filament to cause this electron release is called






5. If the kVp is increased by 15% - the density is doubled






6. Film that is more sensitive to ionizing radiation than to fluorescent light






7. Screen speed is.....to the exposure required to cause it to flouresce






8. Affects both density and contrast






9. Most commonly used film - compromise between graininess and speed (detail)






10. The tendency of a luminescent compound to continue to give off light after x-radiation has stopped






11. Bone infection - also known as spondylitis






12. These cells are the most sensitive to radiation






13. With the heel effect - more x-rays tend to be produced toward the cathode end






14. Is the measurement for the maximum energy available at that setting






15. What type of bone tumors started in the location they were first found






16. Is responsible for the number or quantity of x-rays






17. Increased crystal size.....






18. MAs for chest 1/2x =?






19. If the thorax is greater than or equal to....you should use a grid






20. A type of electromagnetic radiation which have a shorter wavelength than visible light






21. When this is exposed to x-rays - it will absorb photons (quanta) and give off photons of visible light which the film is sensitive to (give off blue light)






22. Old mAs x (new FFD)2 divided by (old FFD)2






23. These screens have increased definition/detail - need to have increased radiation exposure






24. Improper centering of grid is one reason for






25. Can cause damage to living cells through the process of excitation or ionization of electrons in the orbits around atoms






26. Must increase.....to compensate for x-ray absorption by the grid. (we triple our mAs)






27. Is the device which restricts (narrows) the beam of x-rays as they leave the x-ray machine






28. Faster screens/less detail; slower screens/more detail






29. Sheets of luminescent phosphor crystals bound together and mounted on a cardboard or plastic base






30. Another result of the 20 degree angling






31. Hairloss or baldness






32. We ideally take a radiograph of the abdomen at the peak of inspiration






33. There are......intensifying screens within a cassette






34. Calcium 'bridges' between adjacent vertebrae






35. Film with: high detail - minimal graininess - increased exposure






36. The efficiency of this reflects light made by phosphors back towards the film






37. If there's metal in the way of an x-ray - than no x-rays will get through and that part would be






38. To double the density






39. Has a positive charge






40. What is the term for an unknown cause






41. Does move - has disks that rotate at high speeds - this helps spread out the heat that's produced as the electrons hit the focal spot






42. What is the term for the spotty appearance on the film due to the large crystals in the screens






43. Distance from the grid to the x-ray tube (36-40 inches)






44. Increase mAs and kVp in order to...






45. What type of film has no screens or film cassettes






46. Is located in a focusing cup made of molybdenum which has a high melting point and helps to direct the electrons produced toward the cathode






47. A device that moves the grid back and forth under the table. it helps to prevent grid lines from showing






48. A lightproof encasement designed to hold x-ray film and intensifying screens in close contact






49. These crystals will turn white/clear when processing film






50. Animal has broken femur - it's ideal to have How many radiographs for diagnostic purposes