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. MAs for extremities






2. Is only 1/3 the size of the actual focal spot






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






4. The back of the cassette is made of lead to decrease....






5. AgBr + light =






6. What type of films need a lot more x-ray exposure and more time to expose them






7. The distance from the x-ray tube to the x-ray machine is the SID (source image distance) - or the FFD (also known as....)






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






9. This is inversely proportional to screen speed






10. KVp=(2x thickness of body part in cm) + 40


11. They don't move - they're found in dental units and portable units - cannot withstand the heat produced from large units






12. Lead equivalent for thyroid sheild






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






14. These cells are the most sensitive to radiation






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






16. As this increases - the intensity of the x-ray beam decreases - so the beam intensity increases - and the mAs must decrease to compensate






17. This gives you the desired mAs - and it gives less time for your patient to move






18. Types of grids






19. What is the term for an unknown cause






20. Screens are classified according to






21. If there's bone in the way of an x-ray -. those parts would be






22. For bladder cystography - we use what contrast material instead of barium






23. What needs to have high levels of x-ray to light conversion with the correct energy and color for the type of film used






24. Is the source of electrons






25. Lung tissue appears black (radiolucent) on a radiograph






26. When processing film - the black areas are made of






27. What is one of the most common areas of occurance for spinal problems ( 85% dachshunds)






28. Safe Operating Procedures






29. MAs for chest 1/2x =?






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






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






32. 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






33. When more electrons hit the focal spot on the anode






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






35. X-ray machines come with a set one - we cannot adjust it






36. Another result of the 20 degree angling






37. Growth - gonadal - neoplastic - and metabolically active cells are what kind of cells






38. 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






39. Compound of silver and bromine - chlorine - or iodine - all of which are in the halogen group of elements






40. In the dark room - the safe light (red light) needs to be at least how far away from the loading bench






41. A grid must be used on the chest if it's 11cm thick






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






43. Redness of the skin






44. Types of cell damage






45. Is to the left - electrons bounce off it at a 20 degree angle






46. White against black - like the x-ray of a plain skeleton






47. AgBr + x-rays =






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






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






50. Radiographic signs dont always agree with what