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Artifact

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Artifact

  1. 1. Radiographic Film Artifacts
  2. 2. What Is An Artifact? Any optical density that is not anatomy An unwanted density on the radiograph Interferes with diagnosis
  3. 3. There Are Three Time Periods In Which Artifacts Can Occur 1 1 3+ = During exposure During processing During film handling, prior to processing, loading cassette, or storing
  4. 4. Exposure Artifacts Poor screen-film contact Improper use/positioning of a grid Double exposure Patient motion Poor patient preparation – Clothing, jewelery, glasses, belts, etc.
  5. 5. Processing Artifacts Dirty Rollers – Will leave deposits on film – Areas of increased or reduced density – Occasionally some sludge may not be washed off and dried onto the film Chemical Fog – Improper or inadequate chemistry – Leaves a uniform dull gray haze on the film – May also be seen in two different colors • Referred to as dichroic stain
  6. 6. Guide Shoe and Roller Marks Guide shoes are sprung or improperly positioned – The ridges in the guide shoe press against the film leaving an artifact Pi-lines – Dirt or stain on a roller – 3.14 inches apart Pressure marks – Irregular or dirty rollers • Small, circular patterns are produced
  7. 7. Handling And Storage Artifacts Light or Radiation Fog – White light streaks – Safelight too close or wrong wattage – Film left in x-ray room during exposure
  8. 8. Kink Marks Improper handling or storage Appears as a fingernail mark
  9. 9. Static Caused by buildup of electrons in the emulsion Three types of static artifacts – Crown – Tree – Smudge
  10. 10. Hypo Retention Yellowish stain that appears on finished radiograph Due to inadequate washing Remaining thiosulfate from fixer solution
  11. 11. FILMS STUCK TO EACH OTHER DURING PROCESSING
  12. 12. HYPORETENTION
  13. 13. PI-LINE
  14. 14. GUIDE SHOE MARK
  15. 15. STATIC
  16. 16. STATIC
  17. 17. STATIC
  18. 18. ROLLER MARKS
  19. 19. FINGER MARKS
  20. 20. CRIMPING MARK
  21. 21. CRIMPING MARK
  22. 22. PICK-OFF
  23. 23. WATER STAIN
  24. 24. WATER STAIN
  25. 25. WATER STAIN
  26. 26. MOTION
  27. 27. POOR FILM SCREN CONTACT
  28. 28. ARTIFACT????
  29. 29. H.T. (high Voltage) CABLES
  30. 30. ROTATION + FOG
  31. 31. ANTOMY OF INTEREST NOT SHOWN
  32. 32. DOUBLE EXPOSURE
  33. 33. BACKSCATTER OR CASSETTE UPSIDE-DOWN
  34. 34. BACKSCATTER
  35. 35. BACKSCATTER OR CASSETTE UPSIDE-DOWN
  36. 36. MOIRE EFFECT
  37. 37. WARPED CASSETTE-LIGHT LEAK
  38. 38. TWO FILMS IN THE CASSETTE UNDEREXPOSURE
  39. 39. POWDER
  40. 40. DEODORANT
  41. 41. HAIR BUN
  42. 42. CLOTHES RIBBING
  43. 43. TUBE
  44. 44. HAIR STREAKING
  45. 45. GRID CUT-OFF
  46. 46. JEWELLERY
  47. 47. HEARING AID
  48. 48. LIGHTER IN THE POCKET
  49. 49. SCATTER FOG
  50. 50. SANDBAG
  51. 51. UMBILICAL RING
  52. 52. AIR IN THE VENTRICLES AIRHEAD?????
  53. 53. PLASTER
  54. 54. DIRT ON THE SCREEN
  55. 55. PATHOLOGY
  56. 56. FOGGING
  57. 57. GRID CUT-OFF
  58. 58. KYPHOSIS-CHIN
  59. 59. STRAP
  60. 60. SCRATCHES
  61. 61. STATIC
  62. 62. In CT Scan Artifacts
  63. 63. Intra Uterine Device
  64. 64. Chole clips
  65. 65. Earring Artifact
  66. 66. MRI artifacts
  67. 67. Patient Movements

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