1. Radiology Artifacts

2. Screen-Film Mammography

3. Screen-Film Mammography
Pressure mark or crimp mark due to excessive pressure on film appears as increased optical density.

4. Screen-Film Mammography

5. Screen-Film Mammography
Artifacts caused by dust and dirt on intensifying screen creating white spots simulating calcifications

6. Screen-Film Mammography

7. Screen-Film Mammography
Blurring due to motion

8. Screen-Film Mammography

9. Screen-Film Mammography
Fingerprints

10. Screen-Film Mammography

11. Screen-Film Mammography
Long streak of stain on intensifying screen appearing as minus density

12. Screen-Film Mammography
Obvious underexposure but not caused by technique or processing

13. Screen-Film Mammography
Two films loaded into same cassette

14. Screen-Film Mammography

15. Screen-Film Mammography
Wet or damp screen causing plus density

16. Screen-Film Mammography
Easy one. Why is ID superimposed on breast?

17. Screen-Film Mammography
Cassette loaded backwards (front-back) into bucky tray.

18. Screen-Film Mammography
Obvious underexposure but not caused by technique or processing

19. Screen-Film Mammography
Film loaded upside down into cassette

20. Screen-Film Mammography
Easy?

21. Screen-Film Mammography
Cassette loaded upside down into bucky tray.

22. Screen-Film Mammography

23. Screen-Film Mammography
Light leak in cassette
Incompletely latched
crack

24. Screen-Film Mammography

25. Screen-Film Mammography
Double exposure

26. Screen-Film Mammography

27. Screen-Film Mammography
Compression paddle vertical section (anterior lip)

28. Screen-Film Mammography

29. Screen-Film Mammography
Films run through processor too close together (overlapped)

30. Screen-Film Mammography

31. Screen-Film Mammography
Static electricity

32. Screen-Film Mammography

33. Screen-Film Mammography
Emulsion pick-off caused by pulling stuck films apart

34. Screen-Film Mammography

35. Screen-Film Mammography
Black arrows point at vertical black lines perpendicular to direction of film travel through processor. Cause: pressure from developer roller or moisture on entrance roller.

36. Screen-Film Mammography

37. Screen-Film Mammography
Dust in darkroom and dirty rollers causing emulsion pick-off.

38. Screen-Film Mammography

39. Screen-Film Mammography
Over-development caused by chemical fog.

40. Two images of same anatomy. What changed?
Radiography
Two images of same anatomy. What changed?

41. Radiography
No grid 102 cm SID
.33R ESE
Grid 122 cm SID
2.2 R ESE

42. CR
What are white spots?

43. Dust / dirt on phosphor screen

44. Dirt on CR plate. Right image repeated on screen-film

45. L a s e r R o t i n g M B m c d f l P T u b A / D C p h
Plate Travel

46. CR
What are white lines?

47. Cracks on image plate due to mechanical wear

48. CR

49. Transport problems in CR readerg M B m c d f l P T u b A / D C p h
Plate Travel

50. What are funny dark patterns on ventilator tube metal stabilizer?CR
What are funny dark patterns on ventilator tube metal stabilizer?

51. CR
Moire effect because of interference between scan frequency of matrix and spiral

52. CR

53. CR
Diagonal collimation caused algorithm to improperly recognize collimated area

54. CR

55. CR
Chest incorrectly specified by technologist to CR reader as lumbar spine

56. There’s flow but it isn’t showing up. Why?
Ultrasound
There’s flow but it isn’t showing up. Why?

57. Ultrasound
Improper setting of velocity scale (set too high). Low flow not displayed

58. What’s that funny reversed flow?
Ultrasound
What’s that funny reversed flow?

59. Improper setting of velocity scale (set too low). Aliasing occurs
Ultrasound
Improper setting of velocity scale (set too low). Aliasing occurs

60. Low flow in both directions?
Ultrasound
Low flow in both directions?

61. Ultrasound
Doppler angle is 90o; sample volume has vessel perpendicular to beam. Right image alters Doppler angle.

62. Same anatomy. Why is there spectral broadening on the left image?
Ultrasound
Same anatomy. Why is there spectral broadening on the left image?

63. Minimize spectral broadening artifact by using Doppler angles < 60o
Ultrasound
71o Doppler angle
81o Doppler angle
Minimize spectral broadening artifact by using Doppler angles < 60o