Positioning of the Lumbar Spine, SI joints, Sacrum/Coccyx

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77 Terms

1
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What is the technique for the AP lumbar spine?

75 kVp @ 30 mAs

2
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What is the technique for the oblique lumbar spine?

80 kVp @ 40 mAs

3
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What os the IR size/orientation for the AP lumbar spine?

14 × 17 LW

4
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What os the IR size/orientation for the oblique lumbar spine?

14 × 17 LW

5
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What is the SID for the AP lumbar spine?

40 inch

6
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What is the SID for the oblique lumbar spine?

40 inch

7
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What is the collimation for the AP lumbar spine?

Collimate down to 10 × 17

8
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What is the collimation for the oblique lumbar spine?

Collimate down to 10 × 17

9
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Where is the CR for the AP lumbar spine?

At the crest

10
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Where is the CR for the oblique lumbar spine?

At the crest

11
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How would you position for a AP lumbar spine?

Ensure knees are bent

12
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How would you position for an oblique lumbar spine?

  • 45 degree rotation

  • knee slightly bent

  • ensure both shoulder and hips are in the same plane

13
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Where is the marker for the oblique lumbar spines?

Can use right or left on correct side

14
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Where is the marker for the AP lumbar spine?

5 inches from center

15
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What is the breathing for the AP lumbar spine?

Expiration

16
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What is the breathing for the oblique lumbar spines?

Expiration

17
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What is the technique for the left lateral lumbar spine?

85-90 kVp @ 50 mAs

18
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What is the technique for the L5/S1 lateral spot?

85-90 kVp @ 50 mAs

19
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What is the IR size/orientation for the left lateral lumbar spine?

14 × 17 LW

20
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What is the IR size/orientation for the L5/S1 lateral spot?

10 × 12 LW

21
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What is the SID for the left lateral lumbar spine?

40 inch

22
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What is the SID for the L5/S1 lateral spot?

40 inch

23
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What is the collimation for the left lateral lumbar spine?

Collimate tightly side to side

24
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What is the collimation for the L5/S1 lateral spot?

Slightly collimation, don’t clip marker

25
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Where is the CR for the left lateral lumbar spine?

At crest, 1-2 inches back from MSP

26
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Where is the CR for the L5/S1 lateral spot?

2 inches down from crest, 2 inches back from ASIS

27
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How would you position for a left lateral lumbar spine?

  • ensure patient is in true lateral

  • knees and elbows bent

28
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How would you position for the L5/S1 lateral spot?

  • ensure patient is in true lateral

  • knees and elbows bent

29
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Where is the marker for the left lateral lumbar spine?

Left marker on anterior side

30
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Where is the marker for the L5/S1 lateral spot?

Left marker on anterior side

31
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What is the breathing for the left lateral lumbar spine?

Expiration

32
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What is the breathing for the L5/S1 lateral spot?

Expiration

33
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What should you be sure to have for the left lateral lumbar spine?

Use both a lead blocker and sponge

34
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What is the Ferguson method also called?

AP axial L5/S1

35
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What is the technique for the Ferguson?

75 kVp @ 30 mAs

36
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What is the IR size/ orientation for the Ferguson?

10 ×12 LW

37
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What is the SID for the Ferguson?

40 inch

38
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Where is the CR for the Ferguson?

At the level of the ASIS

39
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What is the tube angle for the Ferguson?

30-35 degree cephalic angle

40
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How would you position for the Ferguson?

Ensure no rotation of the thorax or pelvis exists

41
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What is the breathing for the Ferguson?

Expiration

42
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What is the technique for the AP axial SI joints?

70-75 kVp @ 24-32 mAs

43
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What is the technique for the oblique SI joints?

70-75 kVp @ 24-32 mAs

44
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What is the IR size/orientation for the AP axial SI joints?

10 × 12 LW

45
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What is the IR size/orientation for the oblique SI joints?

10 × 12 LW

46
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What is the SID for the AP axial SI joint?

40 inch

47
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What is the SID for the oblique SI joints?

40 inch (set at 33” then put angle on)

48
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What is the collimation for the SI joints?

Collimate on 4 sides to anatomy of interest

49
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What is the tube angle for the AP axial SI joint?

30-35 degree cephalic angle

50
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Where is the CR for the AP axial SI joint?

2 inches below the level of ASIS

51
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Where is the CR for the oblique SI joints?

1 inch medial to upside ASIS

52
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How would you position for an AP axial SI joint?

  • assign MSP to CR and midline of table

  • ensure no rotation of pelvis exists

  • lets extended with support under knees for comfort

53
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How would you position for the oblique SI joints?

  • rotate body into 25-30 degree posterior oblique

  • position patient supine with arms at side and head on pillow

  • ensure you include entire SI joint

54
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What marker would you use for the RPO SI joint?

Left marker (mark upside: side being demonstrated)

55
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What marker would you use for the LPO SI joint?

Right marker (mark upside: side being demonstrated)

56
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What is the breathing for the SI joints?

Suspend respiration

57
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What is should you use for the oblique SI joints?

A sponge but make sure its 25-30 degrees

58
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What is the technique for the AP axial sacrum?

75 kVp @ 30 mAs

59
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What is the technique for the AP axial coccyx?

75 kVp @ 30 mAs

60
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What is the technique for the left lateral sacrum/coccyx?

85 kVp @ 50 mAs

61
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What is the IR size/orientation for the AP axial sacrum?

10 × 12 LW

62
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What is the IR size/orientation for the AP axial coccyx?

10 × 12 LW

63
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What is the IR size/orientation for the left lateral sacrum/coccyx?

10 × 12 LW

64
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What is the SID for all sacrum/coccyx views?

40 inch

65
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What is the collimation for the AP axial sacrum?

Collimate on all 4 sides to anatomy of interest

66
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What is the collimation for the AP axial coccyx?

7 × 7

67
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What is the collimation for the left lateral sacrum/coccyx?

Collimate on all 4 sides to anatomy of interest

68
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What is the tube angle for the AP axial sacrum?

15 degrees cephalic

69
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What is the tube angle for the AP axial coccyx?

10 degrees caudal

70
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Where is the CR for the AP axial sacrum?

2 inches below the ASIS

71
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Where is the CR for the AP axial coccyx?

2 inches below ASIS

72
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Where is the CR for the left lateral sacrum/coccyx?

3-4 inches posterior to ASIS

73
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How would you position for the AP axial sacrum?

  • patient supine with arms at side

  • head on pillow

  • legs extended with support under the knees for comfort

74
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How would you position for the AP axial coccyx?

  • align MSP to midlines of table

  • ensure no rotation of the pelvis exists

75
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How would you position for the left lateral sacrum/coccyx?

  • place patient in true lateral position

  • ensure no rotation of the thorax or pelvis exists

76
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What marker should you use for the left lateral sacrum/coccyx?

Left marker (anterior)

77
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What is the breathing for the sacrum/coccyx?

Suspend respiration