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Table 1 Angulations, angle differences, and percentage errors

From: Angulation error assessment for the trajectory in the anteroposterior and lateral fluoroscopic views during percutaneous endoscopic transforaminal lumbar discectomy

Variable

Value

CA (°)

10

30

CACAP (°)

0

15

30

45

0

15

30

45

Sagittal CA (°)

90.0

34.3

19.4

14.0

90.0

65.9

49.1

39.2

Coronal CA (°)

10.0

10.4

11.5

14.0

30.0

30.9

33.7

39.2

Angle difference between CA and sagittal CA (°)

80.0

24.3

9.4

4.0

60.0

35.9

19.1

9.2

Angle difference between CA and coronal CA (°)

0.0

0.4

1.5

4.0

0.0

0.9

3.7

9.2

Percentage error of sagittal CA

800%

243%

94%

40%

200%

120%

64%

31%

Percentage error of coronal CA

0%

4%

15%

40%

0%

3%

12%

31%