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Table 2 MRI visualization of the ACL portions, the ACL tear and the meniscus in comparison between various knee positions

From: Diagnosis of ACL and meniscal injuries: MR imaging of knee flexion versus extension compared to arthroscopy

 

30° flexion vs. extension (0°)

55° flexion vs. extension (0°)

55° flexion vs. 30° flexion

ACL

Worse n / %

Better n / %

Same n / %

Worse n / %

Better n / %

Same n / %

Worse n / %

Better n / %

Same n / %

- femoral portion

2 / 5

14 / 35

24 / 60

1 / 2

20 / 50

19 / 48

0 / 0

11 / 27

29 / 73

- midportion

4 / 10

11 / 28

25 / 62

1 / 2

22 / 55

17 / 43

1/ 2

9 / 23

30 / 75

- tibial portion

3 / 8

7 / 18

30 / 74

2 / 5

15/ 38

23 / 57

1 / 2

8 /20

31 / 78

Torn ACL portion

3/8

14/35

23/57

2/5

23/57

15/38

1/3

10/25

29/72

Meniscus

         

- medial

12 / 30

4 / 10

24 / 60

8 / 20

3 / 7

29 / 73

1 / 2

8 / 20

31 / 78

- lateral

12 / 30

3 / 8

25/ 62

6/ 15

3 / 7

31 / 78

0 / 0

8 / 20

32 / 80

  1. Abbreviations:
  2. ACL = anterior cruciate ligament.
  3. n = number.
  4. % = percentage.
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