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Table 2 Demonstration of arterial disease by MRA MIP, MRA MIP & base data and CA by segment: kappa coefficient of agreement, using quadratic weighting, between the angiographic and MR measures of stenosis, k = 0.68 (95% confidence intervals: 0.63-0.73)

From: Impact of source data on the interpretation of contrast-enhanced magnetic resonance angiography of the lower limbs

 

MRA (MIP Only)

MRA (MIP& BD)

CA

 

≤ 50%

51-99% Stenosis

NS

NSVC

≤ 50%

51-99% Stenosis

NS

NSVC

≤ 50%

51-99% Stenosis

NS

Stenosis

Stenosis

 

Infra-renal aorta

32

0

0

0

32

0

0

0

32

0

0

Common iliac

60

2

2

0

60

1

3

0

62

2

0

Internal iliac-origin

55

4

4

1

55

5

4

0

56

4

4

External iliac

62

1

1

0

63

0

1

0

60

2

2

Common fem

61

1

2

0

61

1

2

0

61

0

3

Profunda fem

56

5

3

0

57

4

3

0

59

4

1

Superficial fem-up1/3

37

8

15

4

42

6

15

1

44

6

14

Superficial fem-mid1/3

35

8

17

4

38

9

15

2

39

7

18

Superficial fem-low1/3

41

11

12

0

41

10

13

0

37

10

17

Popliteal-AK

49

3

12

0

49

3

12

0

43

7

14

Popliteal-BK

55

2

7

0

54

3

7

0

53

2

9

Ant tib-horizontal

44

3

14

3

47

2

12

3

44

6

14

Ant tib-vert-prox 50%

36

3

21

4

38

4

19

3

31

8

25

Ant tib-vert - dist 50%

34

1

24

5

37

1

23

3

30

1

33

Common peroneal

45

5

8

6

45

6

8

5

46

6

12

Post Tib - prox 50%

36

4

21

3

40

6

16

2

34

7

23

Post Tib – dist 50%

27

2

27

8

33

3

22

6

30

1

33

Peroneal - prox 50%

49

3

8

4

50

3

7

4

47

6

11

Peroneal - dist 50%

39

0

16

9

41

0

15

8

49

0

15

  1. NS – Segment not seen. NSVC – Segment not seen because of venous contamination.
  2. CA – Conventional angiography.