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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.
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