Hyperplasia-to-graft (H/G) ratio analysis example.

<p>The dashed line in the cartoon of the vein and graft on the left indicates the approximate region at the vein-graft anastomosis where the histological section, shown on the right, was collected. A line was drawn across the mouth of the graft on a digitized image of the histological section then the areas of the graft and the hyperplasia growing into the lumen of the graft were measured using NIH Image J and are shown on the histology image. The table shows the sum of the areas of the hyperplasia and the graft and then the H/G ratio results for that histological section.