Fig. 4
Example of contours drawn in cross-sectional view in harvested (a) and unharvested (b) patellar tendons. Echo-types I are shown as green, echo-type 2 as blue, echo-type III as red, and echo-type 4 as black. Note that only the area inside the marked yellow circumference is quantified as patellar tendon, and it is in this area that all calculations regarding relative percentages of different echo-types are made