Intra- and Inter-Rater Reliability of Processing Ultrasound Tissue Characterization Scans in Midportion Achilles Tendinopathy

Figure 4

Long-axis UTC image of the Achilles tendon. Eleven consecutive contours (vertical yellow lines) capture the entire tendon midportion, starting 2 cm proximal to the calcaneus (most right sided contour) and continuing up to the myotendinous junction (most left sided contour). Echo-type I is colored green, echo-type II is colored blue, echo-type III is colored red, and echo-type IV is colored black. Echo-types I + II represent aligned fibrillar structure whereas echo-types III + IV can be seen as disorganized Achilles tendon structure.