Fig. 5
From: Anterior cruciate ligament microfatigue damage detected by collagen autofluorescence in situ
Changes in AF intensity and coherency as a function of cumulative fatigue loading cycles separated by ACL region from single knee specimens. Approximate CLEM probe placement marked by circles in the proximal (red), midsubstance (blue) and distal (green) regions in AR image (top row). Open circles indicate continuation of ACL tissue but hidden by surrounding structures. Changes in AF intensity as cumulative percentage (middle row) and coherency (bottom row) as a function of cumulative fatigue loading cycles represented by increasing circle size for every 25 loading cycles