Corrigendum to “In Vivo Quantitative Ultrasound Image Analysis of Femoral Subchondral Bone in Knee Osteoarthritis”

Figure 2

(a) Relationship between normalized mean intensity values of femoral bone level 2 and Kellgren-Lawrence (K-L) grading or femoral arthroscopic score 1 (FAS1) (b). Relationship between femoral subchondral bone intensity slope and K-L grading (c) or FAS1 (d). The slope was calculated from the first 2 levels. Please note that the trendline in each plot is only for illustration purposes.

(a)

(b)

(c)

(d)