Fig. 1.

The distance from the central peak to a line between the medial and lateral aspects of the distal femoral physis (red line) was divided by the width of the physis (yellow line) to obtain the standardized central peak value, as measured in a 12-year-old girl on an anteroposterior radiograph. The physeal length line is drawn from points halfway between the ends of the metaphysis and epiphysis. The central peak height is drawn from this line to the edge of the metaphyseal side of the physis.