Fig. 1 | Scientific Reports

Fig. 1

From: Association between ossific nucleus volume changes and postoperative avascular necrosis risk in children with developmental dysplasia of the hip

Fig. 1

Measurement of the ossific nucleus on different levels in preoperative MRI (a) measurement of the upper and lower diameters of the ossific nucleus: two perpendicular lines are drawn with the growth plate as a reference. The distance “A” between these two lines represents the upper and lower diameter of the ossific nucleus. (b) Measurement of the anterior and posterior diameter of the ossific nucleus: Two tangent lines to the ossific nucleus are drawn parallel to each other. The maximum distance between these two lines is taken as the anterior and posterior diameter “B” of the ossific nucleus. (c) Measurement of the left and right diameter of the ossific nucleus: Two tangent lines to the ossific nucleus are drawn parallel to each other. The minimum distance between these two lines is taken as the left and right diameter “C” of the ossific nucleus.

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