Fig. 1

An extended ventrodorsal radiograph of a German Shepherd’s pelvis with a near-normal hip joint showing measurements of (A) centre edge angle (Φ) and (B) acetabular slope angle (α). a, iliac axis; b, a line tangential to the lateral acetabular rim, originating from the center of the corresponding femoral head; c, a line tangential to the acetabular sourcil; d, a line verticle to the long axis of the iliac shaft (a)