Utilization of the posterior iliac line for visualizing posterior column screws in obturator oblique view
Fig 5
Under α° obturator oblique view fluoroscopy, the Kirschner wire projects as the posterior ilioischial line.
This line overlaps superiorly with the outer cortex of the ilium, inferiorly with the outer margin of the ischium, and centrally aligns with the acetabular posterior wall. At this angle, the posterior ilioischial line is tangent to the posterior surface of the posterior column.