Description
Test Criteria
Three anatomic landmarks (the iliac line, triradiate cartilage, and labrum) are used to measure the α and β angles. Meticulous measurement of the α angle is necessary because false-positive findings can occur in the anterior or posterior sectional planes The α angle should not be determined as the average angle, but rather as the largest angle
Graf α angle
The Graf α angle is defined as the angle formed between the acetabular roof and the vertical cortex of the ilium in the coronal plane An α angle less than 60° is abnormal and reflects a shallow acetabulum.
