Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A pelvis anterior-posterior radiograph illustrates the application of the ellipse method for measuring Liaw’s anteversion. Angle β is defined as the angle between the major axis of the ellipse and the connection of the two endpoints (points A and B) of the major and minor axes. The calculation of cup anteversion is determined by the arc sine of the tangent of β
