METHOD FOR DETERMINING FRONTAL INCLINATION OF COTYLOID CAVITY Russian patent published in 2001 - IPC

FIELD: medicine. SUBSTANCE: method involves drawing straight line through the points of upper and lower ellipse boundaries on the anteroposterior X-ray picture to determine ellipse axis length that is formed by the cotyloid cavity boundary. Perpendicular line is drawn through the center of the straight line and distance is determined form the perpendicular line base to the posterior edge of the cotyloid cavity cup outline. Cotyloid cavity rotation angle is calculated ahead of it using the formula θ = sin^-12d/D, where θ is the cotyloid cavity frontal inclination angle, d is the one half of lesser ellipse diameter and D is the greater ellipse diameter length. EFFECT: enhanced accuracy of evaluation. 2 dwg