Accurate semiautomatic assessment of ligament length variations from MRI data.

Purpose: A semiautomatic method for the assessment of ligament length variations during different joint positions based on MRI data is proposed.

Methods: Ligament lengths are represented as distances between points marking characteristic locations in the ligament insertion regions on the bones. These points are defined manually for one single reference joint position and for all other joint positions they are automatically mapped with high accuracy to the correct locations using image registration methods.

Influence of knee flexion angle and weight bearing on the Tibial Tuberosity-Trochlear Groove (TTTG) distance for evaluation of patellofemoral alignment.

Purpose: The aim of the present study was to investigate the influence of knee flexion and weight bearing on the Tibial Tuberosity-Trochlear Groove (TTTG) distance.

Materials And Methods: Magnetic resonance imaging of the knee was carried out in 8 healthy volunteers. An open 0.