Factors influencing the accuracy of biomechanical breast models.

摘要: Factors influencing the accuracy of biomechanical breast models Recently it has been suggested that finite element methods could be used to predict deformations in a number applications, including comparison multimodality images, validation image registration and guided interventions. Unfortunately knowledge mechanical properties tissues is limited. This study evaluated with which based on can displacements tissue within practical clinical situation where boundaries organ might known reasonably accurately but there some uncertainty tissue. For two datasets, we investigate influence elasticity values, Poisson's ratios, boundary conditions, solvers mesh resolutions. Magnetic resonance images were acquired before after compressing each volunteer's by about 20%. Surface displacement conditions derived from three-dimensional nonrigid registration. Six linear three nonlinear elastic material without skin tested. These compared hyperelastic models. The was assessing ability model location 12 corresponding anatomical landmarks. most sensitive ratio condition. Best results achieved for accurate appropriate ratios fibroglandular at four times stiffer than fatty configurations reduced mean (maximum) distance landmarks 6.6 mm (12.4 mm) 2.1 (3.4 averaged over all experiments. (C) 2006 American Association Physicists Medicine.