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Introduction

This small project creates a link between the statismo library and the elastix registration software.

Elastix is a powerful image registration software. It is based on the registration framework of the Insight Toolkit ITK. It extends ITK in many ways and allows for an easy interface based on parameter files. Statismo is a library for PCA-based statistical shape models.

With statismo-elastix, statistical shape model-based registration can be performed in elastix using shape models from statismo. For medical image analysis, these shape models typically represent the possible shape variations of an organ. By using statismo-elastix, the registration result is constrained by this model, so only valid organ shapes are allowed as registration results. This can make the registration much more robust.

The Statistical Shape Model

The shape model is not supplied or calculated by staismo-elastix. It needs to be created by the user. It needs to be a statismo model using a representer of the type itk::VectorImageRepresenter. This means that