# Brain shift compensation in image-guided neurosurgery based on 3-D ultrasound

1 VisAGeS - Vision, Action et Gestion d'informations en Santé
INSERM - Institut National de la Santé et de la Recherche Médicale : U746, Inria Rennes – Bretagne Atlantique , IRISA-D5 - SIGNAUX ET IMAGES NUMÉRIQUES, ROBOTIQUE
Abstract : This thesis deals with the compensation of brain deformations which occur during neurosurgical procedures. Neuroavigation systems have become a very attractive tool in surgical planning and procedure. However, the accuracy and usefulness of such systems are limited in presence of soft-tissue deformations. In neurosurgery, this phenomenon is called brain shift''. At present, the compensation of the brain shift'' is one of the most important challenge in image-guided neurosurgery. The contribution of this thesis deals with non rigid registration between intraoperative ultrasound images and preoperative magnetic resonance images (MRI). In order to achieve this multimodal non rigid registration, several processes are described in this manuscript. First, a new method for 3D reconstruction of freehand ultrasounds is presented. Based on the incorporation of the probe trajectory during the interpolation step, this approach allows to improve the reconstruction quality. Then, a study on the non local means denoising filter is proposed. This contribution is twofold: the improvement of the denoising quality with a reduction of the computational time, and the adaptation of this filter to the speckle. Finally, a new framework for multimodal registration of ultrasound images and MRI is presented. Based on the probability for a voxel to be include in a hyperechogenic structure, this framework allows to achieve a robust and accurate registration. All these processes are integrated into an automatic workflow to compensate for brain shift. First results obtained on four real data sets are presented,
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Theses
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https://tel.archives-ouvertes.fr/tel-00328179
Contributor : Pierrick Coupé <>
Submitted on : Thursday, October 9, 2008 - 9:29:38 PM
Last modification on : Monday, March 4, 2019 - 2:07:57 PM
Long-term archiving on : Monday, June 7, 2010 - 5:59:45 PM

### Identifiers

• HAL Id : tel-00328179, version 1

### Citation

Pierrick Coupé. Brain shift compensation in image-guided neurosurgery based on 3-D ultrasound. Signal and Image processing. Université Rennes 1, 2008. English. ⟨tel-00328179⟩

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