3D Interactive Ultrasound Image Deformation for Realistic Prostate Biopsy Simulation

Abstract

International audienceRealistic medical procedure simulators improve the learn-ing curve of the clinicians if they can reproduce real conditions and use. This paper describes the improvement of a transrectal ultrasound guided prostate biopsy simulator by adding the simulation of real-time prostate movements and deformations. A discrete bio-mechanical model is used to modify a 3D texture of an ultrasound image volume in order to quickly simulate the actual displacements and deformations. This pa-per describes this model and presents how the mesh deformation is used to induce the UltraSound volume deformation. The validation of the method is based on both a quantitative and a qualitative assessment. Experimental images acquired on a phantom are compared using mutual information metrics to the resulting generated images. This comparison shows that the proposed method offers realistic deformed 3D ultrasound images at interactive time. The method was successfully integrated to improve the transrectal ultrasound simulator

PROSBOT – Model and image controlled prostatic robot

“…Thanks to our previous work [4] for 3D prostate biopsy mapping, a large database of patient 3D US images was available making possible the development of simulation tools where a virtual biopsy session could be performed on real patient clinical data. To our knowledge, some simulators exist for prostate needle insertion but most of them are developed for prostate brachytherapy (see [37] for a more detailed literature review). Our simulator developed in the CamiTK 1 framework integrates a database of anonymous patient data and images, a haptic device which allows the trainee to move a mock-up US probe and a software kernel which computes a new US image depending on the position of the probe.…”

“…The deformation does not integrate a specific model of human tissues and organs but considers the 3D US image globally as an elastic deformable volume (see [37]). This is very similar to what Bajcsy et al [1] proposed for elastic registration of images in the early stages of this research domain.…”

Simulation of Patient-Specific Deformable Ultrasound Imaging in Real Time

“…Techniques combining 3D volumes and biomechanical modelling have been adopted to address simultaneously deformation and the use of patient-specific data. Selmi et al [7] developed a method for realistic 3D deformable US image generation in real time. A biomechanical model was combined with a 3D elastic texture in order to re-slice the patient's volume to achieve deformable US images.…”