Intra-operative Update of Boundary Conditions for Patient-Specific Surgical Simulation

• Published in: Medical Image Computing and Computer Assisted Intervention - MICCAI 2021 Vol. 12904; pp. 373 - 382
• Main Authors: Tagliabue, Eleonora, Piccinelli, Marco, Dall’Alba, Diego, Verde, Juan, Pfeiffer, Micha, Marin, Riccardo, Speidel, Stefanie, Fiorini, Paolo, Cotin, Stéphane
• Format: Book Chapter
• Language: English
• Published: Switzerland Springer International Publishing AG 2021; Springer International Publishing
• Series: Lecture Notes in Computer Science
• Subjects: Biomechanical modeling; Boundary conditions; Intra-operative model update
• ISBN: 9783030872014; 3030872017
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-030-87202-1_36

Patient-specific Biomechanical Models (PBMs) can enhance computer assisted surgical procedures with critical information. Although pre-operative data allow to parametrize such PBMs based on each patient’s properties, they are not able to fully characterize them. In particular, simulation boundary conditions cannot be determined from pre-operative modalities, but their correct definition is essential to improve the PBM predictive capability. In this work, we introduce a pipeline that provides an up-to-date estimate of boundary conditions, starting from the pre-operative model of patient anatomy and the displacement undergone by points visible from an intra-operative vision sensor. The presented pipeline is experimentally validated in realistic conditions on an ex vivo pararenal fat tissue manipulation. We demonstrate its capability to update a PBM reaching clinically acceptable performances, both in terms of accuracy and intra-operative time constraints.