Fusaglia, Matteo; Hess, Hanspeter; Schwalbe, Marius; Peterhans, Matthias; Tinguely, Pascale Marie-Pia; Weber, Stefan; Lu, Huanxiang (2015). A clinically applicable laser-based image-guided system for laparoscopic liver procedures. International Journal of Computer Assisted Radiology and Surgery, 11(8), pp. 1499-1513. Springer 10.1007/s11548-015-1309-8
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A clinically applicable laser-based image-guided system for laparoscopic liver procedures.pdf - Published Version Available under License Publisher holds Copyright. Download (3MB) | Preview |
PURPOSE
Laser range scanners (LRS) allow performing a surface scan without physical contact with the organ, yielding higher registration accuracy for image-guided surgery (IGS) systems. However, the use of LRS-based registration in laparoscopic liver surgery is still limited because current solutions are composed of expensive and bulky equipment which can hardly be integrated in a surgical scenario.
METHODS
In this work, we present a novel LRS-based IGS system for laparoscopic liver procedures. A triangulation process is formulated to compute the 3D coordinates of laser points by using the existing IGS system tracking devices. This allows the use of a compact and cost-effective LRS and therefore facilitates the integration into the laparoscopic setup. The 3D laser points are then reconstructed into a surface to register to the preoperative liver model using a multi-level registration process.
RESULTS
Experimental results show that the proposed system provides submillimeter scanning precision and accuracy comparable to those reported in the literature. Further quantitative analysis shows that the proposed system is able to achieve a patient-to-image registration accuracy, described as target registration error, of [Formula: see text].
CONCLUSIONS
We believe that the presented approach will lead to a faster integration of LRS-based registration techniques in the surgical environment. Further studies will focus on optimizing scanning time and on the respiratory motion compensation.
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