Laboratory Unit for Computer Assisted Surgery

Laboratory Unit for Computer Assisted Surgery ( LUCAS ) is a system that allows the planning of osteotomy on the computer. LUCAS has been developed since 1998 at the University of Regensburg, with the support of Carl Zeiss Oberkochen. The operational plan can be reproduced with a navigation system to the patient. LUCAS is built on the same platform as the Surgical Segment Navigator (SSN ), Surgical Tool Navigator ( STN), the Surgical Microscope Navigator (SMN ) and the multi-coordinate manipulator ( MKM ) from Carl Zeiss.

Workflow

A CT or MRI image data set from single two-dimensional layers is loaded on LUCAS. The image data is processed to eliminate noise, the edge enhancement and contrast enhancement. Subsequently, the individual two-dimensional CT slices are assembled into a three-dimensional model on the computer. In a lattice model, the bone segment to be changed is highlighted. The segment is moved to LUCAS until it is correct; Criteria for the correct position of a bone segment can a comparison of symmetry or the measurement of the orbital volume represent. Also a textured representation of Segmentumstellungsosteotomie is possible. The vectors for the spatial segment offset are then transmitted along with the image data set to the Surgical Segment Navigator.