Archiving and visualization of the patient's anatomical model using b-spline curve and surface representation

From the patient's perspective a minimally invasive surgery decreases trauma, the associated pain, and greatly reduces the post-operative recovery time, trauma and faster return to life. It has some disadvantages, like limited field of view and occluded anatomy, which could be overcome by registration of the preoperative patient's anatomical model to the patient's position in the operating room. The aim is archiving and presenting the patient's anatomical model in a manner which is easy to modification and integration into surgical workflow finally causes simplification in perception of operating field. B-spline curve and surface representation for anatomical models were selected. For creating the model from segmentation results, the global surface interpolation algorithm is applied. Scene graph oriented solution was proposed for 3D image data and anatomical model presentation. The whole scene graph is divided into independent branches, which accelerates rendering and simplifies data loading and building the scene graph process. Due to the lack of a "gold standard" for evaluation of the segmentation results obtained automatically, a manual way of correction is feasible. The presented approach was implemented in application for the anatomical liver model presentation using Open Inventor library.