Bony free flap reconstruction of the facial skeleton remains a challenging area of reconstructive surgery. Despite technological advances that have aided planning and execution of these procedures, surgical inaccuracy is not insignificant. One source of error that has not been wholly addressed is that attributable to a human operator.
View Article and Find Full Text PDFStud Health Technol Inform
April 2017
Future minimally invasive neck surgery requires a navigation system adapted to the actual intra-operative bedding of the patient. The detection of the bedding-caused tissue shift is essential for a safe orientation for the surgeon new endoscopic operation procedures in neck surgery. It is essential to visualize the relation between important anatomic landmarks and operation instruments at any time.
View Article and Find Full Text PDFFuture minimally invasive neck surgery requires a navigation system adapted to the actual intraoperative bedding of the patient. The detection of the bedding-caused tissue shift is essential for a safe orientation for the surgeons' new endoscopic operation procedures in neck surgery. It is essential to visualize the relation between important anatomic landmarks and operation instruments at any time.
View Article and Find Full Text PDFInt J Comput Assist Radiol Surg
July 2010
Purpose: An endoscope fisheye lens camera calibration model was extended using intuitive vector parameters to describe lens distortion with a fourth degree radial polynomial.
Method: An existing algorithm was expanded to the wider domain of applicability of the high endoscopic distorted lenses. By completely decoupling the computation of the camera distortion center obtained using general properties of distortion lines, even strong radial distortion effects can be perturbatively included into a pure perspective first guess zero-distortion solution.
Stud Health Technol Inform
December 2009
The aim of this work is to develop a realistic virtual model of the human brain that could be used in a neurosurgical simulation for both educational and preoperative planning purposes. The goal of such a system would be to enhance the practice of surgery students, avoiding the use of animals, cadavers and plastic phantoms. A surgeon, before carrying out the real procedure, will, with this system, be able to rehearse by using a surgical simulator based on detailed virtual reality models of the human brain, reconstructed with real patient's medical images.
View Article and Find Full Text PDFA precise cochleostomy is a crucial step in cochlear implantation, particularly if residual hearing is to be preserved. A contactless ablation of the promontory bone by a pulsed CO(2) laser system seems to be a promising approach. The bone is removed by a scan head controlled laser beam in sequential scan cycles with a pulse rate of 50-100 mus.
View Article and Find Full Text PDFThe aim of the study was to demonstrate a collision-free trajectory of an instrument through the facial recess to the site of planned cochleostomy guided by a surgery robot. The indication for cochlear implantation is still expanding toward more substantial residual hearing. A cochleostomy as atraumatic as possible will influence the preservation of inner ear function.
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