Force Field Based n-Scan Alignment

Force Field Simulation Based Laser Scan Alignment

Dynamic Model for Global Alignment and Scaling

Global alignment techniques are either direct or iterative, and can generally be feature-based or intensity-based. Feature-based techniques are usually preceded by an extraction-grouping process that largely limits their usefulness. Many of these techniques are based on feature matching that makes the alignment sensitive to faulty matches. Moreover, intensity-based techniques are sensitive to i...

A Fast External Force Field for Parametric Active Contour Segmentation

Active contours or snakes are widely used for segmentation and tracking. We propose a new active contour model, which converges reliably even when the initialization is far from the object of interest. The proposed segmentation technique uses an external energy function where the energy slowly decreases in the vicinity of an edge. Based on this energy a new external force field is defined. Both...

Restoration of the Mechanical Axis in Total Knee Artrhoplasty Using Patient-Matched Technology Cutting Blocks. A Retrospective Study of 132 Cases

Background: The aim of this study is to evaluate the accuracy of bone cuts and the resultant alignment, using theMyKnee patient specific cutting blocks.Methods: We retrospectively reviewed 132 patients undergoing primary TKR for osteoarthritis by one single surgeon.The operative time, the preoperative Hip-Knee-Ankle (HKA) axis based on the CT-scan, the postoperative HKA axisbased on long axis s...

Optimization of Ankle-Foot Prosthesis with Active Alignment by Passive Elements

Today, often ankle’s active prosthesis is used for transtibial amputated people’s walking, because these prostheses have some advantages such as increasing power and decreasing metabolism. In most of active prosthesis in order to create a movement or increase the force at the push-off, electrical actuators are used like a motor. In cases where a higher-power motor is necessary, the capacity, we...