Karen J. Reynolds

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Virtual reality (VR) surgical simulations are among the most difficult software applications to develop mainly because of the type of user interactions that they must support. Surgery typically includes precise cutting of often intricate structures. Modelling these structures and accurately simulating their response to user interaction requires many(More)
The development and validation of a virtual generic 3D model of the distal femur using computer graphical methods is presented. The synthesis of the generic model requires the following steps: acquisition of bony 3D morphology using standard computed tomography (CT) imaging; alignment of 3D models reconstructed from CT images with a common coordinate(More)
This study used Monte Carlo methods to simulate the effects of variability and uncertainty in inertial body segment parameters (BSPs) on joint torques calculated using inverse dynamics. The average and standard deviation values of BSPs from previously published studies were used as inputs into the Monte Carlo simulation. Data from five groups were(More)
The pathogenesis of cystic fibrosis (CF) airway disease is not well understood. A porcine CF model was recently generated, and these animals develop lung disease similar to humans with CF. At birth, before infection and inflammation, CF pigs have airways that are irregularly shaped and have a reduced caliber compared to non-CF pigs. We hypothesized that(More)
Three-dimensional (3D) characterization of cortical porosity, most of which is under 100 µm in diameter, is usually confined to measurements made in 3–4 mm diameter cylinders of bone. We used micro-computed tomography (micro-CT) scanning of entire transaxial cross sections of human proximal femoral shafts (30–35 mm diameter) to quantify regional variation(More)
In this paper, we improve our previous work to recover the user interacting virtual object's contact surface features based on the recorded visual-haptic data for replaying haptic feeling. First the haptic stylus motion is tracked from the recorded screenshot images of the haptic virtual environment (HVE). The virtual object's contact surface can then be(More)