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This study examined the fingertip force variability on the left and right hand during low-level sustained precision pinch with the thumb and index finger. Ten healthy, right-handed subjects were required to pinch a device with a stable force output at 5 N for 1 min. The pinch force was recorded for the right and left hand, separately. Visual feedback was provided for the first 30 s and removed for...
We present an upper-limb rehabilitation robot for brain-injured patients. Its mechanical structure, working principle, control system and evaluating strategies on rehabilitation effect are described. The robot has passive, assistive and active training modes, especially, the impedance control algorithm with compensations is designed and adopted in the passive training mode. It can enhance proprioception...
Segmentation of brain tissue from non-brain tissue, also known as skull stripping, has been challenging due to the complexity of anatomical brain structures and variable parameters of MR imaging modalities. It has been one of the most important preprocessing steps in medical image analysis. We propose a new brain segmentation algorithm that is based on a level set based deformable model. Two different...
High myopia esotropia is a kind of special strabismus whose pathology is still uncertain. In this paper, the finite element analysis method is applied to examine some physiological hypotheses by modeling the movement of the eyeball and morbid extraocular muscles. The model stems from clinical data. Theoretical analyses are also performed to examine the effect of oblique pulley. Finally, postoperative...
Deformable models have been quite popular in medical image analysis, particularly in image segmentation. However, when applied to 3D volumetric data, their high computational cost can be a problem. In this paper, we describe a new efficient 3D segmentation method based on deformable simplex meshes. The greedy algorithm, which has proven more computational efficient and robust than physics-based method,...
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