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This paper presents a face registration method and a surgical instrument tracking method for Image-guided Surgical Navigation System (ISNS). In ISNS, we start the process by reconstructing 3d point cloud of patient using a proactive structured light visual system and then accurately complete face registration based on Iterative Closest Point (ICP) algorithm. We utilize special markers to represent...
Somatosensory evoked potential (SEP) is a useful, noninvasive technique widely used for spinal cord monitoring during surgery. One of the main indicators of a spinal cord injury is the drop in amplitude of the SEP signal in comparison to the nominal baseline that is assumed to be constant during the surgery. However, in practice, the real-time baseline is not constant and may vary during the operation...
This study proposed a support vector regression model applied in prediction of intraoperative somatosensory evoked potential changes associated with physiological and anesthetic changes. This model was developed from probability distribution and support vector machines. The predicted results showed that observed and predicted SEP has similar variation trend with different values, with acceptable errors...
Fast, accurate registration between image space and patient space is the key point to surgical navigation system. In this paper, we research and implement an face matching method based on biometri. Against to the smooth, textured feature of human face, we built a proactive structured light vision system, to get patient's facial point cloud, proposed and implemented a rough face point cloud registration...
In minimally invasive surgery, steerable needle is needed to perform medical tasks in the deep of a human body. In some cases, a one-direction bendable needle can satisfy actual needs. Therefore, a one-direction bendable articulated needle is proposed in this paper. The proposed needle consists of a beveltip head, articulations, and sections. Articulations can only be bent along the tip direction...
The purpose of this paper is to investigate the time-frequency analysis of somatosensory evoked potentials (SEP) and its potential application to intraoperative spinal cord monitoring. In this study, SEP signals were recorded from 97 adolescent patients undergoing surgical correction of idiopathic scoliosis. The time-frequency distributions of SEP were observed during surgery by analysing averaged...
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