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BACKGROUND Remote-controlled catheter navigation systems have recently been introduced into minimally invasive vascular surgery and some of them have already been applied in clinical practice. Steerable catheters with improved manoeuvrability play an important role in these innovations for conventional catheterization. METHODS This review details the(More)
A fast two-step marker-controlled watershed image segmentation method in CIELAB color space is presented in this paper. We choose a number of seed points distributed nearly uniformly as the makers to perform the first marker watershed segmentation step, and obtain superpixels of the input image. These markers have the minimal gradient in a 3 ×3(More)
In order to offer a method for the rehabilitation of injured fingers and a means of quantitative detection and evaluation, an exoskeleton based continuous passive motion (CPM) machine is presented in this paper. Corresponding to each finger of human hand, the CPM machine has 4 degrees of freedom (DOF) driven by two DC motors. The joint force and position(More)
Stroke is very common and always leads to severe hand impairment. Traditional robotic systems have been introduced to assist therapy for a long time and already achieved certain effect. However, with further development of therapy strategies in the last few years, higher request to the rehabilitation robot has been put forward. Thus, we are developing a(More)
BACKGROUND The emergence of the active catheter has prompted the development of catheterization in minimally invasive surgery. However, it is still operated using only the physician's vision; information supplied by the guiding image and tracking sensors has not been fully utilized. METHODS In order to supply the active catheter with more useful(More)
This paper presents a novel upper extremity motor function rehabilitation system and an assessment system. The rehabilitation system is an active rehabilitation that can be manipulated by patients through a haptic device and an inertia sensor to perform a tracking task in virtual environment with coordination training of bilateral upper extremity. The(More)
Human hand is easy to be injured. As physical rehabilitation therapy after a hand operation always takes a long time, the curative effect gets worse and the social and financial hardship with physical deterioration can be caused. A CPM machine is a mechanism based on the rehabilitation theory of continuous passive motion (CPM). To improve rehabilitation(More)
Hyperpolarization-activated currents (Ih) mediated by hyperpolarization-activated cyclic nucleotide-gated (HCN) channels modulate excitability of myelinated A- and Ah-type visceral ganglion neurons (VGN). Whether alterations in Ih underlie the previously reported reduction of excitability of myelinated Ah-type VGNs following ovariectomy (OVX) has remained(More)