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The purpose of this study is to develop a magnetic resonance (MR)-compatible stimulation device that can passively and actively provide flexion and extension movements to the two joints of the fingers independently without limiting the hand posture, and confirm the feasibility of the device through an MR-compatibility experiment and fMRI experiment. The developed device is composed of four parts:...
This study proposes a novel MRI-powered robotic system controlled with the magnetic field generated by a magnetic resonance imaging (MRI) scanner. In the proposed system, we use an MRI-powered actuator unit proposed in the previous study and a spherical positioning mechanism. The actuator unit contains a ferromagnetic sphere, which acts as a power source and is used to control the positioning unit...
This paper describes a magnetic resonance imaging (MRI) compatibility assessment of our lower-extremity motion simulator called LoMS which provides gait-like motion for a wearer within his/her lying posture during functional MRI (fMRI) imaging. We confirmed that the existence and the movement of LoMS do not decrease the fMRI image quality when the distance between LoMS and the head coil of MRI is...
This study proposes a novel robotic system controlled by the magnetic forces generated from Magnetic Resonance Imaging (MRI) scanner. In the proposed system, ferromagnetic particles are used to actuate the device, while all other parts are made of nonmagnetic materials. The possible range of motion for the particles is investigated by using the common sequence which is usually available for MR imaging...
Regeneration and reconnection of the injured nerves are still challenging tasks despite the stunning progress in both material development and micro-surgical procedures. Ideal implant should provide complex regenerative assistance, including physical guidance for axon outgrowth; be a reservoir for factors attracting/inducing stem cells as well as the tissue-forming factors; provide a matrix for cell...
This paper describes a novel motion simulator for the lower extremities of human in a magnetic resonance imaging (MRI) environment. This motion simulator provides a wearer with physical supports to move their lower extremities or physical constrains as well as floor reactive force on bottoms of their feet during gait-like motion in an MRI room so that brain activities could be simultaneously measured...
Recent advances in the study of human assistive robots have led to requests for ethical review for clinical trials during the development process. In this environment, many developers have found it difficult to understand the criteria for these ethical reviews. One of the basic reasons for this difficulty is the methodology in robotics. That is, trials in the development of robotics are characterized...
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