Manuel Vonthron

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The development of minimally invasive surgical techniques using magnetism is expanding. Our research group is exploring catheter steering using the gradient field of a modified clinical Magnetic Resonance Imaging (MRI) system. This paper focuses on the upgrade of the MRI testing platform towards an integrated system allowing for in vitro and in vivo(More)
Magnetic Resonance Navigation (MRN) aims at navigating artificial or synthetic untethered micro-devices and microrobots using an upgraded clinical Magnetic Resonance Imaging (MRI) system. For larger MRI-based navigated entities, past experiments proved that software-based upgrades only were sufficient. But for microrobots with an overall diameter of only a(More)
A new actuation principle which permits omnidirectional steering for a swimming robot using a magnetic resonance imaging scanner is presented. The robot fish is made of a ferromagnetic head and a flexible tail. It is actuated by transverse oscillating magnetic gradients. The swimming performances of the robot fish are studied for varying tail length as well(More)
PURPOSE To assess the ability to control the steering of a modified guidewire actuated by the magnetic force of a magnetic resonance imaging system with additional gradient coils for selective arterial catheterization in rabbits. METHODS Selective catheterizations of the right renal artery, left renal artery, superior mesenteric artery, and iliac artery(More)
The onset of puberty is the sum of complex and multifactorial mechanisms resulting from the action of both activating and inhibiting factors, leading to the maturation of the gonads and the ability to reproduce. Many contributors to pubertal development are involved in fat mass acquisition and their action is relayed through the hypothalamus. It is(More)
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