11 accepted papers
We present a lightweight real-time method to extract 3D ego-motion using a range flow constraint equation, point patch covariance, and a least squares solution. Our method exploits the structured data provided by range sensors, like rotating LiDARs, to attain 6 DOF odometry without building a map or
Cochlear-implant electrode arrays (EAs) must be inserted accurately and precisely to avoid damaging the delicate anatomical structures of the inner ear. It has previously been shown on the benchtop that using magnetic fields to steer magnet-tipped EAs during insertion reduces insertion forces, which
Remote magnetic control of soft magnetic objects has been limited to 2D orientation and 3D position. In this letter, we extend the five degree-of-freedom (5-DoF) control approach to full 6-DoF. We prove that 6-DoF control is possible for objects that have an apparent magnetic susceptibility tensor w
Deep Brain Stimulation is used to treat Parkinson's disease and other neurological disorders by implanting an electrode into the brain via a straight-path needle insertion. Enabling course correction and curved trajectories by using a steerable needle has the potential to improve operative outcomes.…
Three-dimensional (3-D) tracking of microrobots is demonstrated using stereo holographic projections. The method detects the lateral position of a microrobot in two orthogonal in-line holography images and triangulates to obtain the 3-D position in an observable volume of 1 cm <inline-formula xmlns:
A robust automated system to collect protein crystals for X-ray crystallography is presented. This system uses an ultraviolet imaging system based on commercial off-the-shelf components, a magnetically manipulated tool, and a resilient behavior-based controller. The system is validated by collecting
Digital holography is used to track the three-dimensional position of a magnetic microrobot maneuvered in real time by means of an electromagnetic manipulation system. The method presented is able to process holograms at 40 Hz with a position accuracy in the imaging plane and in depth of <inline-for
Shape shifting soft microrobots are generated from self-folding hydrogel bilayer structures. The folding conditions are analyzed to develop an optimal strategy for producing desired three-dimensional shapes. We present two different methods for programming magnetization in these microrobots that are
A magnetic-tip steerable needle is presented with application to aiding deep brain stimulation electrode placement. The magnetic needle is 1.3mm in diameter at the tip with a 0.7mm diameter shaft, which is selected to match the size of a deep brain stimulation electrode. The tip orientation is contr
This is the first demonstration of a modular and reconfigurable magnetic-manipulation system with integral ferromagnetic material. This system-which includes multiple Omnimagnets, each comprising three orthogonal solenoids and a spherical ferromagnetic core-is capable of dexterous manipulation of a…
This paper presents a method to localize a magnetically guided catheter using a single rotating C-Arm. Because the three dimensional position of the catheter tip, when extracted from a single view, contains large uncertainties, we propose to combine multiple views by rotating the C-Arm and using a K…