Related Experiment Video
Updated: Feb 27, 2026
Utilizing vmTracking to Improve the Accuracy of Multi-Animal Pose Estimation in Rodent Social Behavior Studies
Published on: November 7, 2025
Manipulator-driven selection of semi-active MR-visible markers
Junmo An1, Andrew G Webb2, Dipan J Shah3
1Medical Robotics Laboratory, University of Houston, Houston, TX, USA.
Background:
A method for the identification of semi-active fiducial magnetic resonance (MR) markers is presented based on selectively optically tuning and detuning them.
Methods:
Four inductively coupled solenoid coils with photoresistors were connected to light sources. A microcontroller timed the optical tuning/detuning of coils and image collection. The markers were tested on an MR manipulator linking the microcontroller to the manipulator control to visibly select the marker subset according to the actuated joint.
Results:
In closed-loop control, the average and maximum were 0.76° ± 0.41° and 1.18° errors for a rotational joint, and 0.87 mm ± 0.26 mm and 1.13 mm for the prismatic joint.
Conclusions:
This technique is suitable for MR-compatible actuated devices that use semi-active MR-compatible markers.
More Related Videos
11:00Hand Controlled Manipulation of Single Molecules via a Scanning Probe Microscope with a 3D Virtual Reality Interface
Published on: October 2, 2016
08:24Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
Published on: August 30, 2016