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Related Experiment Video

Updated: Jun 18, 2026

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

MRI-compatible micromanipulator: Positioning repeatability tests & kinematic calibration.

Yoshihiko Koseki¹, Tamio Tanikawa, Kiyoyuki Chinzei

¹National Institute of Advanced Industrial Science and Technology, 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|December 8, 2009

Summary

This summary is machine-generated.

This study tested an MRI-compatible micromanipulator for precise positioning. The device demonstrated high repeatability for micromanipulation tasks within the MRI environment.

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Area of Science:

Medical Imaging Technology
Biomedical Engineering
Robotics

Background:

Micromanipulation within Magnetic Resonance Imaging (MRI) environments is crucial for biological and medical research.
Existing micromanipulators often face challenges with MRI compatibility and precise positioning.
Previous work established the design, implementation, and MRI compatibility of a novel micromanipulator.

Purpose of the Study:

To evaluate the positioning repeatability of an MRI-compatible micromanipulator.
To perform kinematic calibration and compare experimental results with theoretical models.
To assess the suitability of the micromanipulator for precise tasks inside an MRI scanner.

Main Methods:

Positioning repeatability tests were conducted on the MRI-compatible micromanipulator.
Kinematic calibration was performed using established procedures.
Experimental data on workspace and positioning errors were collected and analyzed.
Results were compared against theoretical predictions.

Main Results:

The micromanipulator exhibited high positioning repeatability: 0.7 microm in longitude and 3.0 microm in latitude.
Absolute positioning errors were measured at 16 microm (x-axis), 9 microm (y-axis), and 5 microm (z-axis).
The experimental workspace was found to be 50-70% smaller than theoretically predicted.

Conclusions:

The MRI-compatible micromanipulator offers high precision for micromanipulation tasks.
Kinematic calibration revealed discrepancies between theoretical and actual workspace, necessitating further model refinement.
The device shows promise for advanced applications in biological and medical research requiring in-MRI manipulation.