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Related Experiment Video

Updated: May 25, 2025

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
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Emergency Position Recovery Using Forward Kinematics in Robotic Patient Positioning Systems for Radiosurgery.

Alaa Saadah1, Laszlo Fadgyas2, Donald Medlin2

  • 1Doctoral School of Informatics, University of Debrecen, Kassai útca 26, 4028 Debrecen, Hungary.

Sensors (Basel, Switzerland)
|February 26, 2025
PubMed
Summary
This summary is machine-generated.

This study developed a forward kinematics (FK) model for robotic radiosurgery positioning systems. The model ensures precise patient positioning during emergency interruptions, enhancing treatment safety and accuracy.

Keywords:
dual-loop controlemergency interruption handlingforward kinematics (FK)medical roboticsprecision positioningprimary encodersradiation therapyradiosurgeryrobotic patient positioningsecondary encoders

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Area of Science:

  • Medical Robotics
  • Radiation Oncology
  • Kinematics

Background:

  • Precise patient positioning is critical in radiosurgery for accurate tumor targeting and minimizing damage to healthy tissues.
  • Robotic systems offer potential for enhanced precision but require robust solutions for operational interruptions.

Purpose of the Study:

  • To develop and validate a robust forward kinematics (FK) model for a robotic patient positioning system.
  • To ensure accurate patient positioning during emergency interruptions like power loss or emergency stops.

Main Methods:

  • Developed a forward kinematics (FK) model integrating data from primary and secondary encoders.
  • Implemented a dual-loop feedback control architecture for enhanced precision and stability.
  • Validated the model through simulations and experimental testing.

Main Results:

  • The FK model reliably determined the patient bed's exact position during simulated interruptions.
  • Sub-millimeter positional accuracy was maintained throughout operation and recovery phases.
  • The system demonstrated safe and accurate resumption of treatment post-interruption.

Conclusions:

  • The integrated FK model and encoder feedback are crucial for the safety, reliability, and precision of robotic radiosurgery.
  • This approach addresses key challenges in medical robotics for radiation therapy, particularly concerning system interruptions.