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Focal Laser Ablation of Prostate Cancer: An Office Procedure
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Towards a Robotically Steerable Laser Ablation Probe.

Julio Adrian Ceja1, Saeed Rezaeian1, J Rodrigo Vélez-Cordero2

  • 1Department of Mechanical Engineering, University of California Riverside, Riverside, CA 92521 USA.

... International Symposium on Medical Robotics. International Symposium on Medical Robotics
|August 19, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a robotically steerable laser ablation probe for improved interstitial thermal therapy. The novel probe enables conformable ablation of complex tumors, enhancing treatment precision and safety.

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Area of Science:

  • Medical Robotics
  • Biomedical Engineering
  • Laser Medicine

Background:

  • Current laser interstitial thermal therapy (LITT) uses straight probes, limiting treatment of large or irregularly shaped tumors.
  • Ineffective ablation patterns with conventional probes can lead to suboptimal therapeutic outcomes.

Purpose of the Study:

  • To develop and evaluate a robotically steerable laser ablation probe for enhanced interstitial thermal therapy.
  • To enable precise, conformable ablation of complex tumor geometries.
  • To improve the safety and efficacy of laser-based tumor treatments.

Main Methods:

  • Design and fabrication of a robotically steerable probe incorporating a Polydimethylsiloxane (PDMS)/Carbon nanoparticles (CNPs) mixture.
  • Utilizing a multi-mode optical fiber within the probe tip to act as a laser-activated heater.
  • Finite element analysis for simulating laser-induced thermal transformation.
  • Experimental characterization of robot motion, heating effects, and in vitro ablation.

Main Results:

  • Successful design and fabrication of the steerable laser ablation probe.
  • Demonstration of controlled robotic motion within soft tissue.
  • Characterization of the heating mechanism and its effects.
  • Validation of in vitro ablation capabilities for conformable treatment.

Conclusions:

  • The robotically steerable laser ablation probe offers a significant advancement over conventional LITT methods.
  • This technology enables precise, multi-point ablation for treating large and complex tumors.
  • The integrated heating mechanism enhances procedural safety in interstitial thermal therapy.