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Method for optodynamic source localization during Er:YAG laser ablation.

Georgije Bosiger1, Tadej Perhavec, Marko Marinček

  • 1Fotona d.d., Stegne 7, 1000 Ljubljana, Slovenia.

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Summary
This summary is machine-generated.

We developed an improved optodynamic (OD) method for precise distance and energy measurement during laser ablation. This technique achieves approximately 1% relative error, enhancing surgical and medical applications.

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Area of Science:

  • Biomedical Engineering
  • Laser Physics
  • Acoustics

Background:

  • Laser ablation is a crucial technique in surgery and medicine.
  • Accurate monitoring of laser-induced effects is essential for safety and efficacy.
  • Optodynamic (OD) methods offer a non-contact approach for analyzing laser-tissue interactions.

Purpose of the Study:

  • To present an improved optodynamic (OD) method for precise distance and energy measurement.
  • To validate the enhanced OD method's accuracy and reliability.
  • To demonstrate the potential for real-time OD monitoring in clinical settings.

Main Methods:

  • The study utilizes an improved optodynamic (OD) method based on the point explosion model.
  • Distance and energy are determined by analyzing the time of flight and compressive phase duration of OD signals.
  • The finite aperture of the piezoelectric sensor is incorporated to enhance measurement accuracy.

Main Results:

  • The improved OD method achieves a relative error of approximately 1% in distance measurement.
  • Experimental validation using an Er:YAG laser and water phantom shows excellent agreement between measured and theoretical OD signals.
  • The method accurately estimates both the distance to the OD source and the released energy.

Conclusions:

  • The enhanced OD method provides a highly accurate and reliable means for measuring laser-induced parameters.
  • Accounting for sensor aperture significantly improves measurement precision.
  • This technique paves the way for practical on-line optodynamic monitoring in laser surgery and medicine.