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Updated: May 31, 2026

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Huygens' based re-simulation for enabling MRI adaptive hyperthermia.

Ellen van Wesel1,2, Kemal Sumser1,2, Sergio Curto1

  • 1Radiation Therapy, Erasmus MC Cancer Institute.

Physics in Medicine and Biology
|May 29, 2026
PubMed
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Ticept: Wideband Electrical Properties Tomography by Tissue Composition Assessment With Quantitative <math><semantics><mrow><msup><mo> </mo> <mrow><mn>1</mn></mrow></msup></mrow> <annotation>$$ {}^1 $$</annotation></semantics></math> H <math><semantics><mrow><msup><mo> </mo> <mrow><mn>23</mn></mrow></msup></mrow> <annotation>$$ {}^{23} $$</annotation></semantics></math> Na <math><semantics><mrow><msup><mo> </mo> <mrow><mn>39</mn></mrow></msup></mrow> <annotation>$$ {}^{39} $$</annotation></semantics></math> K Multinuclear MRI.

Magnetic resonance in medicine·2025

Hyperthermia treatment planning (HTP) is accelerated using the Huygens

Area of Science:

  • Medical Physics
  • Electromagnetics
  • Computational Biology

Background:

  • Hyperthermia treatment (HT) efficacy depends on accurate temperature distribution.
  • Patient positioning errors during HT limit treatment planning (HTP) effectiveness.
  • Real-time adaptation of HTP using MRI data is crucial but computationally intensive.

Purpose of the Study:

  • To investigate the Huygens' principle for accelerating electromagnetic simulations in HTP.
  • To evaluate the Huygens' approach for compensating patient displacement during HT.
  • To assess the impact of Huygens' method on the target-to-hotspot quotient (THQ).

Main Methods:

  • Full-wave electromagnetic simulations performed using Sim4Life software.
  • Cylindrical phantoms and twelve patient models utilized within the MRCollar applicator.
Keywords:
adaptiveelectromagnetic simulationshyperthermiatreatment planning

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  • Huygens' principle applied to accelerate simulations and model patient displacement.

    • Main Results:

    • Simulation time reduced from 92 minutes to 4.5 minutes without accuracy loss.
    • THQ bias decreased from 43.6% to 4.3% after re-simulation with Huygens' method.
    • Accurate source modeling required a patient-shaped muscle-equivalent load.

    Conclusions:

    • The Huygens' approach enables rapid, online adaptive HT by recalculating electric fields.
    • This method significantly mitigates positioning inaccuracies, improving THQ accuracy.
    • Achieved average THQ error of -0.6% demonstrates the method's clinical potential.