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Related Experiment Video

Updated: Jul 3, 2025

Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning
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A 3D-printed phantom for stereotactic body radiation therapy simulation.

Ying-Hao Yu1, Tsung-Yu Yen2, Shih-Kai Hung3,4

  • 1Department of Electrical Engineering and AIM-HI, National Chung Cheng University, Taiwan.

Biomedical Physics & Engineering Express
|February 13, 2024
PubMed
Summary

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This study introduces a 3D-printed phantom simulating lung cancer motion for radiation therapy. It accurately tracks tumors, improving precision and reducing radiation dose to healthy tissues.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Biomedical Engineering

Background:

  • Accurate radiation delivery in lung cancer treatment requires precise tumor targeting.
  • Minimizing radiation dose to healthy tissues necessitates reducing irradiation field margins.
  • Tumor motion during radiation therapy introduces uncertainty in treatment accuracy.

Purpose of the Study:

  • To develop and validate a novel 3D-printed phantom for simulating lung tumor and thoracic motion.
  • To assess the accuracy of a robotic system in replicating tumor movement during simulated breathing.
  • To evaluate the phantom's utility for radiotherapy training and dosimetry measurements.

Main Methods:

  • A 3D-printed phantom simulating thoracic and lung tumor movement was developed.
Keywords:
PIDKSBRTlinear delta robot armlung tumorphantom

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  • A miniature Delta robot arm controlled tumor displacement up to 20 mm.
  • Simulated breathing movements (12 mm Anterior-Posterior) were performed to test tracking accuracy.

    • Main Results:

    • The robotic system achieved control errors within 10% during simulated thoracic motion.
    • Average tracking errors for the simulated lung tumor were consistently below 1.1 mm.
    • The 3D-printed phantom demonstrated reliable simulation capabilities.

    Conclusions:

    • The developed 3D-printed phantom with a robotic arm offers a reliable tool for lung cancer radiotherapy.
    • This phantom is suitable for pre-treatment training and dosimetry verification, particularly for Stereotactic Body Radiation Therapy (SBRT).
    • The system enhances precision in radiation delivery, crucial for minimizing off-target dose.