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Stereotactic Radiosurgery for Gynecologic Cancer
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Treatment planning for spinal radiosurgery : A competitive multiplatform benchmark challenge.

Christos Moustakis1, Mark K H Chan2, Jinkoo Kim3

  • 1Department of Radiation Oncology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany. christos.moustakis@ukmuenster.de.

Strahlentherapie Und Onkologie : Organ Der Deutschen Rontgengesellschaft ... [Et Al]
|May 27, 2018
PubMed
Summary

Intensity Modulated Arc Therapy (IMAT) plans for spinal radiosurgery achieved high quality across multiple centers and systems. Simple IMAT techniques outperformed previous CyberKnife radiosurgery benchmarks, demonstrating superior treatment plan quality.

Keywords:
Benchmark studyMulticenterMultiplatformSpinal radiosurgeryStereotactic body radiation therapyTreatment planning challenge

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Area of Science:

  • Radiation Oncology
  • Medical Physics
  • Radiosurgery

Background:

  • Spinal radiosurgery requires precise treatment planning to maximize tumor coverage while sparing critical structures.
  • Evaluating the quality of treatment plans across different planning and delivery systems is crucial for optimizing patient outcomes.
  • Robotic delivery and Intensity Modulated Arc Therapy (IMAT) are advanced techniques used in modern radiosurgery.

Purpose of the Study:

  • To compare the quality of spinal radiosurgery treatment plans generated by different planning and delivery systems.
  • To assess the performance of robotic delivery and IMAT approaches against established benchmarks.
  • To identify potential biases related to individual planning abilities by using multiple centers with standardized systems.

Main Methods:

  • Internationally recognized experts from 12 centers participated, utilizing various treatment planning systems.
  • Treatment plans for three complex spine lesions were compared against benchmark plans, including those for CyberKnife radiosurgery (CKRS).
  • All plans were evaluated using a pre-established ranking system to objectively assess plan quality.

Main Results:

  • All 12 participating centers achieved or surpassed the benchmark plan quality for at least one case.
  • Gantry-based IMAT with simple planning techniques significantly outperformed static gantry intensity modulated radiation therapy (IMRT) and CKRS plans (mean rank 1.2 vs. 3.1, p=0.002).
  • Plan quality was found to be more dependent on the planner than the specific system used, with small absolute differences in dosimetry.

Conclusions:

  • High-quality treatment plans for complex spinal radiosurgery are achievable across various systems and centers.
  • Simple IMAT techniques demonstrate superior plan quality compared to established CKRS benchmarks.
  • The findings suggest that IMAT is a highly effective modality for spinal radiosurgery planning.