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Related Experiment Video

Updated: Jul 9, 2026

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

Proton radiosurgery in neurosurgery.

Clark C Chen1, Paul Chapman, Joshua Petit

  • 1Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. cchen1@partners.org

Neurosurgical Focus
|December 18, 2007
PubMed
Summary

Proton radiosurgery offers superior dose conformity compared to photon radiation, especially for larger lesions. Clinical outcomes for proton stereotactic radiosurgery (SRS) are excellent and comparable to photon treatments.

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Area of Science:

  • Radiation Oncology
  • Medical Physics

Background:

  • Photon radiation exhibits exponential decay, leading to dose deposition along the entire beam path, including beyond the target.
  • Proton radiation offers precise energy deposition, with minimal to no exit dose beyond the target volume.

Purpose of the Study:

  • To review the fundamental principles of photon- and proton-based stereotactic radiosurgery (SRS).
  • To evaluate the clinical efficacy of proton-based SRS for specific conditions.

Main Methods:

  • Review of fundamental principles of photon and proton stereotactic radiosurgery.
  • Review of clinical efficacy data for proton-based SRS in treating arteriovenous malformations, vestibular schwannomas, and pituitary adenomas.

Main Results:

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  • Direct clinical outcome comparisons are challenging due to proton beams often being reserved for larger, complex cases.
  • Despite this, proton-based SRS demonstrates excellent clinical outcomes, comparable to photon-based treatments.

    • Conclusions:

    • Proton radiation provides superior dose distribution conformality over photon irradiation.
    • This advantage is more pronounced for larger lesions and is expected to improve with advanced techniques like intensity-modulated proton therapy.