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Toward an expanded view of radiosurgery
John R Adler1, Federico Colombo, M Peter Heilbrun
1Department of Neurosurgery, Stanford University School of Medicine, Stanford, California 94305-5327, USA. jra@stanford.edu
Neurosurgery
|December 3, 2004
Summary
Radiosurgery, traditionally a single-session radiation treatment, can be redefined. Staging or hypofractionation allows incorporating radiotherapy principles to enhance radiosurgical outcomes for better tumor ablation.
Area of Science:
- Radiation Oncology
- Neurosurgery
Background:
- Radiosurgery and radiotherapy historically differed in normal tissue protection strategies.
- Radiosurgery uses precise targeting for rapid dose falloff, while radiotherapy uses fractionation for normal tissue recovery.
- Modern technology challenges the single-session definition of radiosurgery.
Purpose of the Study:
- To propose a revised definition of radiosurgery.
- To advocate for integrating radiobiological principles into radiosurgical treatment planning.
Main Methods:
- Review of historical distinctions between radiosurgery and radiotherapy.
- Analysis of modern image-guided, frameless technologies.
- Proposal of a new definition based on surgical involvement and dose targeting.
Main Results:
- The traditional single-session definition of radiosurgery is considered restrictive.
- Staging or hypofractionation enables the application of radiotherapy's radiobiological principles to radiosurgery.
- A proposed definition emphasizes surgical participation and ablative intent with precise, conformal radiation doses.
Conclusions:
- Radiosurgery should not be exclusively defined by single-session delivery.
- Integrating radiobiological principles via staging or hypofractionation can improve radiosurgical efficacy.
- A comprehensive definition of radiosurgery includes surgical involvement and precise, ablative radiation targeting.