Related Experiment Videos
Accelerated fractionation vs hyperfractionation: rationales for several treatments per day
International Journal of Radiation Oncology, Biology, Physics
|February 1, 1983
Summary
Multiple daily radiation doses, including accelerated fractionation and hyperfractionation, aim for therapeutic gains. Regimen choice depends on tumor cell regeneration, with a method based on potential doubling times presented.
Area of Science:
- Radiation Oncology
- Cancer Therapy
- Radiotherapy Physics
Background:
- Conventional radiotherapy fractionation may be suboptimal for certain tumors.
- Multiple daily radiation doses (low Linear Energy Transfer - LET beams) offer potential therapeutic advantages.
- Accelerated fractionation shortens overall treatment time; hyperfractionation increases dose fractions.
Purpose of the Study:
- To review clinical experience with multiple daily radiation dose regimens.
- To compare accelerated fractionation and hyperfractionation strategies.
- To present a method for selecting between these regimens based on tumor biology.
Main Methods:
- Review of published clinical studies on accelerated fractionation and hyperfractionation.
- Analysis of rationales for each fractionation strategy.
- Development of a selection method based on tumor clonogen potential doubling times.
Main Results:
- Pure accelerated fractionation and hyperfractionation are limited by acute normal tissue reactions.
- Hybrid regimens have emerged, sometimes lacking clear rationale.
- Tumor clonogen regenerative capability is key in choosing between regimens.
Conclusions:
- Multiple daily radiation doses can enhance therapeutic outcomes.
- The choice between accelerated fractionation and hyperfractionation should be guided by tumor-specific parameters.
- A method utilizing potential doubling times aids in regimen selection for improved cancer treatment.