Particle beam therapy (hadrontherapy): basis for interest and clinical experience

Area of Science:

• Medical physics
• Radiation oncology
• Particle therapy

Background:

• Particle or hadron beams (protons, neutrons, helium, carbon, oxygen, neon ions) possess distinct physical and radiobiological properties compared to conventional photon radiotherapy.
• These properties offer theoretical advantages for cancer treatment.

Purpose of the Study:

• To review the properties of hadron beams versus photons.
• To analyze the clinical experience and indications for hadrontherapy in treating neoplastic lesions.
• To evaluate the efficacy and cost-effectiveness of hadrontherapy.

Main Methods:

• Literature review of published data from global hadrontherapy centers.
• Analysis of treatment outcomes for various cancers.
• Comparison of hadrontherapy with conventional photon therapy.

Main Results:

• Hadrontherapy demonstrates superior disease-free survival for selected tumors, including uveal melanomas, base of skull/spinal chordomas, and chondrosarcomas.
• The benefits of hadrontherapy are enhanced when combined with advanced radiotherapy techniques like on-line imaging and 3D conformal radiotherapy.
• Despite higher initial costs, hadrontherapy may be cost-effective when considering the failures of less effective conventional treatments.

Conclusions:

• The growing interest in hadrontherapy is supported by current results.
• Further studies on efficacy and optimal dosing are necessary.
• Hadrontherapy is a promising modality for specific cancer types, especially when integrated with modern radiation delivery technologies.