[Current use and prospects for hadron therapy in 2015]

Area of Science:

• Medical Physics
• Radiation Oncology
• Particle Therapy

Background:

• Hadron therapy, utilizing protons and carbon ions, is expanding worldwide.
• Current limitations include high facility costs and a need to define optimal indications beyond historical uses like eye melanomas and salivary gland tumors.
• Over 100 clinical trials comparing photon, proton, and carbon ion therapies are ongoing since 2013.

Purpose of the Study:

• To assess the current status and future prospects of hadron therapy.
• To explore the role of proton and carbon ion therapy for various cancer types.
• To discuss technological and scientific efforts to overcome cost barriers and optimize treatment delivery.

Main Methods:

• Review of ongoing clinical trials comparing different radiotherapy modalities.
• Analysis of technological advancements in beam scanning, image guidance, and treatment planning.
• Discussion of radiobiological research and long-term effects assessment.

Main Results:

• Established indications for proton therapy (eye melanomas, skull base, pediatric tumors) and carbon ions (salivary glands, paranasal sinus, soft tissue sarcomas) remain.
• The role of these modalities for other cancers like prostate and lung remains under investigation.
• Significant technological and scientific efforts are underway to reduce costs and enhance treatment efficacy.

Conclusions:

• Particle therapy's role is evolving, driven by ongoing research, technological innovation, and cost reduction efforts.
• Hypofractionation and careful patient selection are key to integrating particle therapy effectively.
• Long-term outcome assessment is crucial for correlating dosimetric data with adverse effects and establishing definitive indications.