Further developments in the technology will make photon more cost - - PowerPoint PPT Presentation

Further developments in the technology will make photon more cost effective and considerably better than proton

Kiyonari Inamura, AFOMP 1. 1. Conventional photon modality is not necessarily Conventional photon modality is not necessarily limited to IMRT. limited to IMRT. 2. 2. Ｆ Ｆollowing modalities have excellent clinical

• llowing modalities have excellent clinical

results such as: Real time tumor tracking in results such as: Real time tumor tracking in stereotactic radiotherapy by Shirato, stereotactic radiotherapy by Shirato, stereotactic body radiotherapy by Ngata, and etc. stereotactic body radiotherapy by Ngata, and etc.

• 3. New photon modalities such as micro
• 3. New photon modalities such as micro‐

‐beam beam photon and dynamic robotics have future photon and dynamic robotics have future possibilities. possibilities.

Micro‐beam photon and robotics (Accucera, Japan)

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Conventional Micro‐beam photon

■Moving freedom 2π plane 4πsolid angle ■iso‐center fixed free ■accuracy １mm 0.2mm ■PSA axes 4 axes 6 axes

6 axes rotations of small accelerator and patient support assembly make irradiation from 4π solid angle possible. Electro‐magnetic scanning of photon micro‐beam can follow moving target volume

■ ■

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Micro beams photon of 20 rays Conventional 20 photon beams

Intensive concentration

Micro beam photons (Accucera and University of Tokyo)