Heavy particle beam irradiation device and treatment system

The heavy particle beam irradiation apparatus addresses inefficiencies by adjusting magnetic field strength and arc trajectories to minimize beam divergence and loss, enhancing treatment precision and efficiency.

WO2025158755A1 Publication Date: 2025-07-31KK TOSHIBA +1
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Patent Information

Application Number
PCT/JP2024/040569
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-01-23
Filing Date
2024-11-15
Publication Date
2025-07-31

AI Technical Summary

Technical Problem

Existing heavy particle beam irradiation devices face inefficiencies due to long flight distances and divergence issues, leading to beam loss and decreased transport efficiency, particularly when using electromagnets for deflecting beams, which limits design freedom and increases magnetic field consumption.

Method used

A heavy particle beam irradiation apparatus with variable magnetic field strength and adjustable arc trajectories using electromagnets with superconducting coils and a control unit to manage excitation current based on emission angles, minimizing beam divergence and contact with electromagnet surfaces.

Benefits of technology

Improves beam transport efficiency and reduces beam loss by optimizing magnetic field design, allowing for precise targeting and reduced power consumption.

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Abstract

Provided is a heavy particle beam irradiation device that has an improved degree of freedom in designing electromagnets, and excellent efficiency.　A heavy particle beam irradiation device (10) comprises: an emission port (31) that emits heavy particle beams (18) in a direction of a prescribed emission angle φ from a fixed point on a reference line (16) at which an isocenter (15) intersects; electromagnets (45a, 45b) that form magnetic field regions (11a, 11b) in which magnetic fields (25a, 25b) are in opposite directions across the reference line (16); and an electric current supply unit that supplies excitation electric current to the electromagnets (45a, 45b) such that the strengths of the magnetic fields (25) are different according to the emission angle φ, and causes the heavy particle beams (18) to converge at the isocenter (15).
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