Cryogen-free Light-weight Superconducting Beam Bending Magnets for Proton Therapy

用于质子治疗的无制冷剂轻型超导光束弯曲磁体

• 批准号: 9333468
• 负责人: Shahin Pourrahimi
• 金额: $ 50.67万
• 依托单位: SUPERCONDUCTING SYSTEMS, INC
• 依托单位国家: 美国
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-22 至 2019-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9333468
• 关键词: Carbon; Characteristics; Computer software; Consumption; Cyclotrons; Dose; Economics; Goals; Health; Helium; Institutes; Iron; Liquid substance; Magnetic Resonance Imaging; Magnetism; Maintenance; Massachusetts; Measures; Modality; Modeling; Optics; Patients; Penetration; Phase; Physics; Plasma; Protons; Radiation; Radiation therapy; Ramp; Reporting; Rotation; Scanning; Science; Shapes; Synchrotrons; System; Technology; Temperature; Testing; Tissues; Weight; Work; cancer therapy; cancer type; commercialization; cost; density; design; dipole moment; flexibility; hadron; innovation; irradiation; light weight; magnetic dipole; magnetic field; operation; particle beam; proton beam; proton therapy; rate of change; success; superconductivity; tumor

 DESCRIPTION (provided by applicant): The overall goal of this Fast Track project is to combine innovations in superconducting magnet design and new magnet topologies to create a lightweight toroidal beam bending magnet for rotating gantries used in proton beam therapy. The magnet is robust for pencil-beam scanning therapy, as the magnet is dry (no liquid helium coolant) and can withstand AC losses from rapidly varying magnetic fields (needed for varying the energy of beam to adjust penetration of the beam into the tumor). This toroidal bending magnet will use a unique, cryogen-free self- shielded superconducting magnet that makes the scanner attractive for pencil beam scanning using a proton beam. The proposed bending magnet uses an innovative magnet topology that is constant field along the beam and self-shields the magnetic field, eliminating the need and weight of the iron. The combination of proven technologies in design and manufacturing of high-field (1.5T and higher) cryogen- free MRI magnets and the innovative constant-field toroidal field beam bending magnet results in a significant breakthrough gantry design.

 描述（由申请人提供）：该快速通道项目的总体目标是将超导磁体设计和新磁体拓扑的创新结合起来，创建一种用于质子束治疗中使用的旋转机架的轻型环形束弯曲磁体。该磁体对于铅笔来说是坚固的。 -束扫描治疗，因为磁体是干燥的（无液氦冷却剂）并且可以承受快速变化的磁场带来的交流损耗（需要改变束的能量以调整束对肿瘤的穿透力）。环形弯曲磁体将使用独特的无冷冻剂自屏蔽超导磁体，这使得扫描仪对于使用质子束的笔形束扫描具有吸引力。拟议的弯曲磁体采用创新的磁体拓扑，该拓扑沿束和自屏蔽具有恒定场。结合了高场（1.5T 及更高）无冷冻剂 MRI 磁体的设计和制造方面的成熟技术以及创新的恒定场环形场束弯曲。磁铁带来了龙门设计的重大突破。