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Abstract #4347

Flanged-Edge Transverse Gradient Coil Design for a Hybrid LINAC-MRI System

Limei Liu1, Hector Sanchez-Lopez1, Feng Liu1, Stuart Crozier1

1The University of Queensland, Brisbane, Queensland, Australia

Combined Linear accelerator (LINAC) - MRI systems can provide image-guided radiotherapy treatment. These systems require splitting of the MRI scanner to provide a central gap large enough to ensure dual access for the accelerator and the patient. This raises technical difficulties for maintaining high gradient coil performance. In this research, a dedicated split transverse gradient coil was designed with a flange connected to the central coil end and compared to existing coil designs. It was found that a flanged-edge coil design produced manageable coil performance and eddy currents.

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Keywords

accelerator access accurate acoustic actively addressed allows alternate alternative aluminum appear axial better body bore boundary cancer central classic clinicians close coil coils cold combined concentrated configuration configurations cooling copper corner coupling cryostat defined densities density design designed designing designs development difficulties direct dissipation drawn driven dual eddy edge efficiency either element ends equivalent examples explored field flange flanged flanges folded function furthermore generate generated gradient guided heating hector hybrid induced inductance inner inserting investigated investigation length lengths linear located made magnet magnetization meet merit methodology moreover much mutual network noise occurred ohmic outer patient performance placed position power primary produce produced proportional proposed radial radii radiotherapy radius reduce released required requirements resistance respectively scanners secondary series shape shield shielded shielding shields simplified simulation sinusoidal slot smaller solutions spherical split stainless static steel strength structure subsequent surfaces system systems taken technical temperature terms trans transverse treatment tumor turn unable warm whole