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Abstract #3811

Investigation of Gradient-Induced Heating of a Cryogen-Free Magnet

Diego Felipe Martinez1, Arjama Halder1,2, Will Bradfield Handler1, and Blaine Alexander Chronik1,2
1The xMR Labs, Physics and Astronomy, Western University, London, ON, Canada, 2Medical Biophysics, Western University, London, ON, Canada

Cryogen-free low-field MR systems can address accessibility issues associated with MRI as they can relax siting requirements and lower operating costs. An important concern in these systems is heating of the magnet during imaging sequences, which could cause field stability issues or quench the magnet. The interaction between the gradient system and the main magnet was investigated using temperature probes. Trapezoidal based pulses were run on components of the gradient at various strengths, showing the x-axis coil as the most impactful on the main magnet. In all experiments, the heating was <0.015 K, with “worst case” heating guiding further study.

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