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Abstract #4041

The design of a low-weight homogenous Halbach helmet for imaging the adult brain.

Thomas O'Reilly1 and Andrew Webb1
1C.J. Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands

Arrays of permanent magnets have shown promise as a relatively light weight, low cost, sustainable way of generating magnetic fields suitable for MRI. In this work we show the design of a new homogenous helmet shaped, Halbach-array based magnet optimized for imaging the adult head. The magnet has a mean magnetic field strength of 59.7 mT and a homogeneity of 1313 ppm over a brain sized 25x20x15 cm3 ellipsoid. By truncating one side of the magnet the weight of the system has been reduced compared to symmetric designs while increasing the obtained field strength.

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