Abstract #0313

Field-Cycling imaging identifies ischaemic stroke at magnetic field strength below 200 mT

Vasiliki Mallikourti¹, James Ross¹, Oliver Maier², Markus Bödenler³, Rudolf Stollberger ⁴, Lionel Broche¹, and Mary-Joan MacLeod⁵

¹Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, United Kingdom, ²Institute of Medical Engineering, Graz University of Technology, Graz, Austria, ³Institute of eHealth, University of Applied Sciences FH JOANNEUM, Graz, Austria, ⁴BioTechMed-Graz, Graz, Austria, ⁵Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom

Synopsis

Field-Cycling imaging (FCI) is a new imaging technique able to image over a range of low magnetic field levels by rapid switching, to explore the variations in T1 relaxation time as a function of the magnetic field strength, known as T1 dispersion. Here we measured the T1 dispersion contrast from patients with ischaemic stroke. The infarct region in T1 maps corresponded to clinical images. T1 dispersions had different profiles between stroke areas and healthy brain areas, showing that ischaemic strokes can be imaged below 200 mT without contrast agents.

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