Currently, the majority of clinical MRI systems operate at moderate field strengths of 1.5 Tesla and 3 Tesla. For small animal imaging, resolutions need to be significantly increased in order to visualize similar structures as in humans.
Ultra High Field (UHF) MRI directly addresses the sensitivity issue of lower magnetic fields since the sensitivity increases with the magnetic field strength. In preclinical MRI, cryogenically-cooled MRI CryoProbes, provide an additional sensitivity boost and have found widespread use. Thus, for example, ultra high resolution in vivo mouse brain data can be easily acquired on a preclinical 15.2 Tesla equipped with a MRI CryoProbe.
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