Rapid Fast Field-Cycling MRI using Keyhole Imaging

In this work we describe a new method of field-cycling relaxometric imaging based on the view-sharing technique known as keyhole imaging. We have employed this technique to generate images containing a new form of endogenous contrast based on the variation of R1 with the external magnetic field. Relaxometric imaging results are presented from a phantom study and a human volunteer in order to demonstrate the accuracy and practicality of the method.

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