Fast B1+ mapping with a function fit using a reduced number of support points
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چکیده
Introduction: Parallel transmission techniques in MRI have sparked new interest in measuring the B1+ field, the component of the radiofrequency field concerned with spin excitation. A precise measurement over a large range of B1+ values can be performed by fitting a function to data acquired with different flip angles [1]. However a large number of support points are necessary, making this measurement time-consuming. If the function used for the fit matches the measured data closely the number of support points can be reduced as proposed in this study. The shortened acquisition time allows the application of B1+ mapping with a function fit for routine B1+ measurements.
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تاریخ انتشار 2008