Radiation Damping at Clinical Field Strengths: How to Analyse and Avoid it to enable quantitative MRI with Dedicated Coils

Le résumé fourni par la source

Radiation damping (RD) is, in principial, well understood but commonly unconsidered in MRI. It results from inductive coupling of the spin system and the detection circuit, leading to nonlinearities in the Bloch equations. Previous research established that RD increases with the filling factor and quality factor of the coil and the magnetic field strength. However, little attention has been paid to a quantitative characterization. Moreover, implications for the RF pulse performance must be considered given similar timescales (milliseconds) of RD and pulse length. Our findings indicate that RD can impact typical MRI sequences and, consequently, parameters determined from their application.

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