Real-time shimming with FID navigators.

FIDnavs facilitate rapid measurement and application of field coefficients for slice-wise B₀ shimming. The proposed approach can successfully counteract spatiotemporal field perturbations and substantially improves <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:semantics> <mml:mrow><mml:msubsup><mml:mi>T</mml:mi> <mml:mn>2</mml:mn> <mml:mo>*</mml:mo></mml:msubsup> </mml:mrow> <mml:annotation>$$ {\mathrm{T}}_2^{\ast } $$</mml:annotation></mml:semantics> </mml:math> -weighted image quality, which is important for a variety of clinical and research applications, particularly at ultra-high field.