Rosette Cardiac <scp>MR</scp> Fingerprinting for Simultaneous <scp> T ₁ </scp> , <scp> T ₂ </scp> , T2*$$ {\mathrm{T}}_2^{\ast } $$, and Fat Fraction Mapping Using a Multi‐Echo Deep Image Prior Reconstruction

The multi-echo cMRF acquisition coupled with a DIP reconstruction enables the simultaneous quantification of T₁, T₂, <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> , and fat in the heart and demonstrates good agreement with conventional mapping approaches in phantom and in vivo experiments. Additionally, the DIP reconstruction provides accurate measurements with a lower voxel-level variance compared with direct gridding and iterative low-rank reconstruction methods.