Figure 1.

(A) Schematic diagram of the navigated 3D‐FID‐MRSI sequence: volumetric navigators (vNavs), iMUSICAL coil combination pre‐scan, water suppression enhanced through T₁ effects (WET), outer‐volume‐suppression (OVS), and the 3D‐FID‐MRSI sequence with concentric‐ring readout (acquisition delay = 0.8 ms, TR = 850 ms). (B) Positioning of the MRSI volume including the placement of OVS slabs below the VOI. (C) Online reconstruction pipeline for our proposed single‐echo navigators and the original double‐echo navigators. The pipelines differ only by how the B₀‐maps are created: for the single‐echo approach, the pre‐calculated phase offsets are subtracted from the single phase images, whereas for the double‐echo approach, B₀‐maps are generated by subtracting the phase images from the 2 TEs