FIGURE S1 (A) K-space of a diffusion-weighted EPI acquisition as measured by field probes when on the scaffold and when integrated into the coil (for first-, second-, and third-order spherical-harmonic fits to the field-probe data) and (B) their commensurate difference (Δk = kscaffold – kcoil) for a representative subject. (C) Field dynamics measured by probes while on the scaffold, and corrected with a third-order fit, were used as a reference. (D) The difference between these field dynamics and those measured while field probes were integrated into the coil exhibited a systematic deviation when employing a third-order fit: this was most prominent for terms with a strong z-dependency, most likely due to the asymmetry of the gradient coil. These errors were substantially reduced when employing a first- or second-order fit. Integrated field probes were capable of measuring field dynamics for a minimum duration of 40 ms for this subject, which is commensurate with the shortest FID duration (see Figure 8)

FIGURE S2 (A) K-space of a diffusion-weighted, single-shot spiral acquisition as measured by field probes when on the scaffold and when integrated into the coil (for first-, second-, and third-order spherical-harmonic fits to the field-probe data) and (B) their commensurate difference (Δk = kscaffold – kcoil) for a representative subject. (C) Field dynamics measured by probes while on the scaffold, and corrected with a third-order fit, were used as a reference. (D) The difference between these field dynamics and those measured while field probes were integrated into the coil exhibited a systematic deviation when employing a third-order fit: this was most prominent for terms with a strong z-dependency, most likely due to the asymmetry of the gradient coil. These errors were substantially reduced when employing a first- or second-order fit