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. 2023 Jan 30;36(2):175–189. doi: 10.1007/s10334-023-01063-5

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Fig. 2 — Field stability measured at 11.7 T (in ppm) with a Skope field camera for 50 h. A 1-h diffusion sequence was run before the start of the measurement. The sudden drops visible on the plot correspond to the discharge of the External Interference Shield (described in the next section)