In vivo imaging, spleen volume, cardiac function and relaxometry were performed as described in L. Jackson et al.23 (link), at 30 weeks of age using a 9.4T MR system (Agilent Technologies, Santa Clara, USA) equipped with 1000 mT/m gradient inserts and a 39mm volume resonator RF coil (RAPID Biomedical, Rimpar, Germany). A small animal physiological monitoring system (SA Instruments, Stony Brook, NY) was used to record the ECG trace, respiration rate, and internal temperature. Animals were anaesthetized with a mixture of isoflurane and oxygen with physiological measurements used to maintain the depth of anaesthesia23 (link).
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