Acute kidney injury (AKI) is defined clinically using serum creatinine. We use multiparametric renal MRI to assess longitudinal changes in AKI. Nine participants were assessed at time of AKI, 7 were re-scanned at 3-months and 1-year. At peak AKI, total kidney volume (TKV) and cortex and medulla T1 were elevated, and cortex perfusion reduced compared to HVs. After 3-months, TKV reduced compared to peak AKI, cortex and medulla T1 remained slightly elevated compared to HVs. Perfusion remained reduced compared to HVs after 1-year. MRI showed incomplete recovery at 3 months, despite normalisation of biochemistry, providing potential to identify maladaptive repair.