This dataset contains 833 brain MRI images (T1w and T2w) from infancy and early childhood. The age of the subjects is between 0 months and 36 months. It contains a wide range of pathologies as well as healthy subjects. It is a quite diverse dataset acquired in the clinical routine over several years (images acquired with same scanner, but different protocols). The T1w images are resampled to the shape of the T2w images. Then both are skull stripped. All details about this dataset can be found in the paper "MyelinAge: Automated Estimation of Myelin Maturation on Brain MRI in Infancy and Early Childhood" (currently under review and link will be added). If you use this dataset please cite the paper. The metadata can be found in the table meta.csv. Description of columns: myelinisation: myelin maturation status in terms of delayed, normal or accelerated according to evaluation by an expert radiologist. For more detail please see the paper. age: the chronological age (in months) since birth. age_corrected: the corrected chronological age (in months), which corrected for the premature babies by the number of month the baby was born before 37 weeks of gestation (in month), hence a preterm newborn gets a negative age. doctor_predicted_age: the predicted age (in months) of the myelin maturation by expert radiologist (subjects with delayed myelin maturation will get lower values than their chronological age). diagnosis: list of pathologies found in this dataset according to expert radiology reports.