To evaluate. by Magnetic Resonance Imaging. if there is a typical pattern or severity of PRES in transplanted children for hemoglobinopathy. Secondary point was to investigate the pattern and severity of PRES in children with thalassemia-THAL and sickle-cell disease-SCD after autologous hematopoietic stem cell transplantation (aHSCT). https://www.roneverhart.com/Grace-Design-M801-MK2-High-Fidelity-p15168/