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Sample ASL maps of a patient with a posterior fossa pilocytic astrocytoma on a midthalamic axial section. A, Single-PLD CBF maps at preoperative, postoperative, and follow-up time points. Color bar indicates milliliters/100g/min. B, Raw multi-TI ASL data show a difference in magnetization (dM) between control and label scans at selected sequentially increasing TIs at a follow-up scan. Color bar indicates arbitrary units of dM.
