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Hippocampal-sparing whole brain radiation in a patient with brain metastases. The right and left hippocampi are contoured in blue and pink, respectively. The top and bottom panel shows the planning magnetic resonance imaging and computed tomography scans, respectively. The red, orange, yellow, and green dose-based shading depict the 33 Gy, 30 Gy, 27 Gy, and 16 Gy isodose lines, respectively.
