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Serial 124I-omburtamab images in patient with metastatic neuroblastoma with leptomeningeal disease: anterior maximum-intensity projections (A), sagittal PET projections (B), and fused images (C) from D0, D1, and D2 show activity within ventricles and CSF canal that decreases over time. Systemic activity is seen in liver and bladder in D1 and D2. Clearance from ventricles is slower (long arrows). Pooling is also seen along cauda equina (short arrow).
