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FIG 1. Cervical syringomyelia. Axial slice, preoperative velocity imaging (patient 11).
Six images are obtained 30, 100, 150, 200, 300, and 400 ms after the R-wave. Craniocaudal velocities are represented in red and caudocranial velocites in blue. A pulsatile flow is observed as well in the cyst as in the PCSS.
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