如题,The changes in CSFoscillatory flow at the level of the craniovertebral junction may reflect changesin the compliance of the craniospinal system as a result of surgery. Withphase-contrastMRI, the dynamic assessment of patients before and aftercranioplasty used several parameters during the cardiac cycle for the correlationof blood flow velocity in real time. 另外神经外科``the syndrome of the trephined''怎么翻译?