Dynamic MRI of cerebrospinaluidow in endoscopic percutaneous ventriculostomy

Endoscopic percutaneous ventriculostomy (EPV) is a new technique to restore theow of the cerebrospinaluid (CSF) to the basal cistern in patients with non-communicating hydrocephalus (NCH). Cardiac gated MRI techniques have been applied to demonstrate normal and abnormal CSFow in humans. The aim of this study was to evaluate the ability of a new multislice spin echo dynamic MRI technique and amplitude and phase reconstruction to demonstrate the impairment of CSFow through the aqueduct preoperatively and to assess the patency of the ventriculostomy after surgery. Thirteen patients with NCH were studied with dynamic MRI before and after EPV using multiple sagittal multislice gated SE acquisitions to demonstrate the CSFow. Nine patients were clinically improved by EPS, two remained unchanged and two deteriorated. The permeability of the ventriculostomy was con® rmed in all patients. We think that MRIow studies are useful to demonstrate the site of impairment of CSFow and its aetiology preoperatively, and to assess the permeability of the ventriculostomy after surgery in a non invasive way.