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Neuro-endoscopic third ventriculostomy: evaluation with magnetic resonance imaging
D J Wilcock1, T Jaspan, B S Worthington
1University Department of Radiology, Leicester Royal Infirmary, Department of Radiology, UK.
Abstract:
We have performed a prospective study of the use of magnetic resonance (MR) imaging in 14 patients undergoing neuro-endoscopic third ventriculostomy. MR imaging was undertaken prior to the endoscopy and serial studies were carried out after the procedure. MR imaging provides important information concerning the morphology of the third ventricle and allows the identification of an appropriate puncture site in the floor of the third ventricle. In particular, the relationship of the third ventricular floor to the basilar artery is well demonstrated. Following an endoscopic septostomy, MR imaging allows visualisation of any change in ventricular size. A cerebro-spinal fluid (CSF) flow void in the anterior inferior third ventricle, sometimes extending into the suprasellar cisterns was frequently demonstrated and this was found to be a more constant feature than reduction in ventricular size. MR imaging provides an indispensable tool for both planning and follow-up of endoscopic third ventriculostomy.
Insights
Magnetic resonance (MR) imaging is crucial for planning and monitoring neuro-endoscopic third ventriculostomy. This technique effectively visualizes the third ventricle
Area of Science:
- Neurosurgery
- Neuroradiology
- Medical Imaging
Background:
- Endoscopic third ventriculostomy (ETV) is a neurosurgical procedure to treat hydrocephalus.
- Accurate pre-operative and post-operative imaging is essential for successful ETV outcomes.
- Magnetic resonance (MR) imaging offers detailed anatomical visualization.
Purpose of the Study:
- To evaluate the utility of MR imaging in patients undergoing ETV.
- To assess MR imaging's role in planning, guidance, and follow-up of ETV procedures.
Main Methods:
- Prospective study involving 14 patients undergoing ETV.
- Pre-operative and serial post-operative MR imaging examinations were performed.
- Analysis focused on third ventricular morphology, puncture site identification, and post-procedural changes.
Main Results:
- MR imaging accurately depicted third ventricular anatomy and identified optimal puncture sites.
- The relationship between the third ventricular floor and the basilar artery was clearly visualized.
- Post-ETV, a cerebrospinal fluid (CSF) flow void was a consistent finding, more so than ventricular size reduction.
Conclusions:
- MR imaging is indispensable for both the planning and follow-up phases of ETV.
- It provides critical anatomical information for safe and effective neurosurgical intervention.
- The demonstration of CSF flow void is a valuable post-procedural imaging marker.