Use of 3DFT-CISS Sequences and Virtual MR Endoscopy for the Neuroendoscopic Treatment of Unilateral Hydrocephalus: Case Illustration

Abstract

Objective: Intraventricular virtual MR endoscopic imaging of the foramen of Monro region by using three-dimensional Fourier transformation constructive interference in steady state (3DFT-CISS) magnetic resonance imaging in a patient with a unilateral congenital obstruction of the foramen of Monro by a transparent membranous septum was performed to enhance the orientation, achieve a better understanding of the pathology, and plan the surgical intervention in an endoscopic approach to the lateral ventricles.

Methods: 3DFT-CISS sequences and virtual MR endoscopic imaging were performed in a patient before and after endoscopic fenestration procedures, to communicate the lateral ventricle to the third ventricle for the treatment of unilateral ventricular enlargement.

Results: Preoperative 3DFT-CISS imaging demonstrated unilateral membranous septa in the localization of the left foramen of Monro which were not observed with routine T₂-weighted imaging. 3DFT-CISS imaging and T₂-weighted imaging were equally useful for monitoring postoperative changes in the size of the ventricles or cysts and the presence of flow voids after fenestration procedures, but only 3DFT-CISS imaging clearly demonstrated the area of fenestration.

Conclusion: Virtual MR endoscopy by using 3DFT-CISS sequences is a feasible method in the planning of intraventricular real-time endoscopic surgery, for the enhancement of orientation in a surgical field, and to achieve a better understanding of the pathology.

Key words

virtual MR endoscopy - septum of the foramen of Monro - magnetic resonance imaging - neuroendoscopy

References

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