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
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Correspondence
Prof. K. AydinMD
Department of Neurosurgery
Ondokuzmayıs University
Medical Faculty
55139 Samsun
Turkey
Telefon: +90/362/3121 91 9/3652 int.
Fax: +90/362/457 60 41
eMail: kaydin@omu.edu.tr