title: Virtual MRI endoscopy of the intracranial cerebrospinal fluid spaces.
abstract: We used constructive interference in steady state (CISS) 3D Fourier transform (3DFT) MRI data sets to obtain three-dimensional (3D) virtual MRI endoscopic views of the intracranial cerebrospinal fluid (CSF) spaces, processing them with a commercially available perspective endoscopic algorithm. We investigated the potential of the intracranial virtual MRI endoscopy applied to visualisation of the pathology in 13 patients with surgically confirmed trigeminal neuralgia (3), hemifacial spasm (3), acoustic neuroma (3), suprasellar germinoma (1), Langerhans cell histiocytosis (1), lateral ventricle nodules (1) and pituitary dwarfism (1). All images were acquired using a 1.5-T imager employing a circular polarised head coil. The CISS-3DFT data sets were transferred to a workstation for processing with the perspective endoscopic algorithm. Postprocessing for virtual MRI endoscopy was possible for all data sets. The lesions in 12 patients, and their complex anatomical relationships with the surrounding structures, were well seen on the 3D images. A small acoustic neuroma in the internal auditory meatus was not seen using virtual endoscopy. Although virtual MRI endoscopy has limitations, it provides 3D images which cannot be acquired using any other procedure.
authors.affiliation: Department of Radiology, Kumamoto University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Shigematsu
authors.forename: Y
authors.initials: Y
authors.lastname: Korogi
authors.forename: T
authors.initials: T
authors.lastname: Hirai
authors.forename: T
authors.initials: T
authors.lastname: Okuda
authors.forename: I
authors.initials: I
authors.lastname: Ikushima
authors.forename: T
authors.initials: T
authors.lastname: Sugahara
authors.forename: L
authors.initials: L
authors.lastname: Liang
authors.forename: Y
authors.initials: Y
authors.lastname: Ge
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001921:Brain / Q000473:pathology*; D001927:Brain Diseases / Q000175:diagnosis; D002555:Cerebrospinal Fluid; D002648:Child; D002675:Child, Preschool; D003389:Cranial Nerve Diseases / Q000175:diagnosis; D003391:Cranial Nerves / Q000473:pathology*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged