![]() ![]() Joseph’s Hospital and Medical Center, Phoenix, ArizonaĪcoustic neuromas are common benign lesions that can result in sensorineural hearing loss. Barrow-ASU Center for Preclinical Imagingĭivision of Neuroradiology, Barrow Neurological Institute, St.Department of Translational Neuroscience.Department of ENT and Skull Base Surgery.For Providers & Researchers Show submenu.Parkinson’s Disease & Movement Disorders.Center for Transitional Neuro-Rehabilitation.0.2 mL/kg in adults, children and infants. The recommended dose of gadolinium DTPA injection is 0.1 mmol/kg, i.e. Use T1 tse fat sat small fov axial and coronal scans after the administration of IV gadolinium DTPA injection(copy the planning outlined above). If phase-contrast scanning is not available, dynamic contrast enhanced venography of the skull base should be performed. MRV brain is an important sequence in the MOE protocol as the infection can cause jugular vein and cavernous sinus thrombosis. Slices must be sufficient to cover the whole skull base from right pinna to left pinna. Position the saturation band at the bottom of the block (below C2) in the sagittal and coronal planes to eliminate arterial signals. This angulation reduces the in-plane saturation effects. Check the positioning block in the coronal plane and again angle 10° from the midline. Plan the sagittal 3D phase-contrast block on the axial plane, angling the position block 10° from the midline of the brain. MRV skull base 3D phase-contrast (PC) sagittal Slices must be sufficient to cover the skull base from the antero-superior border of the zygomatic bone to the posterior border of the temporal bone. An appropriate angle must be given in the sagittal plane, perpendicular to the hard palate. Check the positioning block in the other two planes. Plan the coronal slices on the axial plane, angle the position block parallel to the right and left internal auditory meatus. Slices must be sufficient to cover the skull base from the glabella down to the upper lip. ![]() An appropriate angle must be given in the sagittal plane (parallel to hard palate). Plan the axial slices on the coronal plane angle the position block parallel to the right and left internal auditory meatus. Slices must be sufficient to cover the skull base and should extend from the glabella down to the upper lip. An appropriate angle must be given in the sagittal plane, parallel to the hard palate. Plan the axial slices on the coronal plane, angle the position block parallel to the right and left internal auditory meatus. Suggested protocols, parameters and planningĪ three plane localiser must be taken in the beginning to localise and plan the sequences. Give cushions under the legs for extra comfortĬentre the laser beam localiser over the nose tip Position the head in the head and neck coil and immobilize with cushions Offer earplugs or headphones, possibly with music for extra comfort Gadolinium should only be given to the patient if GFR is > 30 relative or staff )Ĭontrast injection risk and benefits must be explained to the patient before the scan If possible provide a chaperone for claustrophobic patients (e.g. Pregnancy (risk vs benefit ratio to be assessed)Ī satisfactory written consent form must be taken from the patient before entering the scanner roomĪsk the patient to remove all metal objects including keys, coins, wallet, cards with magnetic strips, jewellery, hearing aid and hairpins Intracranial aneurysm clips (unless made of titanium) cardiac pacemaker, insulin pump biostimulator, neurostimulator, cochlear implant, and hearing aids) Any electrically, magnetically or mechanically activated implant (e.g. ![]()
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