... measures. However, the accuracy of any patient-specific DBS model depends heavily upon accurate localization of the DBS electrodes within the anatomy, which is typically defined via co-registration of clinical CT and MRI datasets. Several different approaches exist for this challenging registration problem...

... ipsilateral Meckel’s cave may have produced symptoms consistent with TN. Imaging with fine cuts through Meckel’s cave is an important diagnostic tool. Trigeminal neuralgia Meckel’s cave Microvascular decompression Gasserian ganglion MRI [email protected] 28 12 2018 8 08 2019...

...Ashwin A. Kamath; Daniel D. Friedman; Carl D. Hacker; Matthew D. Smyth; David D. Limbrick Jr.; Albert H. Kim; Ammar H. Hawasli; Eric C. Leuthardt Background: Managing difficult-to-access lesions or surgically accessible lesions in fragile patients is a central problem in neurosurgery. MRI-guided...

...Ruben Geevarghese; Ruth O'Gorman Tuura; Daniel E. Lumsden; Michael Samuel; Keyoumars Ashkan Background: Postoperative imaging is essential for verifying electrode location in patients undergoing deep brain stimulation (DBS). MRI offers better visualisation of brain targets, but concerns about...

...Dieter Sauner; Matthias Runge; Jörg Poggenborg; Mohammad Maarouf; Volker Sturm; Harald Treuer; Stefan Hunsche Objective: In cross-sectional imaging, like CT or MRI, electrodes for deep brain stimulation are visualized by an artifact, which can differ from the real physical size of the electrode...

... peak proton beam irradiation involving the right hippocampus. Single doses of 30 CGE, 50 CGE, 70 CGE, 90 CGE were delivered to groups of 3 animals using single fraction technique. Animals were imaged using a standard 3 T GE Signa MRI at 4 months following treatment. An untreated animal was also studied...

...- and 30-CGE doses. Animals were imaged using a standard 1.5-tesla GE Signa MRI. A 3-inch surface coil was employed to obtain T 1 -weighted sagittal images (TR 600 and TE 30) and dual echo T 2 -weighted coronal images (TR 3,000 and TE 30/90). Animals were imaged at 1.5, 3, 4.5, 6 and 9 months. Volumetric...

...Hooman Azmi; Michael Schulder Recently, magnetic resonance imagers (MRIs) with 3-tesla magnets were approved for clinical use. The spatial accuracy of these high-resolution scanners has yet to be proven. In the present study, a computed tomography (CT)- and MRI-compatible phantom was scanned...

...Todd W. Vitaz; Stephen G. Hushek; Christopher B. Shields; Thomas M. Moriarty Introduction: We prospectively reviewed our experience with intraoperative MRI (iMRI)-guided stereotactic procedures in pediatric patients. Methods: All procedures were performed within the magnet bore of the General...

... the last 30 years has been CT-guided PCC. The goal of this study was to demonstrate the feasibility of an MRI-guided frameless technique in high cervical cordotomy. Methods: We describe 6 patients with intractable pain treated using a frameless, MRI-guided, stereotactic, PCC technique in combination...

... (clustered vs. diffusely scattered). This model was scanned by MRI and CT (1-mm slices). Registration was performed using different numbers and attachment patterns of the fiducials. Using CT or MRI, the localization error was measured in image space as the Euclidean distance between targets defined in image...

...Hidehiro Hirabayashi; Marwan I. Hariz; Markku Fagerlund The coordinates of one and the same target were compared between stereotactic CT and MRI studies, using the original Laitinen noninvasive Stereoadapter, and a slightly modified stereoadapter in 34 patients scheduled for pallidotomy...

...Jae Y. Lim; Antonio A.F. De Salles We analyzed 10 radiofrequency (RF) lesions over time in 9 patients who had follow-up MRI 1 h to 43 weeks following stereotactic pallidotomies performed for medically intractable idiopathic Parkinson''s disease. Pallidotomies were performed under MRI guidance...

...Kyo-Ho Lee The author has performed 108 stereotactic thalamotomies using MRI (MGSTs) without ventriculography in 77 cerebral palsy (CP) patients with dyskinesia(s) from January 1992 to January 1997. The clinical results were verified in terms of improvement of major preoperative symptom and patient...

...George Mandybur; John Morenski; Sandra Kuniyoshi; Robert P. Iacono The true accuracy of MRI scanners utilized for target acquisition in functional stereotaxis remains undefined. We have performed pallidotomies at the Loma Linda University Medical Center using both MRI and MRI concomitant...

... acquisition MRI of 20 patients. Imaging data were resized, reformatted, and manually segmented for the above structures, and mean values and standard deviations for their medial, superior, lateral, and inferior limits determined. Findings demonstrate that the globus pallidus can be consistently and reliably...

...Tohru Hoshida; Sumio Uematsu; Ronald P. Lesser Volume measurement of the amygdalohippocampus on MRI may provide important information for epilepsy surgery. This study investigated the reliability of direct volume assessment (DVA) versus computer-assisted measurement (CAM) of amygdalohippocampus...

...Patrick Herregodts; Tadeusz Stadnik; Jean D'Haens Open skull surgery of deeply located intracerebral lesions requires precise determination of the treatment area in 3-dimensional (3-D) space. 3-D MRI can give important additional information in presurgical determination of the surgical approach...

... emphasizes that stereotactic mesencephalotomy, if performed meticulously and precisely, is a safe surgical procedure for pain relief. Results of MRI and sensory manifestations of a patient 11 years after RMR are also presented. 18 9 1992 © 1992 S. Karger AG, Basel 1992 Copyright / Drug Dosage...

... Pain MRI ...