scholarly journals Usefulness of Multimodal Examination and Intraoperative Magnetic Resonance Imaging System in Glioma Surgery

2012 ◽  
Vol 52 (8) ◽  
pp. 553-557 ◽  
Author(s):  
Kaori SAKURADA ◽  
Kenichiro MATSUDA ◽  
Hayato FUNIU ◽  
Atsushi KUGE ◽  
Sunao TAKEMURA ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Magnetic Resonance Imaging System ◽  
Resonance Imaging ◽  
Glioma Surgery ◽  
Intraoperative Magnetic Resonance Imaging

PoleStar N-10 Low-field Compact Intraoperative Magnetic Resonance Imaging System with Mobile Radiofrequency Shielding

Neurosurgery ◽  
2003 ◽  
Vol 53 (4) ◽  
pp. 1001-1007 ◽  
Author(s):  
Marc Levivier ◽  
David Wikler ◽  
Olivier De Witte ◽  
Arlette Van de Steene ◽  
Danielle Balériaux ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Magnetic Resonance Imaging System ◽  
Resonance Imaging ◽  
Intraoperative Magnetic Resonance Imaging ◽  
Low Field

FEASIBILITY OF POLESTAR N20, AN ULTRA-LOW-FIELD INTRAOPERATIVE MAGNETIC RESONANCE IMAGING SYSTEM IN RESECTION CONTROL OF PITUITARY MACROADENOMAS

Neurosurgery ◽  
2008 ◽  
Vol 63 (2) ◽  
pp. 272-285 ◽  
Author(s):  
Ruediger Gerlach ◽  
Richard du Mesnil de Rochemont ◽  
Thomas Gasser ◽  
Gerhard Marquardt ◽  
Juergen Reusch ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Magnetic Resonance Imaging System ◽  
Resonance Imaging ◽  
Intraoperative Magnetic Resonance Imaging ◽  
Resection Control ◽  
Low Field ◽  
Pituitary Macroadenomas

A Moveable 3-Tesla Intraoperative Magnetic Resonance Imaging System

2011 ◽  
Vol 68 (suppl_1) ◽  
pp. ons168-ons179 ◽  
Author(s):  
Michael J. Lang ◽  
John J. Kelly ◽  
Garnette R. Sutherland
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Image Quality ◽  
Imaging System ◽  
Intraoperative Imaging ◽  
Magnetic Resonance Imaging System ◽  
Operating Table ◽  
Resonance Imaging ◽  
Intraoperative Magnetic Resonance Imaging ◽  
Number Of Patients

Abstract BACKGROUND: Based on success with a prototype 1.5T intraoperative magnetic resonance imaging (iMRI) system and the desire for increased signal-to-noise ratio, along with its relationship to image quality and advanced applications, a 3.0T system that uses the same novel moveable magnet configuration was developed. OBJECTIVE: To assess clinical applicability by prospectively applying the higher-field system to a neurosurgical cohort. METHODS: Upgrading to 3.0T required substantial modification of an existing iMRI-equipped operating room. The 1.5T magnet was replaced with a ceiling-mounted, moveable 3.0T magnet with a 70-cm working aperture. Local radiofrequency shielding was replaced with whole-room shielding. A new hydraulic operating table, high-performance gradients, and advanced image processing software were also installed. The new system was used as an adjunct to standard neurosurgical practice. RESULTS: The iMRI system upgrade required 6 months. Since completion, the 3.0T iMRI system has successfully guided neurosurgery in 120 patients without system failure in a patient-focused environment. Intraoperative image quality was superior to that obtained at 1.5T and enabled intraoperative acquisition of advanced imaging sequences, including tractography. Intraoperative imaging was found to modify surgery in a substantial number of patients. CONCLUSION: Implementation of an iMRI system based on a moveable 3.0T magnet is feasible. From clinical experience with 120 patients, iMRI at 3.0T is safe, reliable, and capable of directing image-guided surgery with exceptional image quality.

5377679 Magnetic resonance imaging system

1995 ◽  
Vol 13 (6) ◽  
pp. VI-VII
Author(s):  
Machida Yoshio ◽  
Hatanaka Masahiko ◽  
Kitane Shinichi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Magnetic Resonance Imaging System ◽  
Resonance Imaging

Pontine ataxic hemiparesis studied by a high-resolution magnetic resonance imaging system

1987 ◽  
Vol 21 (2) ◽  
pp. 204-207 ◽  
Author(s):  
Hidehiko Nabatame ◽  
Hidenao Fukuyama ◽  
Ichiro Akiguchi ◽  
Masakuni Kameyama ◽  
Kazumasa Nishimura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Imaging System ◽  
Magnetic Resonance Imaging System ◽  
Resonance Imaging ◽  
Ataxic Hemiparesis

scholarly journals Numerical Analysis of a Flexible Dual Loop Coil and its Experimental Validation for pre-Clinical Magnetic Resonance Imaging of Rodents at 7 T

2016 ◽  
Vol 16 (6) ◽  
pp. 294-299 ◽  
Author(s):  
S. Solis-Najera ◽  
F. Vazquez ◽  
R. Hernandez ◽  
O. Marrufo ◽  
A.O. Rodriguez
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Ex Vivo ◽  
Small Animal ◽  
Magnetic Resonance Imaging System ◽  
External Diameter ◽  
Rf Coil ◽  
Resonance Imaging ◽  
Clinical Magnetic Resonance Imaging

Abstract A surface radio frequency coil was developed for small animal image acquisition in a pre-clinical magnetic resonance imaging system at 7 T. A flexible coil composed of two circular loops was developed to closely cover the object to be imaged. Electromagnetic numerical simulations were performed to evaluate its performance before the coil construction. An analytical expression of the mutual inductance for the two circular loops as a function of the separation between them was derived and used to validate the simulations. The RF coil is composed of two circular loops with a 5 cm external diameter and was tuned to 300 MHz and 50 Ohms matched. The angle between the loops was varied and the Q factor was obtained from the S11 simulations for each angle. B1 homogeneity was also evaluated using the electromagnetic simulations. The coil prototype was designed and built considering the numerical simulation results. To show the feasibility of the coil and its performance, saline-solution phantom images were acquired. A correlation of the simulations and imaging experimental results was conducted showing a concordance of 0.88 for the B1 field. The best coil performance was obtained at the 90° aperture angle. A more realistic phantom was also built using a formaldehyde-fixed rat phantom for ex vivo imaging experiments. All images showed a good image quality revealing clearly defined anatomical details of an ex vivo rat.

3.0-T Intraoperative Magnetic Resonance Imaging-Guided Resection in Cerebral Glioma Surgery: Interim Analysis of a Prospective, Randomized, Triple-Blind, Parallel-Controlled Trial

Neurosurgery ◽  
2014 ◽  
Vol 61 (CN_suppl_1) ◽  
pp. 145-154 ◽  
Author(s):  
Jin-Song Wu ◽  
Xiu Gong ◽  
Yan-Yan Song ◽  
Dong-Xiao Zhuang ◽  
Cheng-Jun Yao ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Interim Analysis ◽  
Controlled Trial ◽  
Cerebral Glioma ◽  
Resonance Imaging ◽  
Glioma Surgery ◽  
Intraoperative Magnetic Resonance Imaging ◽  
3.0 T
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