منابع مشابه
A Prepolarized MRI Knee Scanner
T. Grafendorfer, N. I. Matter, R. D. Venook, S. E. Ungersma, G. E. Gold, N. J. Giori, B. A. Hargreaves, J. M. Pauly, A. Macovski, G. C. Scott, and S. M. Conolly GE Global Health, CA, Electrical Engineering, Stanford University, CA, Stanford University, CA, Radiology, Stanford University, CA, Orthopedic Surgery, Stanford University, CA, Bioengineering, UC Berkeley, Berkeley, CA, United States, E...
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In this paper an approach of ferromagnetic shimming for permanent MRI magnet is presented. It is designed to reduce unhomogeneity of magnetostatic field of permanent magnet to meet the stringent requirement for MRI applications. An optimal configuration of ferromagnetic pieces is generated through calculation according to the initial field map and the demanded final homogeneity specifications. ...
متن کاملVisual stimulus presentation using fiber optics in the MRI scanner.
Imaging the neural basis of visuomotor actions using fMRI is a topic of increasing interest in the field of cognitive neuroscience. One challenge is to present realistic three-dimensional (3-D) stimuli in the subject's peripersonal space inside the MRI scanner. The stimulus generating apparatus must be compatible with strong magnetic fields and must not interfere with image acquisition. Virtual...
متن کاملThe impact of MRI scanner environment on perceptual decision-making.
Despite the widespread use of functional magnetic resonance imaging (fMRI), few studies have addressed scanner effects on performance. The studies that have examined this question show a wide variety of results. In this article we report analyses of three experiments in which participants performed a perceptual decision-making task both in a traditional setting as well as inside an MRI scanner....
متن کاملTowards localization of transcranial magnetic stimulation inside the MRI scanner
Background and Motivations: Transcranial magnetic stimulation (TMS) has been used as a non-invasive tool in various neuroscience applications including investigating brain functions, serving as a clinical diagnostic tool and as a therapy for several neuropsychiatric disorders [1]. TMS delivers time-pulse magnetic fields created by special coils to induce local currents in the tissue i.e., neuro...
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ژورنال
عنوان ژورنال: Anaesthesia
سال: 1999
ISSN: 0003-2409
DOI: 10.1046/j.1365-2044.1999.907vv.x