Three-sided magnets for magnetic resonance imaging

Bertora, F.; Fabbricatore, P.; Viale, A.; Borceto, Alice

doi:10.1063/1.3537950

Cited by 2 publications

(1 citation statement)

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“…− The ratio of average current density in the two main sections of the magnet: the rectangular coil (A), and the "C" (B). The interaction among these factors can be explored by means of brute force heuristic search [48]. Alternatively, it can be played in a more effective way that exploits the linearity of the problem [49].…”

Section: An Optimized 3-d Designmentioning

confidence: 99%

Quest for an open MRI scanner

Bertora

Borceto

Viale

et al. 2014

Bio-Medical Materials and Engineering

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A study of the motor cortex during the programming, execution and mental representation of voluntary movement is of great relevance; its evaluation in conditions close to reality is necessary, given the close integration of the visuomotor, sensory feedback and proprioceptive systems, as of yet, a functional Magnetic Resonance Imaging (fMRI) scanner allowing a human subject to maintain erect stance, observe the surroundings and conserve limb freedom is still a dream. The need for high field suggests a solenoid magnet geometry that forces an unnatural posture that affects the results, particularly when the motor cortex is investigated. In contrast in a motor functional study, the scanner should allow the subject to sit or stand, with unobstructed sight and unimpeded movement. Two approaches are presented here to solve this problem. In the first approach, an increased field intensity in an open magnet is obtained lining the "back wall" of the cavity with a sheet of current: this boosts the field intensity at the cost of the introduction of a gradient, which has to be canceled by the introduction of an opposite gradient; The second approach is an adaptation of the "double doughnut" architecture, in which the cavity widens at the center to provide additional room for the subject. The detailed design of this kind of structure has proven the feasibility of the solution.

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Section: An Optimized 3-d Designmentioning

confidence: 99%