Engineering Design of a Special Purpose Functional Magnetic Resonance Scanner Magnet

Borceto, Alice; Damiani, D.; Viale, A.; Bertora, F.; Marabotto, R.

doi:10.1109/tasc.2012.2234811

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…The characteristics are shown in detail in Table 2, while Figure 6 shows the extent of the uniform field region and the stray field; the first covers the prescribed 25 cm diameter sphere with a homogeneity of the same order as that could be obtained by normal manufacturing practices in a room-temperature cavity measuring 80 cm at its narrowest point, the second is comparable to that of a conventional shielded magnet. The details of the magnetic design, covering engineering and constructional details, are presented in [58], and are depicted in Figure 7. The subject field of view is unrestricted in the vertical direction and is limited to 72 degrees, which decreases to 20 beyond 1 m. In practice, however, the presence of the receiving coil and the necessary fixation means will make it necessary to resort to virtual reality display devices, on the other side, the all-important goal of unimpeded limb movements will be reached.…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

Quest for an open MRI scanner

Bertora

Borceto

Viale

et al. 2014

Bio-Medical Materials and Engineering

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“…The diameter and height of magnet coil in meters are 2.4 and 2.0 repsectively. These dimensions are suitable for 2.0 T magnet scheme [27] and open MRI set up of 1.0 T. The magnet scheme is between two open systems for 1.5 T with exterior diameter bigger than 1.2 T and lesser than 2.0 T system [16,27] The mesh structure of the magnet-space: (a) the rectangular mesh for a full magnet model (b) a quarter of the full mesh model [19].…”

Section: Figure 3 Magnet Design Linear Optimization: (A) Meshed Magne...mentioning

confidence: 99%

“…scheme[27] and open MRI set up of 1.0 T. The magnet scheme is between two open systems for 1.5 T with exterior diameter bigger than 1.2 T and lesser than 2.0 T system[16,27]. As compared to 0.7 T open MRI design, the open bore has larger spacing of 0.72 m and diameter of 1.5 m[21].…”

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confidence: 99%

Superconductors for Medical Applications

Ali

2022

Superconductors

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Superconductivity plays a vital role in advanced medical diagnostic as well as in treatment of cancer. Smaller sized superconducting cyclotrons are developing as efficient techniques with carbon ions and protons for external beam therapy. This equipment further gives benefits of less cost and due to smaller size it is far easier to handle. Nowadays, superconductivity has been used commercially in numerous applications in medical sciences including low-temperature superconducting (LTS) materials and high field magnets in magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), magnetic gene transfer, magnetic drug delivery system and cancer and internal hemorrhages detection. Almost all commercial medical systems based on superconductivity use LTS and the majority uses NbTi wires or superconducting quantum interference device (SQUID) made of LTS material.

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Electromagnetic design of a 1.5T open MRI superconducting magnet

Wang

et al. 2020

Physica C: Superconductivity and its Applications

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Engineering Design of a Special Purpose Functional Magnetic Resonance Scanner Magnet

Cited by 5 publications

References 12 publications

Quest for an open MRI scanner

Quest for an open MRI scanner

Superconductors for Medical Applications

Electromagnetic design of a 1.5T open MRI superconducting magnet

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