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B70 figure of eight coil

Manufactured by MagVenture
Sourced in Denmark

The B70 figure-of-eight coil is a magnetic stimulation coil designed for use in clinical and research applications. It is a circular coil with two windings arranged in a figure-of-eight configuration. The coil is capable of generating a focused magnetic field that can be used to stimulate targeted areas of the brain or other tissues.

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2 protocols using b70 figure of eight coil

1

Targeted rTMS for Pain Relief

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Stimulation was performed using a MagPro stimulator [MagVenture (distr. Mag2Health), Farum, Denmark] and either a flat B65 coil (MagVenture) in patients with upper limb pain or an angled B70 figure-of-eight coil (MagVenture) in patients with lower limb. Compared to flat figure-of-eight coils, the B70 coil is more powerful, leading to lower the resting motor threshold by 10–33%22 (link) and stimulates deeper the motor cortex corresponding to lower limbs due to its angle of 150°.23 (link)The motor cortical representation of the painful region was targeted using a TMS Navigator system, integrating individual brain MRI data (Localite, Sankt Augustin, Germany). Stimulation was performed at 10 Hz with an intensity set at 80% of the rest motor threshold (previously determined with motor evoked potential recording) and the coil held in posteroanterior orientation. Each rTMS session consisted of 40 trains of 5-s duration with inter-train interval of 25 s for a total of 2000 pulses in 20 min. This protocol is in line with the expert recommendations for safety.24 (link),25 (link)
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2

MRI-guided iTBS and rTMS Protocol

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iTBS-treatment localization was magnetic resonance imaging (MRI) based, and rTMS was applied with a MagPro X100 system (MagVenture) equipped with a B70 figure-of-eight coil (study 1A) and a double-sided Cool-B65 A/P coil (study 1B).
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