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Multilayer eccentric 8-shaped coil for deep site transcranial magnetic stimulation

A transcranial magnetic stimulation, figure-8 technology, used in magnetic therapy, therapy, electrotherapy, etc.

Active Publication Date: 2016-05-25
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biconical coil also has the problem of fast attenuation with depth. For example, to achieve an induced electric field strength of 50V / m at 50mm below the coil, the induced electric field at 10mm below the coil is about 500V / m, which will be unbearable of

Method used

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  • Multilayer eccentric 8-shaped coil for deep site transcranial magnetic stimulation
  • Multilayer eccentric 8-shaped coil for deep site transcranial magnetic stimulation
  • Multilayer eccentric 8-shaped coil for deep site transcranial magnetic stimulation

Examples

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] figure 1 It is a structural diagram of a multi-layer eccentric figure-of-eight coil for deep transcranial magnetic stimulation. In the embodiment of the present invention, for the convenience of comparison, the currently used 8-shaped coils are divided in size and defined as coil 1 , coil 2 and coil 3 . Coil 1', coil 2' and coil 3' have the same size as coil 1, coil 2 and coil 3, are symmetrical about the z-axis, and pass a reverse current.

[0024] The size of the wire used in the embodiment is: height × width 3mm × 1.5mm;

[0025] The size of the 8-shaped coil as a comparison: inner radius × outer radius 22.5mm × 45mm, a total of 15 turns;

[0026] This embodiment is a three-layer coil layout. The 8-shaped coil is divided into three coils according to the radius. The consumed wires are the same as the 8-shaped coil. The dimensions o...

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Abstract

The invention discloses a multilayer eccentric 8-shaped coil for deep site transcranial magnetic stimulation. Multiple layers of coils are arranged; the first layer forms a basic 8-shaped coil, the below coils are symmetrically distributed along the central line of the 8-shaped coil, and thus the magnetic field and a sensing electric field are adjusted. The distance between the central line of each coil layer and the symmetrical axis is determined through an optimization method, and the optimization target is to enable the ratio of the sensing electric field E (z0) generated on the surface of the coil to the deep site sensing electric field E (z) to be the minimal. Each coil layer can be arranged on the same plane or can be crossed for a certain angle. When the deep site achieves a threshold potential, the sensing electric field on the surface of the coil can be in a safe range, and good focusing can be achieved in the deep site. The attenuation index of the sensing electric field along the depth direction of the multilayer eccentric 8-shaped coil is close to or even better than that of an H coil.

Description

technical field [0001] The invention belongs to the field of transcranial magnetic stimulation, and in particular relates to a multi-layer eccentric figure-eight coil for deep part transcranial magnetic stimulation. Background technique [0002] Transcranial Magnetic Stimulation (TMS) uses the induced electric field generated by time-varying pulsed electromagnetic fields to act on the central nervous system of the brain, changing the membrane potential of neurons in the cerebral cortex, affecting the metabolism and neuroelectric activity in the brain, thereby causing a series of physiological and biochemical changes. A neurological field treatment of the brain. TMS was first created by British scholars such as Barker in 1985. It has the advantages of no pain, no damage, no X-ray radiation and so on. With the development of computer technology, TMS and repetitive transcranial magnetic stimulation (RepeatedTMS, rTMS) have gained more and more recognition in the fields of cogn...

Claims

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Application Information

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IPC IPC(8): A61N2/04
Inventor 王为民王春忠
Owner PEKING UNIV
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