A 2-in-1 single-element coil design for transcranial magnetic stimulation and magnetic resonance imaging

Hai Lu, Shumin Wang

Research output: Research - peer-reviewArticle

Abstract

Purpose: To demonstrate the feasibility of turning transcranial magnetic stimulation (TMS) coil for MRI signal reception. Methods: A critically coupled network was formed by using a resonated turn of TMS coil as the secondary and a regular radiofrequency (RF) coil as the primary. A third coil was positioned between the two coils for detuning during RF transmission. Bench measurement, numerical simulation, and MRI experiment were performed for validation. Results: The signal-to-noise ratio of the proposed 2-in-1 coil is 35% higher in its field of view, compared with a MRI-only reference coil of the same size, made by the same material, and backed up by an untuned TMS coil, but lower than a RF surface coil of the same size without any TMS coil nearby. Spin-echo images of the human brain further validated its performance. Conclusions: The proposed method can transform TMS coil for MRI signal acquisition with virtually no modifications on the TMS side. It not only enables flexible and close positioning of TMS coil inside MRI scanner, but also improves the signal-to-noise ratio compared with conventional implementations. It can be applied as a building block for developing advanced concurrent TMS/MRI hardware.

LanguageEnglish (US)
JournalMagnetic Resonance in Medicine
DOIs
StateAccepted/In press - 2017

Fingerprint

Transcranial Magnetic Stimulation
Magnetic Resonance Imaging
Signal-To-Noise Ratio
Brain

Keywords

  • RF coil
  • TMS

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

@article{9ba17232b9794a5a9ec3e3a390867777,
title = "A 2-in-1 single-element coil design for transcranial magnetic stimulation and magnetic resonance imaging",
abstract = "Purpose: To demonstrate the feasibility of turning transcranial magnetic stimulation (TMS) coil for MRI signal reception. Methods: A critically coupled network was formed by using a resonated turn of TMS coil as the secondary and a regular radiofrequency (RF) coil as the primary. A third coil was positioned between the two coils for detuning during RF transmission. Bench measurement, numerical simulation, and MRI experiment were performed for validation. Results: The signal-to-noise ratio of the proposed 2-in-1 coil is 35% higher in its field of view, compared with a MRI-only reference coil of the same size, made by the same material, and backed up by an untuned TMS coil, but lower than a RF surface coil of the same size without any TMS coil nearby. Spin-echo images of the human brain further validated its performance. Conclusions: The proposed method can transform TMS coil for MRI signal acquisition with virtually no modifications on the TMS side. It not only enables flexible and close positioning of TMS coil inside MRI scanner, but also improves the signal-to-noise ratio compared with conventional implementations. It can be applied as a building block for developing advanced concurrent TMS/MRI hardware.",
keywords = "RF coil, TMS",
author = "Hai Lu and Shumin Wang",
year = "2017",
doi = "10.1002/mrm.26640",
journal = "Magnetic Resonance in Medicine",
issn = "0740-3194",
publisher = "John Wiley and Sons Inc.",

}

TY - JOUR

T1 - A 2-in-1 single-element coil design for transcranial magnetic stimulation and magnetic resonance imaging

AU - Lu,Hai

AU - Wang,Shumin

PY - 2017

Y1 - 2017

N2 - Purpose: To demonstrate the feasibility of turning transcranial magnetic stimulation (TMS) coil for MRI signal reception. Methods: A critically coupled network was formed by using a resonated turn of TMS coil as the secondary and a regular radiofrequency (RF) coil as the primary. A third coil was positioned between the two coils for detuning during RF transmission. Bench measurement, numerical simulation, and MRI experiment were performed for validation. Results: The signal-to-noise ratio of the proposed 2-in-1 coil is 35% higher in its field of view, compared with a MRI-only reference coil of the same size, made by the same material, and backed up by an untuned TMS coil, but lower than a RF surface coil of the same size without any TMS coil nearby. Spin-echo images of the human brain further validated its performance. Conclusions: The proposed method can transform TMS coil for MRI signal acquisition with virtually no modifications on the TMS side. It not only enables flexible and close positioning of TMS coil inside MRI scanner, but also improves the signal-to-noise ratio compared with conventional implementations. It can be applied as a building block for developing advanced concurrent TMS/MRI hardware.

AB - Purpose: To demonstrate the feasibility of turning transcranial magnetic stimulation (TMS) coil for MRI signal reception. Methods: A critically coupled network was formed by using a resonated turn of TMS coil as the secondary and a regular radiofrequency (RF) coil as the primary. A third coil was positioned between the two coils for detuning during RF transmission. Bench measurement, numerical simulation, and MRI experiment were performed for validation. Results: The signal-to-noise ratio of the proposed 2-in-1 coil is 35% higher in its field of view, compared with a MRI-only reference coil of the same size, made by the same material, and backed up by an untuned TMS coil, but lower than a RF surface coil of the same size without any TMS coil nearby. Spin-echo images of the human brain further validated its performance. Conclusions: The proposed method can transform TMS coil for MRI signal acquisition with virtually no modifications on the TMS side. It not only enables flexible and close positioning of TMS coil inside MRI scanner, but also improves the signal-to-noise ratio compared with conventional implementations. It can be applied as a building block for developing advanced concurrent TMS/MRI hardware.

KW - RF coil

KW - TMS

UR - http://www.scopus.com/inward/record.url?scp=85012894869&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85012894869&partnerID=8YFLogxK

U2 - 10.1002/mrm.26640

DO - 10.1002/mrm.26640

M3 - Article

JO - Magnetic Resonance in Medicine

T2 - Magnetic Resonance in Medicine

JF - Magnetic Resonance in Medicine

SN - 0740-3194

ER -