New Horizons in Electromagnetics in Medicine and Biology

Ueno, S.

doi:10.1029/2020rs007152

Cited by 4 publications

(3 citation statements)

References 55 publications

(63 reference statements)

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“…Many levels of optimization have permitted improvements in efficiency that have opened up the possibility of more complex pulse excitation protocols, with the capability of adjusting the repetition frequency, waveform, etc. In order to accomplish the required magnetic field of about 2 T [ 74 ], the excitation voltage and current of the coil could reach about 10 kV and 10 kA, respectively. The combination of these large excitation parameters with low coil resistance produces important heating and acoustic noises in the coil system during the session that can have an impact on the therapy outcome [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

Devices and Technology in Transcranial Magnetic Stimulation: A Systematic Review

et al. 2022

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The technology for transcranial magnetic stimulation (TMS) has significantly changed over the years, with important improvements in the signal generators, the coils, the positioning systems, and the software for modeling, optimization, and therapy planning. In this systematic literature review (SLR), the evolution of each component of TMS technology is presented and analyzed to assess the limitations to overcome. This SLR was carried out following the PRISMA 2020 statement. Published articles of TMS were searched for in four databases (Web of Science, PubMed, Scopus, IEEE). Conference papers and other reviews were excluded. Records were filtered using terms about TMS technology with a semi-automatic software; articles that did not present new technology developments were excluded manually. After this screening, 101 records were included, with 19 articles proposing new stimulator designs (18.8%), 46 presenting or adapting coils (45.5%), 18 proposing systems for coil placement (17.8%), and 43 implementing algorithms for coil optimization (42.6%). The articles were blindly classified by the authors to reduce the risk of bias. However, our results could have been influenced by our research interests, which would affect conclusions for applications in psychiatric and neurological diseases. Our analysis indicates that more emphasis should be placed on optimizing the current technology with a special focus on the experimental validation of models. With this review, we expect to establish the base for future TMS technological developments.

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Section: Resultsmentioning

confidence: 99%

Devices and Technology in Transcranial Magnetic Stimulation: A Systematic Review

et al. 2022

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“…Next, a local brain stimulation method using a figure 8-shaped coil was proposed, and stimulation of the human motor cortex within 5 mm resolution was achieved 27 . Implementation of the rTMS using a figure 8-shaped coil is advantageous for local stimulation of the brain and widely used in basic and clinical medicine 28 . Despite the progress of various studies on rTMS and surface and deep brain stimulation according to the structural modification of the figure 8-shaped coil 29 , the two designs showed similar reproducibility based on recent clinical studies 30 .…”

Section: Discussionmentioning

confidence: 99%

Development and application of rTMS device to murine model

Choung

Bhattacharjee

Son

et al. 2023

Sci Rep

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Repetitive transcranial magnetic stimulation (rTMS) is attracting attention as a new treatment technique for brain lesions, and many animal studies showing its effects have been reported. However, the findings of animal application researches cannot directly represent the effects of rTMS in human, mainly due to size difference and mechanistic characteristics of rTMS. Therefore, the authors purposed to develop a mouse rTMS to simulate clinical application and to confirm. Firstly, a virtual head model was created according to magnetic resonance images of murine head. Then, simulations of rTMS stimulation with different coils were performed on the murine head phantom, and an rTMS device for mice was fabricated based on the optimal voltage conditions. Lastly, strengths of magnetic fields generated by the two rTMS devices, for human (conventional clinical use) and mouse (newly fabricated), were measured in air and on mouse head and compared. Resultantly, the magnetic field intensity generated by coil of mouse was lower than human’s (p < 0.01), and no differences were found between the predicted simulation values and the measured intensity in vivo (p > 0.05). Further in vivo researches using miniaturized rTMS devices for murine head should be followed to be more meaningful for human.

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“…This has led to a rapid expansion in the study of functional brain research; studies concerning the functional organization of the human brain, neuronal dynamic connectivity, and neuronal plasticity in the cortex have been successfully conducted using figure-eight coils. In view of its excellent performance in localized brain stimulation, TMS with a figure-eight coil is now widely used in basic and clinical medicine ( Ueno, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Figure-Eight Coils for Magnetic Stimulation: From Focal Stimulation to Deep Stimulation

Ueno

Sekino

2021

Front. Hum. Neurosci.

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This article reviews the evolution and recent developments of transcranial magnetic brain stimulation using figure-eight coils to stimulate localized areas in the human brain. Geometric variations of figure-eight coils and their characteristics are reviewed and discussed for applications in neuroscience and medicine. Recent topics of figure-eight coils, such as focality of figure-eight coils, tradeoff between depth and focality, and approaches for extending depth, are discussed.

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New Horizons in Electromagnetics in Medicine and Biology

Cited by 4 publications

References 55 publications

Devices and Technology in Transcranial Magnetic Stimulation: A Systematic Review

Devices and Technology in Transcranial Magnetic Stimulation: A Systematic Review

Development and application of rTMS device to murine model

Figure-Eight Coils for Magnetic Stimulation: From Focal Stimulation to Deep Stimulation

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