Sensitivity Improvement of Magnetic Nanoparticle Imaging by Compensation With Digital-to-Analog Converter

Sasayama, Teruyoshi; Okamura, Naoki; Yonetani, Takashi

doi:10.1109/tmag.2020.3014375

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…The position of the MNPs able to respond to the field of excitation will be determined by this coil. [79,80] Following that, the MNPs will be excited by a magnetic field created by the excitation coil or driving coil. To activate the MNPs, the excitation coil should create a strong and uniform magnetic field.…”

Section: Configuration Of Coilsmentioning

confidence: 99%

A comprehensive review on magnetic imaging techniques for biomedical applications

Mukhatov

Pham

et al. 2023

Nano Select

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This article presents a comprehensive review of current Magnetic Imaging Techniques (MIT), specifically Magnetic Particle Imaging (MPI) and Magnetic Resonance Imaging (MRI) methods as well as their impacts and potential in biomedical applications.The paper particularly focuses on several perspectives of MPI and MRI techniques including technical considerations, advantages, limitations, applications, future trends. Surprisingly, there are not many review articles that focused on MPI and MRI. This review will give a complete overview of present technology, perspectives, and potential future developments for MPI and MRI. MIT has become an essential and integral part of medical diagnosis in many large medical clinics and hospitals. This area is rapidly developing and evolving to meet the huge demands in medical diagnosis and prevention. MPI and MRI are promising technologies that provide reliable and effective diagnosis for many diseases including cancer. MIT uses non-invasive scanning to obtain a detailed image of the body's tissues or organs without the necessity for surgery. These techniques allow us to detect symptoms of serious diseases at an early stage. Early detection also gives patients the chance to get the right care before their illnesses advance to a late, incurable stage, potentially saving many lives.

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Section: Configuration Of Coilsmentioning

confidence: 99%

A comprehensive review on magnetic imaging techniques for biomedical applications

Mukhatov

Pham

et al. 2023

Nano Select

View full text Add to dashboard Cite

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Improvement in magnetic nanoparticle tomography estimation accuracy by combining sLORETA and non-negative least squares methods

Sasayama

Okamura

Higashino

et al. 2022

Journal of Magnetism and Magnetic Materials

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Application of square-wave inverter in excitation system for magnetic nanoparticle tomography

et al. 2022

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To collect the signals of magnetic nanoparticles (MNPs) at a distance from a magnetic nanoparticle tomography, a strong ac magnetic field should be generated by applying a high current to the excitation coil. To this end, sinusoidal excitation using a linear amplifier-type ac power source has been applied to the tomography. Although this source can provide a high-quality sinusoidal voltage, its low power efficiency is not suitable for generating the required high current. To overcome this limitation, we use an H-bridge voltage source inverter to achieve high efficiency by generating a square-wave voltage. However, the third harmonic component in the square wave, undermines the acquisition of MNP signals. Thus, we suppress the third harmonic by shifting the switching phase of the inverter transistors. As a result, the third harmonic in the excitation current is reduced to less than one-tenth of that obtained after conventional suppression. We verify the distribution of MNP signals at depths up to 50 mm using the proposed excitation approach. The results demonstrate the effectiveness of the proposed approach based on square-wave inverter excitation for magnetic nanoparticle tomography.

show abstract

Sensitivity Improvement of Magnetic Nanoparticle Imaging by Compensation With Digital-to-Analog Converter

Cited by 7 publications

References 12 publications

A comprehensive review on magnetic imaging techniques for biomedical applications

A comprehensive review on magnetic imaging techniques for biomedical applications

Improvement in magnetic nanoparticle tomography estimation accuracy by combining sLORETA and non-negative least squares methods

Application of square-wave inverter in excitation system for magnetic nanoparticle tomography

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