A pulsed magnetomotive ultrasound imaging system for magnetic nanoparticle detection

Mazon, E E; Arsalani, Soudabeh; Uliana, João H.; Carneiro, Antônio Adilton Oliveira; Gualdi, A. J.; Pavan, Theo Z.

doi:10.1109/laus53676.2021.9639204

Cited by 2 publications

(7 citation statements)

References 10 publications

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“…After charging the capacitor, an electronic switching device and the coil generated the magnetic field pulse. For further information about the MMUS setup, please refer to Mazon et al [ 44 ]. A multichannel ultrasound pulse/echo system (Sonix RP + Sonix DAQ, Ultrasonix) was then used to track the induced displacement of the internal structure (in the order of micrometers) by a cross-correlation method [ 45 ].…”

Section: Methodsmentioning

confidence: 99%

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Hybrid Nanoparticles of Citrate-Coated Manganese Ferrite and Gold Nanorods in Magneto-Optical Imaging and Thermal Therapy

et al. 2023

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The development of nanomaterials has drawn considerable attention in nanomedicine to advance cancer diagnosis and treatment over the last decades. Gold nanorods (GNRs) and magnetic nanoparticles (MNPs) have been known as commonly used nanostructures in biomedical applications due to their attractive optical properties and superparamagnetic (SP) behaviors, respectively. In this study, we proposed a simple combination of plasmonic and SP properties into hybrid NPs of citrate-coated manganese ferrite (Ci-MnFe2O4) and cetyltrimethylammonium-bromide-coated GNRs (CTAB-GNRs). In this regard, two different samples were prepared: the first was composed of Ci-MnFe2O4 (0.4 wt%), and the second contained hybrid NPs of Ci-MnFe2O4 (0.4 wt%) and CTAB-GNRs (0.04 wt%). Characterization measurements such as UV-Visible spectroscopy and transmission electron microscopy (TEM) revealed electrostatic interactions caused by the opposing surface charges of hybrid NPs, which resulted in the formation of small nanoclusters. The performance of the two samples was investigated using magneto-motive ultrasound imaging (MMUS). The sample containing Ci-MnFe2O4_CTAB-GNRs demonstrated a displacement nearly two-fold greater than just using Ci-MnFe2O4; therefore, enhancing MMUS image contrast. Furthermore, the preliminary potential of these hybrid NPs was also examined in magnetic hyperthermia (MH) and photoacoustic imaging (PAI) modalities. Lastly, these hybrid NPs demonstrated high stability and an absence of aggregation in water and PBS medium. Thus, Ci-MnFe2O4_CTAB-GNRs hybrid NPs can be considered as a potential contrast agent in MMUS and PAI and a heat generator in MH.

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Section: Methodsmentioning

confidence: 99%

“…It should be mentioned that the US acquisition was synchronized with the magnetic excitation through a computer using a LabVIEW interface. This system operated with a frame rate of 4 kHz, and the magnetic pulse duration varied from 4 to 8 ms [ 44 ]. The maximum magnetic field applied 2 mm from the tip of the core was 740 mT.…”

Section: Methodsmentioning

confidence: 99%

Hybrid Nanoparticles of Citrate-Coated Manganese Ferrite and Gold Nanorods in Magneto-Optical Imaging and Thermal Therapy

et al. 2023

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“…Nevertheless, their implementation involves high costs and special infrastructure installation and still presents minimum load impedance defined by the output power. Recently, other studies using pulsed magnetic field generators based on capacitor discharge [25,52,53] have shown improvements in magnetic field features such as field magnitude up to 950 mT, acceptable variable pulse duration (2 ms -1s), and capabilities of driving low-impedance coils, lower than 2 Ω.…”

Section: Chapter 2: Development Of Pulsed Magnetomotive Ultrasound Im...mentioning

confidence: 99%

“…Therefore, by increasing the magnetic field generated, the induced displacement is enhanced and, consequently, improving the MMUS imaging contrast and the signal-to-noise ratio [26,52]. Another important term is magnetic field time dependence, which is associated with the magnetic field waveform and attractive magnetic force.…”

Section: A Magnetic Forcementioning

confidence: 99%

“…For example, the temperature-induced fluctuations in the speed of sound lead to time-delayed echoes in the backscattered signals [121], enabling the mapping of tissue temperature variation. Additionally, ultrasonic approaches can monitor changes in tissue elasticity, serving as an indicator of temperature variations during the procedure [52,122].…”

Section: Chapter 4: Development An Automated Theranostic Platform Int...mentioning

confidence: 99%

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Development of an automated theranostic platform combining magnetomotive ultrasound and magnetic hyperthermia

Mazón Valadez

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A pulsed magnetomotive ultrasound imaging system for magnetic nanoparticle detection

Cited by 2 publications

References 10 publications

Hybrid Nanoparticles of Citrate-Coated Manganese Ferrite and Gold Nanorods in Magneto-Optical Imaging and Thermal Therapy

Hybrid Nanoparticles of Citrate-Coated Manganese Ferrite and Gold Nanorods in Magneto-Optical Imaging and Thermal Therapy

Development of an automated theranostic platform combining magnetomotive ultrasound and magnetic hyperthermia

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