Estimation of Acoustic Power Output from Electrical Impedance Measurements

Csány, Gergely; Gray, Michael; Gyöngy, Miklós

doi:10.3390/acoustics2010004

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Linearity refers to the ability of the amplifier to produce signals that are accurate copies of the input, generally at increased power levels [19][20][21].…”

Section: Linearity Of the Mass Vs Electric And Fus Output Powermentioning

confidence: 99%

A “user-friendly” phantom to conduct Quality Controls on MRgFUS device

Acri

Caridi

Testagrossa

et al. 2022

J. Phys.: Conf. Ser.

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Magnetic Resonance guided Focused Ultrasound Surgery (MRgFUS) is a hybrid technique which uses Magnetic Resonance (MR) to obtain morphological information of the examined anatomical district and Focused Ultrasound Surgery (FUS) to ablate the body region under investigation by using MR as guidance. To ensure patients’ safety is necessary to establish periodic Quality Controls (QCs) providing a complete evaluation of system status. QCs cannot be done directly on patients, for this reason, dedicated phantoms are used to guarantee the maintenance of quality over equipment lifetime. Several phantoms are available on the market, which are distributed by manufacturers and specific to the medical equipment, resulting in closed systems. In this study, we idealized, developed and created a prototype of a completely “;user-friendly”; phantom, to conduct QCs on FUS devices. It consists of an empty cylinder of polymethylmetacrylate (PMMA), that can be filled with different fluids and various inserts, available for the Medical Physicists, to perform test measurements on different parameters (size of FUS spot, precision of FUS spot, linearity of FUS power, linearity of electric power, evaluation of target temperature). The obtained results demonstrated that the novel phantom represents a useful and adaptable device that could be used during FUS QCs evaluations.

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“…Linearity refers to the ability of the amplifier to produce signals that are accurate copies of the input, generally at increased power levels [19][20][21].…”

Section: Linearity Of the Mass Vs Electric And Fus Output Powermentioning

confidence: 99%

A “user-friendly” phantom to conduct Quality Controls on MRgFUS device

Acri

Caridi

Testagrossa

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

Nanogenerator for determination of acoustic power in ultrasonic reactors

Mistewicz

Jesionek

Kim

et al. 2021

Ultrasonics Sonochemistry

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Suspending droplets beyond the Rayleigh limit: The interplay of acoustic and gravity forces

Thirisangu,

Hemachandran,

Subramani

2023

Physics of Fluids

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In this work, we experimentally investigate the suspension behavior of droplets subjected to standing acoustic waves. We focus on the droplet sizes beyond the Rayleigh limit, i.e., when the droplet size is comparable to the wavelength of the acoustic wave. We show that an acoustic field can disrupt the uniform motion of aqueous droplets in oil and cause them to either suspend or settle, depending on the interplay between acoustic and gravity forces. Remarkably, in contrast to droplets within the Rayleigh limit, the critical acoustic power or minimum pressure amplitude required to suspend droplets beyond the Rayleigh limit is dependent on the droplet size. As the droplet size increases, the critical acoustic power increases significantly. Building upon this understanding, a novel sorting method is proposed based on critical acoustic power.

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Estimation of Acoustic Power Output from Electrical Impedance Measurements

Cited by 3 publications

References 11 publications

A “user-friendly” phantom to conduct Quality Controls on MRgFUS device

A “user-friendly” phantom to conduct Quality Controls on MRgFUS device

Nanogenerator for determination of acoustic power in ultrasonic reactors

Suspending droplets beyond the Rayleigh limit: The interplay of acoustic and gravity forces

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