Results 21 to 30 of about 4,747,502 (267)
An Ultrasonically Actuated Needle Promotes the Transport of Nanoparticles and Fluids [PDF]
, 2021 Non-invasive therapeutic ultrasound methods, such as high-intensity focused ultrasound (HIFU), have limited access to tissue targets shadowed by bones or presence of gas. This study demonstrates that an ultrasonically actuated medical needle can be used to translate nanoparticles and fluids under the action of nonlinear phenomena, potentially ...
arxiv +1 more source
International Journal of Hyperthermia, 2020 Aim The purpose of this study is to observe the volume change of prostate and laser-ablated lesions in the canine and to explore the mechanism and clinical significance through histopathology. Materials and methods Transperineal laser ablation (TPLA) was
Rui-Qing Liu +9 more
doaj +1 more source
Journal of Oral Research, 2022 Objective: This study aimed to compare the effect of ibuprofen and low-intensity pulsed ultrasound (LIPUS) on the reduction of pain after the placement of initial archwire in orthodontic patients.
Fahimeh Farzanegan +3 more
doaj +1 more source
Classical and learned MR to pseudo-CT mappings for accurate transcranial ultrasound simulation [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency
Control, vol. 69, no. 10, pp. 2896-2905, Oct. 2022, 2022 Model-based treatment planning for transcranial ultrasound therapy typically involves mapping the acoustic properties of the skull from an x-ray computed tomography (CT) image of the head. Here, three methods for generating pseudo-CT images from magnetic resonance (MR) images were compared as an alternative to CT. A convolutional neural network (U-Net)
arxiv +1 more source
Comparison of efficacy of various intracanal irrigants with ultrasonic bypass system
Journal of Pharmacy and Bioallied Sciences, 2021 Background: The long-term success of root canal therapy depends on the effective debridement and removal of smear layer and debris from the canal. Root canals with difficult anatomy and complex systems pose great challenge to achieve this.
Sonal Sinha +5 more
doaj +1 more source
Motion rejection and spectral unmixing for accurate estimation of in vivo oxygen saturation using multispectral optoacoustic tomography [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency
Control, 2023, pp.1-1, 2023 Multispectral Optoacoustic Tomography (MSOT) uniquely enables spatial mapping in high resolution of oxygen saturation (SO$_2$), with potential applications in studying pathological complications and therapy efficacy. MSOT offers seamless integration with ultrasonography, by using a common ultrasound detector array.
arxiv +1 more source
Low-Frequency Ultrasound Therapy in Combination Treatment of Patients with Type 2 Diabetes Mellitus
Mìžnarodnij Endokrinologìčnij Žurnal, 2013 Background. Hypoglycemic therapy used at present in patients with type 2 diabetes mellitus (DM) does not always lead to desired result and many patients live in a state of constant decompensation of metabolic processes, with the high levels of glycemia ...
YE.E. LAVRINENKO
doaj +1 more source
Healthcare Technology Letters, 2019 High-intensity focused ultrasound (HIFU) therapy represents an image-guided and non-invasive surgical approach to treat uterine fibroid. During the HIFU operation, it is challenging to obtain the real-time and accurate lesion contour automatically in ...
Guochen Ning, Xinran Zhang, Hongen Liao
doaj +1 more source
Numerical analysis of effective refractive index ultrasonic sensor based on Cantilever arm structure slot-based dual-micro-ring resonator [PDF]
Int.J.Mod.Phys.B,35(4):2150058(2021), 2022 We propose a novel ultrasonic sensor structure composed of Cantilever arm structure slot dual-micro-ring resonators(DMRR).We present a theoretical analysis of transmission by using the coupled mode theory.The mode field distributions and sound pressure distributions of transmission spectrum are obtained from 3D simulations based on Comsol Multi-physics(
arxiv +1 more source
Quantification of Ultrasonic Texture heterogeneity via Volumetric Stochastic Modeling for Tissue Characterization [PDF]
Medical Image Analysis, vol. 21(1), pp. 59-71, 2015, 2016 Intensity variations in image texture can provide powerful quantitative information about physical properties of biological tissue. However, tissue patterns can vary according to the utilized imaging system and are intrinsically correlated to the scale of analysis.
arxiv +1 more source