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Showing 1 to 20 of 1497 for “"ultrasound"”.
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Quantification of Ultrasound Contrast Agents Using High-Frequency Ultrasound
Ultrasound contrast agents (UCAs) are small microbubbles filled with gas. Because of their scattering properties, UCAs enhance the diagnostic capabilities of ultrasonic imaging. UCAs are associated with therapeutic or enhancing therapeutic applications of ultrasound and with possible adverse …
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Non-contact ultrasound
… and evaluation of two novel non-contact ultrasound imaging methods: immersion ultrasound and optical ultrasound. Immersion ultrasound utilizes traditional piezoelectric elements in a tomographic framework to develop new algorithms and acquisition methods for quantification of tissue …
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An Automated Ultrasound Calibration Framework Incorporating Elevation Beamwidth for Tracked Ultrasound Interventions
… toward minimally invasive procedures, tracked ultrasound (US), an emerging technology that uniquely combines US imaging and position tracking, has been increasingly used for intraoperative guidance in surgical interventions. The intrinsic accuracy of a tracked US system is primarily determined …
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Ultrasound-enhanced Fibrinolysis Pro-fibrinolytic and Non-beneficial Effects Of Ultrasound Exposure
… in ischemic organs, during exposure to pulsed ultrasound. This was accomplished by studies of the effects of different intensities of pulsed ultrasound exposure on the fibrinolytic properties of streptokinase and reteplase. Measurements were performed both following pre-exposure of the drugs …
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Evaluating Bone by Ultrasound
… and non-ionizing nature, non-invasive ultrasound techniques have been investigated as tools for evaluating bone quality and biomechanical competence. Quantitative ultrasound has been used clinically as a surrogate for the current gold standard measure in osteoporosis diagnosis - Bone …
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Cavitation in focused ultrasound
… developed combining a high intensity<br/>focused ultrasound source and a pulsed-laser, for the study<br/>of cavitation in a field typical of those used for therapeutic ultrasound.<br/>The sonoptic chamber is specifically designed to avoid the formation<br/>of acoustic standing waves, known to have …
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Environmental Applications of Ultrasound
As previously reported, molybdenum carbonyl and tungsten carbonyl were decomposed sonochemically in hexadecane to form porous aggregates of 2--3 nm high surface area Mo2C and W2C particles. The activity of these materials was studied for the catalytic hydrodehalogenation of aliphatic and aromatic …
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Radiative transfer of ultrasound
Radiative transfer theory is used to model the multiple scattering of diffuse ultrasonic waves in two types of random media. The first type is an isotropic, homogeneous medium containing randomly oriented, randomly located scatterers. The scatterers are assumed to be uncorrelated. This assumption …
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Ultrasound tissue perfusion imaging
… ischemic states. In addition, the use of the new ultrasound imaging coupled with other imaging modalities helps to illuminate the complex mechanism that mediates neovascularization in response to vascular occlusion. Consequently, these techniques have the potential to increase the effectiveness of …
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Improving Healthcare Professionals’ Ultrasound-Guided Peripheral Vascular Access Ability Utilizing Homemade Ultrasound Phantoms
… competence, knowledge, and skills in placing ultrasound-guided peripheral intravenous catheters using homemade ultrasound phantom models.Background: Ultrasound guidance can reduce the number of attempts to gain peripheral IV access while improving the success rate and satisfaction in patients …
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Ultrasound propagation in colloidal dispersions
… brief description of the properties and uses of ultrasound propagation in dispersions is followed by an extensive review of theories which relate the particulate properties of the dispersions to the measurable ultrasonic parameters, velocity (c) and attenuation (a [alpha]). Measurement principles …
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Nanostructured Materials Prepared With Ultrasound
USP has proven to be an excellent method to produce organic-inorganic hybrid materials. Nanoporous silica spheres incorporated with various organic dyes are synthesized by USP and utilized in colorimetric sensing arrays for the identification of aliphatic amines. Further usefulness of USP is …
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Microspheres and Nanoparticles From Ultrasound
In the case of titania microspheres, they are rapidly taken up into the cytoplasm of mammalian cells and nearly noncytoxic. Small molecules like Rhodamine and DHED (dehydroevodiamine HCl; Alzheimer's disease therapeutic) can be delivered along with them. Furthermore, synthesis of carbon …
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The chemical effects of ultrasound
The use of high intensity ultrasound to enhance the reactivity of heterogeneous, liquid-solid reactions has become a routine synthetic technique. Typically, ultrasound reduces reaction temperatures and increases rates of reaction while improving product yields. In spite of this, our understanding …
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Improvements in ultrasound image resolution
U of I Only Restriction set for Item 117773 on 2021-06-02T16:15:14Z with date by madinag@illinois.edu.
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Handheld force-controlled ultrasound probe
An hand-held force controlled ultrasound probe has been developed. The controller maintains a prescribed contact force between the probe and a patient's body. The device will enhance the diagnostic capability of free-hand elastography, swept-force compound imaging, and make it easier for a …
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Automated Optimal Ultrasound Transducer Simulator
… increasing. However, the prototyping process of ultrasound devices can be incredibly costly. In order to save time, many researchers run simulations in order to analyze the performance of their prototypes to help guide their manufacturing decisions. Unfortunately, many of these simulations need …
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Fluidic ultrasound generation for nondestructive testing
… in numerous technical domains. Air-coupled ultrasound offers advantages in terms of measurement flexibility and reduced measurement time, but also presents challenges due to limitations in transmitted sound pressure amplitude and sensor positioning. Due to the high impedance mismatch at the …
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