482 results about "Ultrasonic radiation" patented technology

A method for ablating tissue with ultrasonic energy is provided. The method including: generating ultrasonic energy from one or more ultrasonic transducers; and focusing the ultrasonic energy in the radial direction by one of: shaping the one or more ultrasonic transducers to focus ultrasonic energy in the radial direction; and arranging one or more lenses proximate the one or more ultrasonic transducers for focusing the ultrasonic energy from the one or more ultrasonic transducers in a radial direction.

The present invention relates to systems and methods for localized delivery of heat, useful for localized imaging and treatment of a biological material. The systems and methods of the invention can be utilized for localized treatment of cancer, inflammation or other disorders involving over proliferation of tissue, and for tissue repair. The method comprises exposing nanoparticles to electromagnetic radiation under conditions wherein the nanoparticles generate microbubbles which emit heat when exposed to ultrasonic radiation.

A system and method for assessing the quality of spot weld joints between pieces of metal includes an ultrasound transducer probing a spot weld joint. The ultrasound transducer transmits ultrasonic radiation into the spot weld joint, receives corresponding echoes, and transforms the echoes into electrical signals. An image reconstructor connected to the ultrasound transducer transforms the electrical signals into numerical data representing an ultrasound image. A neural network connected to the image reconstructor analyzes the numerical data and an output system presents information representing the quality of the spot weld joint. The system is trained to assess the quality of spot weld joints by scanning a spot weld joint with an ultrasound transducer to produce the data set representing the joint; then physically deconstructing the joint to assess the joint quality.

A method and apparatus for separating a mixture of particles of various sizes in a capillary tube into groups by size using multiple forces of controlled amplitude. Ultrasonic radiation at a first selected frequency is applied to set up a standing pressure wave in the capillary tube, resulting in a first aggregating force which causes particles of all sizes to aggregate at positions within the capillary tube which correspond to nodes or anti-nodes of the standing wave. Transverse vibrations are also applied to the capillary tube. The frequency of the ultrasonic radiation is adjusted to reduce the magnitude of the first aggregating force. Inertial forces resulting from the transverse vibrations then cause the particles to separate by size. The apparatus and method allows a mixture of particles to be separated by size quickly, without requiring the use of high voltages.

An ultrasound oral hygiene and therapeutic device comprises an array of ultrasonic transducers, a power generator, and a filling element. The ultrasonic transducer array, with optional radiation plates and reflection plates, produce uniform ultrasound radiation on each surface desirable to be treated by ultrasound radiation. The soft and resilient filling element snugly fits into a user's oral cavity, confines cleaning solution and the ultrasound action within a limited ultrasound action zone surrounding the surfaces desirable to be treated, and protects all other parts of the oral cavity from ultrasound radiation. The device provides superior, uniform, and consistent cleaning results in a short time. In particular, it cleans the entire dental surface, including the inter-dental and gingival areas. It is extremely easy to use, quiet, durable, energy efficient, and inexpensive in long run.

An apparatus having a coil of wire, energized by a repetitively pulsed radio frequency (RF) power source to provide electromagnetic fields to a region within a body. A scanning, directional hydrophone acoustically connected to the body, samples ultrasonic radiation generated by the RF fields at the RF frequency or twice the RF frequency induced from conductive spots. Signals from the hydrophone are analyzed with regard to their time of arrival relative to the RF pulses and with respect to their direction of arrival. These collected data are recorded and displayed as images of the spots within the region.

The invention relates to a preparation method of a high purity and high concentration graphene suspension, which comprises the following steps of: reacting natural crystalline flake graphite with a strong oxidizer to obtain graphite oxide; spreading the graphite oxide into a dispersing agent, and obtaining a graphene oxide suspension by ultrasonic dispersion; mixing the graphene oxide suspension with hydrazine hydrate under the protection of nitrogen and reacting at constant temperature under ultrasonic radiation to prepare stable graphene suspension. Compared with the traditional method for preparing the graphene suspension, the method introduces ultrasonic in the reduction process of the graphite oxide. The invention has the following advantages that the prepared graphene suspension has high concentration (higher than 1 mg.mL<-1>), high purity (without influence of surface active agents and other impurities), high dispersionstability (time for stable dispersion is more than 60 days) and the like; the graphene prepared by the method has high electrical conductivity (high than 700 S.m<-1>), less number of layers, is simple and easy to implement, and is very suitable for large scale production in industy.

The method and device of the present invention for wound treatment with ultrasound standing waves includes a transducer probe to produce ultrasonic waves. The ultrasonic transducer has a tip with a distal radiation surface that radiates ultrasound energy toward the surface of a wound. Ultrasound standing waves occurring as a result of incident and reflected waves from the wound surface create ultrasonic radiation pressure. Ultrasound radiation pressure increases the blood flow in wound area, and ultrasound waves kill bacteria, stimulate healthy tissue cell and treat wounds.

A method of damaging a target tissue of a subject is disclosed. The method comprises: (a) imaging a region containing the target tissue; (b) determining a focal region of a damaging radiation; (c) positioning the focal region onto the target tissue; and (d) damaging the target tissue by an effective amount of the damaging radiation. The determination of the focal region is by delivering to the region bursts of ultrasonic radiation from a plurality of directions and at a plurality of different frequencies, and passively scanning the region so as to receive from the region ultrasonic radiation having at least one frequency other than the plurality of different frequencies.

An ultrasound catheter comprises an elongate tubular body. The elongate tubular body has a proximal region and a distal region opposite the proximal region. The tubular body defines a central lumen having a central lumen diameter. The ultrasound catheter further comprises an elongate, hollow inner core extending through the central lumen. The elongate, hollow inner core has an inner core outer diameter that is less than or equal to the central lumen diameter. The ultrasound catheter further comprises an ultrasound radiating member positioned within the distal region of the tubular body and between the tubular body and the inner core. The ultrasound catheter further comprises at least two electrical conductors extending between the tubular body proximal region and the tubular body distal region. The at least two electrical conductors are positioned between the tubular body and the inner core. The at least two electrical conductors are electrically connected to the ultrasound radiating member. The at least two electrical conductors are wrapped around the inner core a plurality of times in a region between the ultrasound radiating member and the tubular body proximal region.

A method for measuring in non-invasive manner the concentration of blood constituents by which backscattered light is measured under the action of ultrasonic radiation focused towards the inside of a central blood vessel. A light source and detection unit are arranged to detect the backscattered light on the skin surface above the blood vessel. The target tissue is illuminated by two discrete optical wavelengths. An average light intensity distribution is detected over the length of a pulse. The distribution is Fournier transformed, and the largest Fournier components and spectral position are determined in relation to the frequency of the ultrasonic radiation. The component concentration in the blood vessel is calculated taking into account the volume of the ultrasonic focus contributing to the signal and blood flow rate.

The invention provides a system and method for limited view ultrasound imaging of a 2D section or a 3D volume of a body part. Ultrasound sensors configured are spatially or temporally arrayed in a limited view circular arc or over at least part of a concave surface such as a hemisphere. A processor calculates from detected ultrasound radiation a beam forming (BF) functional and calculates from the free amplitudes a point spread function (PSF). A filter g(k) is calculated from the Fourier transform H_BF(k) of the PSF that is used to generate an image of the 2D section or the 3D volume of the body part.

The invention discloses a physical method for treating vitamin C production wastewater by strengthening and catalyzing ozonization. Ultrasonic radiation, ultraviolet irradiation and hydrodynamic cavitation methods are adopted to be combined with a chemical method for heterogeneously catalyzing the oxidation of ozone respectively to ensure that organic matters in vitamin C wastewater are oxidized and degraded into CO2, and the generated CO2 makes Ca ions in the wastewater precipitated. Compared with single heterogeneous catalysis to the oxidation of the ozone, the utilization rate of the ozone of the method is improved by 1.3 to 4 times, and oxygen consumption and operating cost are remarkably reduced; the COD value of output water can be less than 80mg/L, the decolorization ratio reaches 100 percent, the output water has no peculiar smell, the total hardness removal rate is more than 90 percent, and the removal rate of the organic matters is more than 95 percent; and the method has no secondary pollution, and the treated VC wastewater can reach the national grade one discharge standard or is used as process water for recycling.

A cleaner apparatus for use in a dental prophylaxis process includes an applicator defining a curved occlusal wall, a buccal wall, a lingual wall, and a distal wall, each of the buccal wall, the lingual wall and distal walls extending outwardly from the occlusal wall and forming a curved applicator configured to receive a patient's teeth in one of the maxillary arch and mandibular arch of the patient. The applicator being configured to receive and contain a cleaning agent in the cavity during a teeth cleaning process. An ultrasonic transducer is embedded within each of the buccal wall and the lingual wall of the applicator. A controller is electrically coupled to the transducers for powering the transducers and controlling the operation thereof, and the cleaner apparatus for cleaning a full arch of a patients teeth via cavitation of the cleaning agent resulting from ultrasonic radiation transmitted from the transducers.

The invention involves a load palladium amorphous alloy catalyst used for nitrophenol hydrogenation and preparation method and belongs to catalyst technology field. Said catalyst uses NaY, MCM-41, molecular screen, Al2O3, TiO2, SiO2 or MgO as carrier, and is loaded with Pd-B amorphous alloy, the quality of Pd is 0.1-0.5% of toatl quality of catalyst. The preparation process includes ultrasonic dispersion, vacuum impregnation, KBH4 chemical reduction under vacuum conditions, filtration and washing of carriers; it is characterized by introducing vacuum and ultrasonic radiation conditions. The advantages of the invention lies in its high activity of catalyst, low preparation cost and simple preparation process, it could widely apply to the preparation of p-aminophenol through nitrophenol catalysis and hydrogenation.