Showing 20 articles starting at article 181
Categories: Physics: Acoustics and Ultrasound
Published Magnetic field from MRI affects focused-ultrasound-mediated blood-brain barrier
(via sciencedaily.com) Researchers have found that the magnetic field of the MRI scanner decreased the BBB opening volume by 3.3-fold to 11.7-fold, depending on the strength of the magnetic field, in a mouse model.
Published A tiny device incorporates a compound made from starch and baking soda to harvest energy from movement
(via sciencedaily.com) Scientists have used a compound made from a starch derivative and baking soda to help convert mechanical to electrical energy. The approach is cost-effective and biocompatible, and can help charge low-energy electronics like calculators and watches.
Published New tool activates deep brain neurons by combining ultrasound, genetics
(via sciencedaily.com) A team has developed a new brain stimulation technique using focused ultrasound that is able to turn specific types of neurons in the brain on and off and precisely control motor activity without surgical device implantation.
Published Silicon chips combine light and ultrasound for better signal processing
(via sciencedaily.com) High-end wireless and cellular networks rely on light for the distribution of signals. The selective processing of such signals requires long delays: too long to support on a chip using light alone. A research team brought together light and ultrasonic waves to realize ultra-narrow filters of microwave signals, in silicon integrated circuits. The concept allows large freedom for filters design.
Published Tiny, wireless, injectable chips use ultrasound to monitor body processes
(via sciencedaily.com) Researchers report that they have built what they say is the world's smallest single-chip system, consuming a total volume of less than 0.1 mm3. The system is as small as a dust mite and visible only under a microscope. In order to achieve this, the team used ultrasound to both power and communicate with the device wirelessly.
Published Release of drugs from a supramolecular cage
(via sciencedaily.com) How can a highly effective drug be transported to the precise location in the body where it is needed? Chemists now present a solution using a molecular cage that opens through ultrasonification.
Published Focused ultrasound enables precise noninvasive therapy
(via sciencedaily.com) New research demonstrates that noninvasive neuromodulation via low-intensity ultrasound can have cell-type selectivity in manipulating neurons.
Published Using sound waves to make patterns that never repeat
(via sciencedaily.com) Mathematicians and engineers have teamed up to show how ultrasound waves can organize carbon particles in water into a sort of pattern that never repeats. The results, they say, could result in materials called 'quasicrystals' with custom magnetic or electrical properties.
Published Reading minds with ultrasound: A less-invasive technique to decode the brain's intentions
(via sciencedaily.com) A new brain imaging application uses ultrasound to predict intended movements before they happen.
Published Ultrasound has potential to damage coronaviruses, study finds
(via sciencedaily.com) A new study suggests coronaviruses, including the virus that causes COVID-19, may be vulnerable to ultrasound vibrations. Simulations suggest ultrasound waves at medical imaging frequencies can cause the virus' shell and spikes to collapse and rupture.
Published Quadruple fusion imaging via transparent ultrasound transducer
(via sciencedaily.com) Scientists have developed a quadruple fusion optical and ultrasound imaging system using a transparent ultrasound transducer.
Published Life's rich pattern: Researchers use sound to shape the future of printing
(via sciencedaily.com) Original source Researchers have developed a way to coax microscopic particles and droplets into precise patterns by harnessing the power of sound in air. The implications for printing, especially in the fields of medicine and electronics, are far-reaching.
Published Swimming upstream on sound waves
(via sciencedaily.com) Original source Scientists have succeeded in propelling microvehicles against a fluid flow using ultrasound. In future, these tiny vehicles are set to be introduced into the human bloodstream, thereby revolutionizing the field of medicine.