Engineering Ultrasound Fields to Power Medical Micro/Nanorobots

High Power Focused Ultrasound Fields in Therapeutic Medical Applications: Modeling and Measurements with a Fiber Optic Hydrophone

The goal of this work was to determine the acoustic waveform and beam width at the focus of a therapeutic ultrasound source both in water and in a tissue phantom. The source was a 2 MHz transducer of 45 mm focal length, 42 mm diameter, operating at 50 300 W acoustic power. Focal waveforms and beam widths calculated with a KZK-type model were in excellent agreement with values measured with a 10...

From confining fields back to power corrections

We overview the issue of the power corrections to the parton model, mostly within the context of QCD sum rules. There are a few sources of the power corrections responsible for various qualitative effects. The basic idea that the power corrections are related to confining fields seems to be realized in case of 1/Q corrections which are dual to high orders of perturbation theory. The evidence co...

Ultrasound Fields in an Attenuating

Ultrasound elds propagating in tissue will undergo changes in shape not only due to diiraction, but also due to the frequency dependent attenuation. Linear elds can be fairly well predicted for a non-attenuating medium like water by using the Tupholme-Stepanishen method for calculating the spatial impulse response, whereas the eld cannot readily be found for an attenuating medium. In this paper...

Bridging from medical informatics, biometry and epidemiology to medical engineering.

The 53rd Annual Conference of the German Society of Medical Informatics, Biometry, and Epidemiology (GMDS), September 15–19, 2008 in Stuttgart, had the thematic focus “Bridging from Medical Informatics, Biometry and Epidemiology to Medical Engineering”. GMDS members pioneered in the development of algorithms and analytical procedures, which are now routinely used for the monitoring of physiolog...

Medical Diagnostic Ultrasound