Developing Electrostatically Driven Ultrasound Transducer with High Sound Intensity and High Energy Conversion Efficiency

High-Intensity Focused Ultrasound –

High intensity focused ultrasound (HIFU).

INTRODUCTION Curative treatments for localized prostate cancer, from least invasive to most invasive, include brachytherapy, cryosurgery, three-dimensional conformal radiation therapy, external beam radiation therapy, and radical prostatectomy. A patient with localized, low risk or intermediate risk prostate cancer who is diagnosed at an early age and receives one of these treatments has only a...

Heart ablation using a planar rectangular high intensity ultrasound transducer and MRI guidance.

The aim of this study was to evaluate a flat rectangular (3×10mm(2)) MRI compatible transducer operating at 5MHz. The main task was to explore the feasibility of creating deep lesions in heart at a depth of at least 15mm. The size of thermal necrosis in heart tissue was estimated as a function of power and time using a simulation model. The system was then tested in an excised lamb heart. In th...

High Energy High Intensity Hadron Beams

This report contains the final proceedings of the 2nd meeting in the framework of the CARE-HHH-ABI networking, held 1.-2. December 2004, in Lyon, with the subject: "DC current transformers and beam-lifetime evaluations". The European Community wants to reinforce the communication between scientific laboratories of similar nature in the field of high energy high intensity hadron beams. For this ...

Electrostatically-driven elastomer components for user-reconfigurable high density microfluidics.

This paper presents the design, fabrication, and characterization of an electrostatically actuated user-reconfigurable elastomer microfluidic system intended for very large scale integration (VLSI) microfluidics. By adding thin film metal flexures into the PDMS polymer, individual elastomer channels were made to self-close without the use of pneumatics via the application of 15-20 V, 5 MHz sign...