Beamforming Strategies for Medical Ultrasound Imaging

From wave speed to cardiac stiffness

Diastolic heart failure is one of the principal causes of death in Western countries, and there is currently no treatment available; prevention, on the other hand, may be possible, provided an early enough diagnosis. The worsening of diastolic functionality is associated with increased values of cardiac stiffness, which could therefore provide a...

High-precision Versatile Ultrasonic Flow Meters Based on Matrix Transducer Arrays

Ultrasonic flow meters are widely applied to measure flow in a variety of applications. The vast majority of ultrasonic flow meters are based on the measurement of the transit time of an acoustic pulse through the fluid. This can either be done in-line, by inserting a spool piece with ultrasonic transducers into the pipe carrying the fluid, or...

Ultrasound Matrix Transducers for High Frame Rate 3D Medical Imaging

Microwave Field Applicator Design in Small-Scale Chemical Processing

Ever since the first experiments nearly three decades ago, microwave enhanced chemistry has received incessant scientific attention. Many studies report improved process performance in terms of speed and conversion under microwave exposure and therefore it is recognized as a promising alternative method of process activation. It has also raised...

Modeling of nonlinear medical diagnostic ultrasound

In this PhD Thesis, a numerical method is described that accurately predicts the pulsed acoustic pressure field generated by a medical diagnostic phased array transducer in a nonlinear acoustic medium. The method is called the Iterative Nonlinear Contrast Source (INCS) method, and it is capable of handling a large-scale, threedimensional domain...