Lorenzo Spicci

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The design and optimization of high performance ultrasound imaging probes often needs a reliable model to provide performance estimates related to project upgrades. Finite Element Model (FEM) is the most powerful and comprehensive tool available for this application, but needs a very fine preliminary tuning procedure in order to obtain consistent results.(More)
The advantages of the multilayer ultrasound transducers (MLT) compared to classic single layer transducers (SLT) are lower electrical impedance and better signal-to-noise ratio (SNR). These properties were emphasised in the last two decades. However, to our knowledge, unbiased receiving relative sensitivity results as well as surface temperature experiments(More)
Due to their higher transmit efficiency and better received SNR compared to single layer technology, multilayer transducers with uniform layers (MLU) are currently in research and use. Altering the intrinsic geometrical or material homogeneity (i.e. different thicknesses of the constitutive layers, piezoceramic/piezocomposite or piezoceramic/piezopolymer(More)
The paper reports the experimental investigation of the behavior of 2-2 Lead Zirconate Titanate (PZT)-polymer composite transducers array for clinical ultrasound equipments. Several 2-2 plate composites having the same dicing pitch of 0.11 mm and different volume fractions were manufactured and investigated. Measurements were performed through different(More)
Piezoceramic-polymer composite materials are widely used as active materials for ultrasound arrays. The main advantages of composite are a high electromechanical conversion efficiency and low mechanical impedance. In a traditional production process, individual elements of a one-dimensional array are usually sub-diced into sub-elements to avoid spurious(More)
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