Piero Tortoli (M’91-SM’96-F’19) received the Laurea degree in electronics engineering from the University of Florence, Italy, in 1978. Since then, he has been on the faculty of the Information Engineering Department at the same university, where he is currently a full Professor of Electronics. He is leading the Microelectronics Systems Design Laboratory. His research interests include the development of open ultrasound research systems and novel imaging/Doppler methods. He has authored more than 300 papers on these topics.
Professor Tortoli is a Fellow of IEEE and AIMBE, “Docteur Honoris causa” of the University Claude Bernard Lyon 1, and an Honorary Member of the Polish Academy of Sciences. He chaired the 22nd International Symposium on Acoustical Imaging (1995), the 12th New England Doppler Conference (2003), and the Artimino Conference on Medical US Technology (2011, 2017, 2023).
EDUCATION
Electronics Engineering
RESEARCH, TEACHING, or OTHER INTERESTS
Electrical and Electronic Engineering, Biomedical Engineering
367
Scopus Publications
7486
Scholar Citations
46
Scholar h-index
151
Scholar i10-index
Scopus Publications
Multi-Probe Vector Velocity Estimation in Deep and Large Regions of Interest: A Simulation Study Daniele Mazierli, Piero Tortoli, Laura Peralta, Alessandro Ramalli IEEE Transactions on Biomedical Engineering, 2026 OBJECTIVE The current vector velocity measurement techniques are typically limited by probe apertures, which restrict their use to superficial vessels. This work introduces a high frame rate method based on the use of multiple array probes transmitting defocused beams and shows that such a method permits accurate and precise measurements of blood velocities in deep and large regions/volumes of interest. METHODS Multiple probes are positioned to investigate a common region of interest and activated in a sequence. The corresponding phase shifts are estimated and combined through a least square error approach to derive the velocity vector. The method's performance has been quantitatively evaluated in both 2-D and 3-D scenarios through simulations based on either two linear- or three matrix sparsearray probes. RESULTS Good estimations of both module (average rmse(v) 11.9% of vmax) and direction (average rmse(α) 2.3° and rmse(β) 8.0°) of the velocity vectors have been obtained. The corresponding vector velocity frames cover wide areas or volumes even around depths as high as 80 mm. CONCLUSIONS This simulation work demonstrates that multi-probe configurations can be exploited to measure the 2-D or 3-D flow velocity accurately and precisely in deep and large regions of interest. SIGNIFICANCE In a clinical scenario, for example, the method could be exploited for velocity estimation in the abdominal region where large and deep vessels, such as the aorta, are located.
Ultrasound guided blood brain barrier opening using a diagnostic probe in a whole brain model Matteo Gionso, Erica Herlin, Laura Uva, Francesco Guidi, Piero Tortoli, Giovanni Durando, Luca Raspagliesi, Nicoletta Corradino, Veronica Percuoco, Francesco DiMeco, Marco De Curtis, Laura Librizzi, Francesco Prada Scientific Reports, 2025 The blood-brain barrier (BBB) poses a significant challenge to drug delivery to the brain. A promising approach involves low-frequency, low-intensity pulsed ultrasound (US) waves combined with intravenously injected microbubbles (MB) to temporarily and non-invasively open the BBB. However, current technologies cannot easily integrate this procedure with US imaging. Passive cavitation detection, tracing the harmonic emissions of MB during sonication, has been the preferred method for real-time monitoring of US-mediated BBB opening. We used an ultrasound advanced open platform (ULA-OP) to simultaneously perform US-mediated BBB opening and US imaging with a single linear-array probe. In vitro guinea pig brains were perfused with MB and sonicated with different plane-wave transmission patterns. The most effective US pattern was interleaved with B-mode imaging pulses, enabling the direct assessment of the MB distribution during treatment. The extent of BBB permeabilization was assessed by quantifying FITC-albumin extravasation into the brain via confocal microscopy. US-treated hemispheres displayed BBB permeabilization, while control hemispheres did not. B-mode imaging allowed direct evaluation of MB distribution and interaction with the US beam. Therefore, we achieved effective BBB opening and simultaneous MB imaging using the same diagnostic probe, paving the way for US-guided therapeutic ultrasound application in the clinical context.
Specific Filtered Delay Multiply and Sum beamforming for coherent multi-transducer ultrasound imaging Paul Dryburgh, Daniele Mazierli, Joseph V. Hajnal, Piero Tortoli, Alessandro Ramalli, Laura Peralta Ultrasonics, 2025 Coherent multi-transducer ultrasound (CoMTUS) imaging enables the use of multiple arrays as one large effective aperture yielding images with enlarged field-of-view, improved resolution, and higher signal-to-noise ratio. However, creating a large but discontinuous effective aperture increases the grating and sidelobe levels, and generates cross-talk artifacts between arrays. These additional challenges can degrade the contrast of the images obtained through the classic Delay and Sum (DAS) beamforming algorithm. This study investigates the possibility to improve contrast and reduce artifacts in CoMTUS by using an alternative nonlinear beamforming algorithm, the Filtered Delay Multiply and Sum (F-DMAS). We implemented a specific F-DMAS beamforming algorithm for CoMTUS considering the resulting effective aperture and tested its performance in a coherent dual-array system for 2-D imaging. The comparison between CoMTUS images obtained through F-DMAS and DAS was investigated by both simulations and experiments, including in vivo results. For a typical dual-probe configuration, CoMTUS specific F-DMAS was shown to be effective at lowering the sidelobes and the noise floor, resulting in better quality B-mode images with improved sidelobe suppression (first sidelobe amplitude decreased from -13.0 dB to -24.7 dB; side-lobe-to-main-lobe energy ratio decreased from 9.3 dB to 1.9 dB).
Blood-flow Volume Estimation by a 2-D Sparse Array Claudio Giangrossi, Alessandro Ramalli, Francesco Guidi, Emile Noothout, Luxi Wei, Hendrik J. Vos, Piero Tortoli Ultrasound in Medicine and Biology, 2025
Accuracy of flow velocity estimations over regions including great depths: An experimental study Francesco Lagonigro, Piero Tortoli, Alessandro Ramalli, Billy Y. S. Yiu, Alfred C. H. Yu IEEE International Ultrasonics Symposium Ius, 2025 Recent advances in flow imaging have warranted a comprehensive system calibration, from shallow to deep flow regions. When using probes equipped with elevation lenses that focus the acoustic energy over a single (and often shallow) depth, significant differences must be expected from velocity measurements at various depths. This study uses a multi-depth flow phantom to examine how the accuracy and precision of Doppler velocity estimation are impacted by the probe acoustic lenses. The results based on linear array probes experimentally confirm that, in velocity measurements, possible spatial velocity gradients determine performance drops that worsen with the distance from the probe elevation focus.
On the Impact of Microbeamformers in 3-D High Frame Rate Ultrasound Imaging: A Simulation Study Lorenzo Castrignano, Piero Tortoli, Giulia Matrone, Marco Crocco, Alessandro Stuart Savoia, Alessandro Ramalli IEEE Transactions on Biomedical Engineering, 2025 BACKGROUND AND OBJECTIVE: three-dimensional ultrasound imaging is based on two-dimensional (2-D) arrays controlled by application-specific integrated circuits, which implement the so-called microbeamformer (µB) to reduce the channel count. µBs are designed for line-by-line scan sequences based on focused beams (FBs), providing low frame rates. On the other hand, high frame rate (HFR) imaging techniques using defocused beams are increasingly attractive for reconstructing detailed tissue and blood motion information. Although an increasing number of researchers works with µBs integrated into 2-D probes, there is limited literature on the influence of the µB on image quality in HFR imaging applications. METHODS: This simulation work evaluates the µB impact on multi-plane HFR transthoracic echocardiography by considering a µB connected to sub-arrays of different sizes (from 2 × 2 to 8 × 8 elements). Scan sequences based on the transmission of FBs, focused wide beams (FWB), and planar diverging waves (PDW) were tested. B-Mode images were reconstructed and compared to the ideal case (no µB) to assess the image resolution and contrast loss due to the µB. RESULTS: Compared to the ideal case, the µB presence can yield resolution and contrast deterioration up to 17.5% and -26 dB, respectively. Such a deterioration corresponds to the transmission of widest PDW, and can be partially recovered through the synthetic transmit beams technique. CONCLUSION AND SIGNIFICANCE: A µB designed for FB applications can be used for HFR imaging, although with impaired imaging quality. Guidelines are provided to achieve a suitable trade-off among image quality, µB size, channel number and frame rate.
Computationally Efficient SVD Filtering for Ultrasound Flow Imaging and Real-Time Application to Ultrafast Doppler B. Pialot, F. Guidi, G. Bonciani, F. Varray, P. Tortoli, A. Ramalli IEEE Transactions on Biomedical Engineering, 2025 Over the past decade, ultrasound microvasculature imaging has seen the rise of highly sensitive techniques, such as ultrafast power Doppler (UPD) and ultrasound localization microscopy (ULM). The cornerstone of these techniques is the acquisition of a large number of frames based on unfocused wave transmission, enabling the use of singular value decomposition (SVD) as a powerful clutter filter to separate microvessels from surrounding tissue. Unfortunately, SVD is computationally expensive, hampering its use in real-time UPD imaging and weighing down the ULM processing chain, with evident impact in a clinical context. To solve this problem, we propose a new approach to implement SVD filtering, based on simplified and elementary operations that can be optimally parallelized on GPU (GPU sSVD), unlike standard SVD algorithms that are mainly serial. First, we show that GPU sSVD filters UPD and ULM data with high computational efficiency compared to standard SVD implementations, and without losing image quality. Second, we demonstrate that the proposed method is suitable for real-time operation. GPU sSVD was embedded in a research scanner, along with the spatial similarity matrix (SSM), a well-known efficient approach to automate the selection of SVD blood components. High real-time throughput of GPU sSVD is demonstrated when using large packets of frames, with and without SSM. For example, more than 15000 frames/s were filtered with 512 packet size on a 128 × 64 samples beamforming grid. Finally, GPU sSVD was used to perform, for the first time, UPD imaging with real-time and adaptive SVD filtering on healthy volunteers.
Experimental Validation of a Novel High Frame Rate Multi-Probe Vector Doppler Imaging Technique Daniele Mazierli, Claudio Giangrossi, Elisa Caldini, Marta Mencarelli, Luca Puggelli, Piero Tortoli, Alessandro Ramalli IEEE International Ultrasonics Symposium Ius, 2025 Multi-probe ultrasound methods can extend the field of view and improve spatial resolution, with proven effectiveness across various applications. This work presents the first results of the experimental validation of a multi-probe vector Doppler imaging technique for deep vessel flow assessment. Two synchronized scanners controlled two linear arrays transmitting diverging waves in alternating pulse repetition intervals. This enabled the acquisition of four datasets that could be used to compute velocity vectors via least-squares optimization. A 3-D printed holder allowed probe positioning to scan common planar regions of interest at various inter-probe angles. Experiments with a walled flow phantom at 60 mm depth confirmed the method’s accuracy (bias <6%) and precision (σ <10%). The results highlight good lateral velocity estimation, a wide field of view (5.5 cm), and limited sensitivity to angle variations.
A Heterogeneous Ultrasound Open Scanner for the Real-Time Implementation of Computationally Demanding Imaging Methods Giulio Bonciani, Francesco Guidi, Piero Tortoli, Claudio Giangrossi, Alessandro Dallai, Enrico Boni, Alessandro Ramalli IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2025 Ultrasound open scanners have recently boosted the development and validation of novel imaging techniques. They are usually split into hardware- or software-oriented systems, depending on whether they process the echo data using embedded FPGAs/DSPs or a GPU on a host PC. The goal of this work was to realize a high-performance heterogeneous open scanner capable of leveraging the strengths of both hardware and software-oriented systems. The elaboration power of the 256-channel ultrasound advanced open platform (ULA-OP 256) was further enhanced by embedding a compact co-processing GPU system-on-module (SoM). By carefully avoiding latencies and overheads through low-level optimization work, an efficient PCIe communication interface was established between the GPU and the processing devices onboard the ULA-OP 256. As a proof of concept of the enhanced system, the high frame rate color flow mapping technique was implemented on the GPU SoM and tested. Compared to a previous DSP-based implementation, higher real-time frame rates were achieved together with unprecedented flexibility in setting crucial parameters such as the ensemble length (EL). For example, by setting EL=64 and a continuous-time high-pass filter, the flow was investigated with high temporal and spatial resolution in the femoral vein bifurcation (frame rate = 1.1 kHz) and carotid artery bulb (4.3 kHz), highlighting the flow disturbances due to valve aperture and secondary velocity components, respectively. The results of this work promote the development of other computational-expensive processing algorithms in real-time and may inspire the next generation of ultrasound high-performance heterogeneous scanners.
Ultrasound system for real-time multi-probe applications with CMUTs Daniele Mazierli, Alessandro S. Savoia, Claudio Giangrossi, Enrico Boni, Alessandro Ramalli, Muhammad Usman Khan, Monica La Mura, Alvise Bagolini, Piero Tortoli IEEE Ultrasonics Ferroelectrics and Frequency Control Joint Symposium Uffc Js 2024 Proceedings, 2024
Advanced 3-D Packaging for Integrated 2-D PMUT Arrays and Front-End Circuits Alessandro S. Savoia, Monica La Mura, Mohammad Mahdi Dehghan Pir, Enrico Boni, Alessandro Ramalli, Piero Tortoli, Rahul Dutta, Vempati Srinivasa Rao, David Ho Soon, Carlo Luigi Prelini, Mark Shaw, Domenico Giusti IEEE Ultrasonics Ferroelectrics and Frequency Control Joint Symposium Uffc Js 2024 Proceedings, 2024
High-Frame-Rate Volumetric Porcine Renal Vasculature Imaging Luxi Wei, Geraldi Wahyulaksana, Maaike te Lintel Hekkert, Robert Beurskens, Enrico Boni, Alessandro Ramalli, Emile Noothout, Dirk J. Duncker, Piero Tortoli, Antonius F.W. van der Steen, Nico de Jong, Martin Verweij, Hendrik J. Vos Ultrasound in Medicine and Biology, 2023
High-frame-rate Volumetric Porcine Cardiac Imaging Luxi Wei, Geraldi Wahyulaksana, Maaike Te Lintel Hekkert, Daniel Bowen, Robert Beurskens, Enrico Boni, Alessandro Ramalli, Emile Noothout, Dirk J. Duncker, Piero Tortoli, Antonius van der Steen, Nico de Jong, Martin Verweij, Hendrik J. Vos IEEE International Ultrasonics Symposium Ius, 2023
Sparse 2-D PZT-on-PCB Arrays With Density Tapering Luxi Wei, Enrico Boni, Alessandro Ramalli, Fabian Fool, Emile Noothout, Antonius F.W. Van Der Steen, Martin Verweij, Piero Tortoli, Nico De Jong, Hendrik J. Vos IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2022
Genetic Predisposition to Coronary Artery Disease in Type 2 Diabetes Mellitus Natalie R. van Zuydam, Claes Ladenvall, Benjamin F. Voight, Rona J. Strawbridge, Juan Fernandez-Tajes, N. William Rayner, Neil R. Robertson, Anubha Mahajan, Efthymia Vlachopoulou, Anuj Goel, Marcus E. Kleber, Christopher P. Nelson, Lydia Coulter Kwee, Tõnu Esko, Evelin Mihailov, Reedik Mägi, Lili Milani, Krista Fischer, Stavroula Kanoni, Jitender Kumar, Ci Song, Jaana A. Hartiala, Nancy L. Pedersen, Markus Perola, Christian Gieger, Annette Peters, Liming Qu, Sara M. Willems, Alex S.F. Doney, Andrew D. Morris, Yan Zheng, Giorgio Sesti, Frank B. Hu, Lu Qi, Markku Laakso, Unnur Thorsteinsdottir, Harald Grallert, Cornelia van Duijn, Muredach P. Reilly, Erik Ingelsson, Panos Deloukas, Sek Kathiresan, Andres Metspalu, Svati H. Shah, Juha Sinisalo, Veikko Salomaa, Anders Hamsten, Nilesh J. Samani, Winfried März, Stanley L. Hazen, Hugh Watkins, Danish Saleheen, Andrew P. Morris, Helen M. Colhoun, Leif Groop, Mark I. McCarthy, Colin N.A. Palmer, John Danesh, Jeanette Erdmann, Dongfeng Gu, Jaspal S. Kooner, Robert Roberts, Heribert Schunkert, Themistocles L. Assimes, Stefan Blankenberg, Bernhard O. Boehm, John C. Chambers, Robert Clarke, Rory Collins, George Dedoussis, Paul W. Franks, G. Kees Hovingh, Bong-Jo Kim, Terho Lehtimäki, Ruth McPherson, Markku S Nieminen, Christopher O’Donnell, Samuli Ripatti, Manjinder S Sandhu, Stefan Schreiber, Agneta Siegbahn, Cristen J. Willer, Pierre A. Zalloua, Michael Mark, Timo Kanninen, Barbara Thorand, Giuseppe Remuzzi, David Dunger, Angela Shore, Ulf Smith, Per-Henrik Groop, Seppo Ylä-Herttuala, Claudio Cobelli, Riccardo Bellazzi, Ele Ferrannini, Carlo Patrono, Pirjo Nuutila, Paul McKeague, Birgit Steckel-Hamann, Li-ming Gan, Everson Nogoceke, Piero Tortoli, Bernd Jablonka, Mary-Julia Brosnan Circulation Genomic and Precision Medicine, 2020
3-D Super-Resolution Ultrasound Imaging with a 2-D Sparse Array Sevan Harput, Kirsten Christensen-Jeffries, Alessandro Ramalli, Jemma Brown, Jiaqi Zhu, Ge Zhang, Chee Hau Leow, Matthieu Toulemonde, Enrico Boni, Piero Tortoli, Robert J. Eckersley, Chris Dunsby, Meng-Xing Tang IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2020
Virtual real-time: A new US operating modality Claudio Giangrossi, Valentino Meacci, Enrico Boni, Alessandro Dallai, Francesco Guidi, Stefano Ricci, Alfred Yu, Piero Tortoli IEEE International Ultrasonics Symposium Ius, 2019
Sparse Volumetric PZT Array with Density Tapering Hendrik J Vos, Enrico Boni, Alessandro Ramalli, Filippo Piccardi, Andrea Traversi, Davide Galeotti, Emile C Noothout, Verva Daeichin, Martin D Verweij, Piero Tortoli, Nico de Jong IEEE International Ultrasonics Symposium Ius, 2018
A 256-element spiral CMUT array with integrated analog front end and transmit beamforming circuits Alessandro Stuart Savoia, Barbara Mauti, Luca Fanni, Alvise Bagolini, Enrico Boni, Alessandro Ramalli, Federico Guanziroli, Stefano Passi, Marco Sautto, Giulia Matrone, Roberto Bardelli, Pierluigi Bellutti, Fabio Quaglia, Giosuè Caliano, Andrea Mazzanti, Piero Tortoli IEEE International Ultrasonics Symposium Ius, 2018
Towards real-time magnetomotive ultrasound imaging Maria Evertsson, Alessandro Ramalli, Theo Z. Pavan, Luciana C. Cabrelli, Roger Andersson, Magnus Cinthio, Piero Tortoli, Tomas Jansson IEEE International Ultrasonics Symposium Ius, 2017
Next-generation ultrasound research scanners design Piero Tortoli, Enrico Boni, Luca Bassi, Alessandro Dallai, Francesco Guidi, Alessandro Ramalli, Stefano Ricci IEEE International Ultrasonics Symposium Ius, 2017
Towards real-time magnetomotive ultrasound imaging Maria Evertsson, Alessandro Ramalli, Theo Z. Pavan, Luciana C. Cabrelli, Roger Andersson, Magnus Cinthio, Piero Tortoli, Tomas Jansson IEEE International Ultrasonics Symposium Ius, 2017
Open platforms for the advancement of ultrasound research Enrico Boni, Luca Bassi, Alessandro Dallai, Gabriele Giannini, Francesco Guidi, Valentino Meacci, Alessandro Ramalli, Stefano Ricci, Piero Tortoli Lecture Notes in Electrical Engineering, 2016
ULA-OP 256: A portable high-performance research scanner E. Boni, L. Bassi, A. Dallai, G. Giannini, F. Guidi, V. Meacci, R. Matera, A. Ramalli, S. Ricci, M. Scaringella, J. Viti, P. Tortoli 2015 IEEE International Ultrasonics Symposium Ius 2015, 2015
Optimized 2D array design for Ultrasound imaging European Signal Processing Conference, 2012
Embedded Doppler system for industrial in-line rheometry Stefano Ricci, Maxime Liard, Beat Birkhofer, Didier Lootens, Armin Brühwiler, Piero Tortoli IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2012
A novel DSP-based ultrasound research platform for development and test of new imaging and Doppler methods Ederc 2010 European DSP in Education and Research Conference Proceedings, 2010
Voice quality monitoring: A portable device prototype Claudia Manfredi, Tommaso Bruschi, Alessandro Dallai, Alessandro Ferri, Piero Tortoli, Marcello Calisti Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society EMBS 08 Personalized Healthcare Through Technology, 2008
Ultrasonic intensity and Doppler power measurements with uniform and non-uniform polyethylene tubes Proceedings of the IEEE Ultrasonics Symposium, 2003
Acoustic method for real-time visualization of microbubble movements and rupture Proceedings of the IEEE Ultrasonics Symposium, 2003
Observations of radiations forces effects on individual air bubbles with high speed photography Proceedings of the IEEE Ultrasonics Symposium, 2003
M-line processing for real-time investigation of large artery mechanics Proceedings of the IEEE Ultrasonics Symposium, 2003
Digital design improves radar pulse compression Microwaves and RF, 1997
Flow imaging with pulsed Doppler ultrasound: Refraction artefacts and dual mode propagation Proceedings of the IEEE Ultrasonics Symposium, 1997
Spectral analysis of 24 h blood pressure monitoring in the assessment of trough:peak ratio. A randomized, placebo-controlled, cross-over comparison of ramipril and enalapril Blood Pressure Monitoring, 1997
Extraction of velocity information for 90° ultrasound Doppler angles Alta Frequenza Rivista Di Elettronica, 1997
Programmable wideband signal generation and matched filtering through a full digital approach IEEE International Symposium on Spread Spectrum Techniques Applications, 1996
Advances in spectral-analysis-based ultrasound pulsed Doppler systems Proceedings of the Annual Conference on Engineering in Medicine and Biology, 1991
Dependence of Doppler line-flow spectrum on range and beam-to-flow angles: An experimental approach Ultrasonics Symposium Proceedings, 1990
METHOD TO DOUBLE THE ANALYZABLE BANDWIDTH IN SAW CHIRP TRANSFORM PROCESSORS. Wave Electronics, 1980
TECHNIQUE FOR INCREASING THE TRANSFORM SIZE OF SAW CHIRP TRANSFORM PROCESSORS. Ultrasonics Symposium Proceedings, 1980
RECENT SCHOLAR PUBLICATIONS
Design of a Multi-Angle Multi-Depth Flow Phantom for Ultrasound Flow Calibration P Tortoli, F Lagonigro, A Ramalli, G Bonciani, BYS Yiu, ACH Yu IEEE Transactions on Ultrasonics , 2026 2026
Real-time hybrid DAS/F-DMAS block-wise beamforming in imaging systems with 2-D matrix arrays and embedded microbeamformers P Tortoli, V Meacci, L Castrignano, G Matrone, E Boni, A Ramalli IEEE Transactions on Ultrasonics , 2026 2026
DEVELOPMENT AND IMPLEMENTATION OF INNOVATIVE ALGORITHMS FOR HIGH FRAME RATE ULTRASOUND G Bonciani, E Boni, AOP Ramalli, P Tortoli, F Varray, D Garcia 2026
Specific filtered delay multiply and sum beamforming for coherent multi-transducer ultrasound imaging P Dryburgh, D Mazierli, JV Hajnal, P Tortoli, A Ramalli, L Peralta Ultrasonics 155, 107731 , 2025 2025 Citations: 7
Experimental Validation of a Novel High Frame Rate Multi-Probe Vector Doppler Imaging Technique D Mazierli, C Giangrossi, E Caldini, M Mencarelli, L Puggelli, P Tortoli, ... 2025 IEEE International Ultrasonics Symposium (IUS), 1-4 , 2025 2025
A modular and scalable system for the control of large multiple ultrasound arrays F Lagonigro, P Verdi, A Vignoli, V Meacci, P Tortoli, A Ramalli, E Boni 2025 IEEE International Ultrasonics Symposium (IUS), 1-3 , 2025 2025 Citations: 2
Accuracy of flow velocity estimations over regions including great depths: an experimental study F Lagonigro, P Tortoli, A Ramalli, BYS Yiu, ACH Yu 2025 IEEE International Ultrasonics Symposium (IUS), 1-3 , 2025 2025 Citations: 2
Blood-flow volume estimation by a 2-D sparse array C Giangrossi, A Ramalli, F Guidi, E Noothout, L Wei, HJ Vos, P Tortoli Ultrasound in Medicine & Biology 51 (9), 1580-1588 , 2025 2025 Citations: 4
Multi-probe vector velocity estimation in deep and large regions of interest: a simulation study D Mazierli, P Tortoli, L Peralta, A Ramalli IEEE Transactions on Biomedical Engineering , 2025 2025 Citations: 7
An innovative ultrasound research platform integrating an open scanner and a 3072-element dense array L Castrignano, P Tortoli, V Meacci, A Dallai, M Crocco, E Boni, A Ramalli IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control , 2025 2025 Citations: 3
Ultrasound guided blood brain barrier opening using a diagnostic probe in a whole brain model M Gionso, E Herlin, L Uva, F Guidi, P Tortoli, G Durando, L Raspagliesi, ... Scientific Reports 15 (1), 10674 , 2025 2025 Citations: 3
Fabrication and characterization of low-size and compact AlN PMUT arrays for advanced ultrasonic applications R De Fazio, VM Mastronardi, P Candida, A Qualtieri, F Rizzi, E Boni, ... IEEE Sensors Journal , 2025 2025 Citations: 4
On the impact of microbeamformers in 3-D high frame rate ultrasound imaging: A simulation study L Castrignano, P Tortoli, G Matrone, M Crocco, AS Savoia, A Ramalli IEEE Transactions on Biomedical Engineering 72 (6), 1941-1950 , 2025 2025 Citations: 6
Computationally efficient SVD filtering for ultrasound flow imaging and real-time application to ultrafast Doppler B Pialot, F Guidi, G Bonciani, F Varray, T Loupas, P Tortoli, A Ramalli IEEE Transactions on Biomedical Engineering 72 (3), 921-929 , 2024 2024 Citations: 8
A heterogeneous ultrasound open scanner for the real-time implementation of computationally demanding imaging methods G Bonciani, F Guidi, P Tortoli, C Giangrossi, A Dallai, E Boni, A Ramalli IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 72 … , 2024 2024 Citations: 7
Hardware description language versus high-level synthesis for the FPGA implementation of ultrasound beamformers: a comparative analysis V Meacci, A Dallai, S Ricci, E Boni, P Tortoli, A Ramalli 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium … , 2024 2024 Citations: 1
Ultrasound system for real-time multi-probe applications with CMUTs D Mazierli, AS Savoia, C Giangrossi, E Boni, A Ramalli, MU Khan, ... 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium … , 2024 2024
Advanced 3-D Packaging for Integrated 2-D PMUT Arrays and Front-End Circuits AS Savoia, M La Mura, MMD Pir, E Boni, A Ramalli, P Tortoli, R Dutta, ... 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium … , 2024 2024 Citations: 3
3-D ultrasound imaging with microbeamformer-based FDMAS: A preliminary performance assessment L Castrignano, G Matrone, P Tortoli, A Ramalli 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium … , 2024 2024 Citations: 2
Real-time, high-frame-rate, vector Doppler ultrasound imaging by a hybrid open platform G Bonciani, A Ramalli, A Bernard, F Guidi, P Tortoli, E Boni, D Garcia, ... 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium … , 2024 2024 Citations: 4
MOST CITED SCHOLAR PUBLICATIONS
ULA-OP: An advanced open platform for ultrasound research P Tortoli, L Bassi, E Boni, A Dallai, F Guidi, S Ricci IEEE transactions on ultrasonics, ferroelectrics, and frequency control 56 … , 2009 2009 Citations: 290
ULA-OP 256: A 256-channel open scanner for development and real-time implementation of new ultrasound methods E Boni, L Bassi, A Dallai, F Guidi, V Meacci, A Ramalli, S Ricci, P Tortoli IEEE transactions on ultrasonics, ferroelectrics, and frequency control 63 … , 2016 2016 Citations: 203
Ultrasound open platforms for next-generation imaging technique development E Boni, CH Alfred, S Freear, JA Jensen, P Tortoli IEEE transactions on ultrasonics, ferroelectrics, and frequency control 65 … , 2018 2018 Citations: 191
Density-tapered spiral arrays for ultrasound 3-D imaging A Ramalli, E Boni, AS Savoia, P Tortoli IEEE Transactions on ultrasonics, ferroelectrics, and frequency control 62 … , 2015 2015 Citations: 177
Design of optimal 2-D nongrid sparse arrays for medical ultrasound B Diarra, M Robini, P Tortoli, C Cachard, H Liebgott IEEE Transactions on Biomedical Engineering 60 (11), 3093-3102 , 2013 2013 Citations: 158
Multi-transmit beam forming for fast cardiac imaging—Experimental validation and in vivo application L Tong, A Ramalli, R Jasaityte, P Tortoli, J D'hooge IEEE transactions on medical imaging 33 (6), 1205-1219 , 2014 2014 Citations: 157
3-D super-resolution ultrasound imaging with a 2-D sparse array S Harput, K Christensen-Jeffries, A Ramalli, J Brown, J Zhu, G Zhang, ... IEEE transactions on ultrasonics, ferroelectrics, and frequency control 67 … , 2019 2019 Citations: 147
Doppler ultrasound technology for fetal heart rate monitoring: a review P Hamelmann, R Vullings, AF Kolen, JWM Bergmans, JOEH Van Laar, ... IEEE transactions on ultrasonics, ferroelectrics, and frequency control 67 … , 2019 2019 Citations: 140
A reconfigurable and programmable FPGA-based system for nonstandard ultrasound methods E Boni, L Bassi, A Dallai, F Guidi, A Ramalli, S Ricci, J Housden, P Tortoli IEEE transactions on ultrasonics, ferroelectrics, and frequency control 59 … , 2012 2012 Citations: 139
Experimental 3-D ultrasound imaging with 2-D sparse arrays using focused and diverging waves E Roux, F Varray, L Petrusca, C Cachard, P Tortoli, H Liebgott Scientific reports 8 (1), 9108 , 2018 2018 Citations: 132
High frame-rate, high resolution ultrasound imaging with multi-line transmission and filtered-delay multiply and sum beamforming G Matrone, A Ramalli, AS Savoia, P Tortoli, G Magenes IEEE transactions on medical imaging 36 (2), 478-486 , 2016 2016 Citations: 119
Bidirectional Doppler signal analysis based on a single RF sampling channel P Tortoli, L Bessi, F Guidi IEEE transactions on ultrasonics, ferroelectrics, and frequency control 41 … , 2002 2002 Citations: 112
Real-time vector velocity assessment through multigate Doppler and plane waves S Ricci, L Bassi, P Tortoli IEEE transactions on ultrasonics, ferroelectrics, and frequency control 61 … , 2014 2014 Citations: 109
Design, implementation, and medical applications of 2-D ultrasound sparse arrays A Ramalli, E Boni, E Roux, H Liebgott, P Tortoli IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 69 … , 2022 2022 Citations: 107
Architecture of an ultrasound system for continuous real-time high frame rate imaging E Boni, L Bassi, A Dallai, V Meacci, A Ramalli, M Scaringella, F Guidi, ... IEEE transactions on ultrasonics, ferroelectrics, and frequency control 64 … , 2017 2017 Citations: 102
2-D ultrasound sparse arrays multidepth radiation optimization using simulated annealing and spiral-array inspired energy functions E Roux, A Ramalli, P Tortoli, C Cachard, MC Robini, H Liebgott IEEE transactions on ultrasonics, ferroelectrics, and frequency control 63 … , 2016 2016 Citations: 102
Noninvasive simultaneous assessment of wall shear rate and wall distension in carotid arteries P Tortoli, T Morganti, G Bambi, C Palombo, KV Ramnarine Ultrasound in medicine & biology 32 (11), 1661-1670 , 2006 2006 Citations: 95
Comparison of carotid artery blood velocity measurements by vector and standard Doppler approaches P Tortoli, M Lenge, D Righi, G Ciuti, H Liebgott, S Ricci Ultrasound in medicine & biology 41 (5), 1354-1362 , 2015 2015 Citations: 88
Interaction between secondary velocities, flow pulsation and vessel morphology in the common carotid artery P Tortoli, V Michelassi, G Bambi, F Guidi, D Righi Ultrasound in medicine & biology 29 (3), 407-415 , 2003 2003 Citations: 84
Plane-wave transverse oscillation for high-frame-rate 2-D vector flow imaging M Lenge, A Ramalli, P Tortoli, C Cachard, H Liebgott IEEE transactions on ultrasonics, ferroelectrics, and frequency control 62 … , 2015 2015 Citations: 81
