Irene Pi-Martín, PhD candidate at the Ultrasound Medical and Industrial Laboratory (UMIL), has been awarded with the “Luis de Camoens” award, sponsored by the “Luis de Camoens” Chair of the University Carlos III of Madrid -Banco de Santander and Ramón Areces Foundation-, the Prize for the best paper by a young researcher on applications of acoustic science and technology among the papers presented at the 52nd Spanish Congress of Acoustics -TECNIACUSTICA 2021, celebrated online last 24-27 October 2021.
Irene Pi-Martín has been awarded for her work Performance evaluation of image reconstruction algorithms for photoacoustic tomography, where she explores the use of several reconstruction methods to conform photoacoustic tomographic images.
The research was carried out under the supervision of Alejandro Cebrecos and Juan José García-Garrigos, Noé Jiménez and Francisco Camarena, at I3M, as a part of the research activities of the EARMAP Project (PID2019-111436RB-C22), funded by the Spanish Ministry of Science, Innovation and Universities “Proyectos Nacionales Retos i+d”.
Photoacoustic (PA) imaging uses the acoustic energy produced by some materials when heated with a laser due to the photoacoustic effect. Photoacoustic tomography (PAT) can be a powerful tool in medical imaging, since it combines the optical contrast with the high penetration of ultrasound to generate anatomical, molecular and functional images. To create the images, beamforming algorithms are used as commonly in ultrasonic imaging. The most used algorithm is Delay-and-Sum (DAS) beamforming because is computationally efficient and very easy to implement, however, it has some limitations as it offers low image resolution and contrast. To overcome these image quality problems, improvements have emerged over the typical DAS to obtain better image quality and narrower main lobes. They are based on combining the signals of the different elements, windowing the signal, or even calculating the optimal apodization for each pixel based on the signals received by the ultrasonic elements. This work is a numerical and experimental study that uses the spatial resolution and the signal to noise ratio to evaluate the performance of the main reconstruction algorithms used in PAT.
You can read the paper here.
Performance evaluation of image reconstruction algorithms for photoacoustic tomography
I Pi-Martín, JJ García-Garrigos, A Cebrecos, N Jiménez, F Camarena
EuroNoise 2021: European Congress and Exposition on Noise Control Engineering. Madeira, Portugal. 24-27 October 2021. Conference proceedings, pp. 901-910, Sociedade Portuguesa de Acústica, ISBN: 978-989-53387-0-2