CINECA IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishIn this paper, we propose a method to improve the lateral resolution and the contrast of ultrasound images, based on the cancellation of the sole contribution due to the sidelobes, thus maintaining the original depth of field and penetration capability. In the proposed method, each scan line is obtained by compounding the signals reconstructed by two emissions. For the first one, typical aperture and apodization profile are adopted. In the second emission, the same aperture is used, but the sign of the apodization profile is inverted over the second half of the aperture. The same approach is applied in receive. In this way, the second two-way beam has a main lobe with near-zero amplitude and sidelobes close to those of the first beam. The RF echo-signals corresponding to the two emissions are demodulated and successively subtracted. The resulting signal is finally log-compressed and scan converted. Simulations and in vivo experiments show a significant improvement of both detail and contrast resolution.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Improved lateral resolution and contrast in ultrasound imaging using a sidelobe masking technique |
| Autori: | |
| Data di pubblicazione: | 2014 |
| Serie: | |
| Abstract: | In this paper, we propose a method to improve the lateral resolution and the contrast of ultrasound images, based on the cancellation of the sole contribution due to the sidelobes, thus maintaining the original depth of field and penetration capability. In the proposed method, each scan line is obtained by compounding the signals reconstructed by two emissions. For the first one, typical aperture and apodization profile are adopted. In the second emission, the same aperture is used, but the sign of the apodization profile is inverted over the second half of the aperture. The same approach is applied in receive. In this way, the second two-way beam has a main lobe with near-zero amplitude and sidelobes close to those of the first beam. The RF echo-signals corresponding to the two emissions are demodulated and successively subtracted. The resulting signal is finally log-compressed and scan converted. Simulations and in vivo experiments show a significant improvement of both detail and contrast resolution. |
| Handle: | http://hdl.handle.net/11571/1125242 |
| ISBN: | 9781479970490 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
http://hdl.handle.net/11571/1125242
Copyright © 2021