To improve quality of focused ultrasound images, the non-linear Filtered-Delay Multiply And Sum (F-DMAS) beamformer (DOI: 10.1109/TMI.2014.2371235) was recently proposed as an alternative to the common Delay And Sum (DAS). Given the higher computational cost as compared to DAS, in this paper we propose a simplified version of F-DMAS, which consists in applying DAS to the square root of the RF signals, followed by squaring and band-pass filtering. The lowered computational cost allows the use of the proposed beamformer in high frame-rate imaging, such as ultrafast imaging, or in 3D imaging. Besides, we generalize the method to the pthroot case, referred to as F-DAS1/p.
Polichetti, M., Varray, F., Matrone, G., Savoia, A.S., Bera, J., Cachard, C., et al. (2017). A computationally efficient non-linear beamformer based on pthroot signal compression for enhanced ultrasound B-mode imaging. In IEEE International Ultrasonics Symposium, IUS (pp.1-1). IEEE Computer Society [10.1109/ULTSYM.2017.8091870].
A computationally efficient non-linear beamformer based on pthroot signal compression for enhanced ultrasound B-mode imaging
Savoia, Alessandro Stuart;
2017
Abstract
To improve quality of focused ultrasound images, the non-linear Filtered-Delay Multiply And Sum (F-DMAS) beamformer (DOI: 10.1109/TMI.2014.2371235) was recently proposed as an alternative to the common Delay And Sum (DAS). Given the higher computational cost as compared to DAS, in this paper we propose a simplified version of F-DMAS, which consists in applying DAS to the square root of the RF signals, followed by squaring and band-pass filtering. The lowered computational cost allows the use of the proposed beamformer in high frame-rate imaging, such as ultrafast imaging, or in 3D imaging. Besides, we generalize the method to the pthroot case, referred to as F-DAS1/p.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
