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Novel imaging US methods

The activity of the MSDLab in the field of ultrasound imaging is strictly related to the recent development of the ULA-OP system. The full programmability of the transmission-reception of ULA-OP allows the production of non-standard ultrasound fields, such as the limited diffraction beams (see the figure with a Bessel beam example). 
The interleave of arbitrary sequences of transmission and reception allows performing a large class of non-conventional imaging methods, such as high frame rate imaging based on the Fourier domain.

See also:
  • L. Tong, A. Ramalli, R. Jasaityte, P. Tortoli and J. D'hooge (2014). Multi-Transmit Beam Forming for Fast Cardiac Imaging - Experimental Demonstration and In-Vivo Application, IEEE Trans. on Medical Imaging, Vol. 33, N. 6, pp. 1205-1219 (
  • M. Toulemonde, O. Basset, P. Tortoli, C. Cachard (2015). Thomson's multitaper approach combined with coherent plane-wave compounding to reduce speckle in ultrasound imaging, Ultrasonics, Vol. 56, pp. 390-398 (DOI:
  • M.Lenge, A.Ramalli, E.Boni, H.Liebgott, C. Cachard, P.Tortoli (2014). High-frame-rate 2-D vector blood flow imaging in the frequency domain, IEEE Trans. Ultrason., Ferroelect., Freq. Contr, Vol. 61, N. 9, pp. 1504-1514. (DOI:
  • B. Diarra, M. Robini, P. Tortoli, C. Cachard, H. Liebgott. Design of optimal 2-D non-grid sparse arrays for medical ultrasound. IEEE Trans.Biomed Eng. Vol.60, no.11, pp.3093-3102, November 2013 (DOI:
  • L. Demi, J. Viti, L. Kusters, F. Guidi, P. Tortoli, M. Mischi. Implementation of Parallel Transmit Beamforming Using Orthogonal Frequency Division Multiplexing Achievable Resolution and Interbeam Interference, IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vol. 60, no. 11, November 2013, pp.2310-2320. (
  • F.Varray, O. Basset, P. Tortoli, C. Cachard. CREANUIS: A Nonlinear Radio Frequency Ultrasound Image Simulator, Ultrasound in Med. & Biol., Vol. 39, No. 10, pp. 1915-1924, 2013. ( 
  • E. Boni, L. Bassi, A. Dallai, F. Guidi, A. Ramalli, S. Ricci, R. Housden, and P. Tortoli, A Reconfigurable and Programmable FPGA based System for non-standard Ultrasound Methods, IEEE Trans. on Ultrason. Ferroel and Freq. Control, 59:7, pp.1378-1385, 2012.
  • A.Ramalli, O.Basset, C.Cachard, E.Boni, P.Tortoli. Frequency domain-based strain estimation and high frame-rate imaging for quasi-static elastography. IEEE Trans. on Ultrason. Ferroel and Freq. Control (ISSN:0885-3010), 59, pp.817-824, 2012.A. Ramalli, F. Guidi, E. Boni, P. Tortoli. Real-time base-band pulse compression imaging. IEEE 2013 International Ultrasonics Symposium Proceedings, p.2002-2005, DOI: 10.1109/ULTSYM.2013.0511, Praga, July 2013.
  • M. Toulemonde, O. Basset, C. Cachard, P. Tortoli. Thomson's multitaper high frame rate compounding for speckle reduction. IEEE 2013 International Ultrasonics Symposium Proceedings, p.1452-1455, DOI: 10.1109/ULTSYM.2013.0368, Praga, July 2013.
  • A. Iula, G. E. Hine, A. Ramalli, F. Guidi, E. Boni. An enhanced Ultrasound technique for 3D Palmprint Recognition. IEEE 2013 International Ultrasonics Symposium Proceedings, p.978-981, DOI: 10.1109/ULTSYM.2013.0251, Praga, July 2013.
  • Boni, E. ; Cellai, A. ; Ramalli, A. ; Tortoli, P. A high performance board for acquisition of 64-channel ultrasound RF data. 2012 IEEE Ultrasonics Symposium Proceedings, Dresda, Ottobre 2012, DOI: 10.1109/ULTSYM.2012.0517 , pp.2067-2071.


Simulated (top left) and measured (top right) one-way beamplots obtained for unsteered Bessel beam. Local peak-to-peak-pressures (PPPs) were coded according to the look-up-table on the right. Bottom panels: simulated (continuous lines) and measured (dotted lines) PPPs along the Z axis (left) and X axis at 20 mm depth (right)
ultimo aggiornamento: 25-Set-2020
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