Non-linear Ultrasonic Computed Tomography (USCT) for soft and hard tissue imaging

P. Lasaygues (1) , J. Rouyer (2) , S. Mensah (1) , E Franceschini (3) , G Rabau (3) , R Guillermin (3) , Samuel Bernard (3) , V. Monteiller (4) , Dimitri Komatitsch (3)

1 O&I - Ondes et Imagerie
2 LMIA - Laboratoire de Mathématiques Informatique et Applications [UHA]
3 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
4 GET - Géosciences Environnement Toulouse

Ultrasonic Computed Tomography (USCT) is an imaging technique that has proven effective for soft-tissue characterization. The classical tomography procedures are adapted to broadband data acquired in scattering configurations under Born approximation for homogeneous media and far-field conditions, while the heterogeneous objects are probed by spherical waves in near-field conditions. An elliptical Fourier transform theory is then derived to solve the near-field inverse problem in case of harmonic ellipsoidal waves. More recently, the use of USCT has been envisaged for bone imaging. In this field, the large variations of impedance distribution (high impedance contrast) require that the modelling of wave propagation be integrated into the reconstruction scheme. In that case, iterative inversion schemes are proposed. These various reconstruction procedures are validated against experiments and numerical simulations .

Mots clés: Bones; Breast; Ultrasonic Computed Tomography; Inverse Born Approximation; Iterative Ap- proximation; Full Waveform Imaging

Domaines: Acoustique [physics.class-ph]; Imagerie; Ingénierie biomédicale

P. Lasaygues, J. Rouyer, S. Mensah, E Franceschini, G Rabau, et al.. Non-linear Ultrasonic Computed Tomography (USCT) for soft and hard tissue imaging. International Workshop on Medical Ultrasound Tomography, Nov 2017, Speyer, Germany. ⟨hal-01769814⟩