Stochastic ray tracing for simulation of high intensity focal ultrasound therapy

Julius Koskela, Erkki Vahala, Martijn De Greef, Luc P. Lafitte, Mario Ries

Onderzoeksoutput: Bijdrage aan tijdschriftArtikelpeer review

13 Citaten (Scopus)

Samenvatting

An algorithm is presented for rapid simulation of high-intensity focused ultrasound (HIFU) fields. Essentially, the method combines ray tracing with Monte Carlo integration to evaluate the Rayleigh-Sommerfeld integral. A large number of computational particles, phonons, are distributed among the elements of a phase-array transducer. The phonons are emitted into random directions and are propagated along trajectories computed with the ray tracing method. As the simulation progresses, an improving stochastic estimate of the acoustic field is obtained. The method can adapt to complicated geometries, and it is well suited to parallelization. The method is verified against reference simulations and pressure measurements from an ex vivo porcine thoracic tissue sample. Results are presented for acceleration with graphics processing units (GPUs). The method is expected to serve in applications, where flexibility and rapid computation time are crucial, in particular clinical HIFU treatment planning.

Originele taal-2Engels
Pagina's (van-tot)1430-1440
Aantal pagina's11
TijdschriftJournal of the Acoustical Society of America
Volume136
Nummer van het tijdschrift3
DOI's
StatusGepubliceerd - 1 sep. 2014
Extern gepubliceerdJa

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