Time of flight interpolated synthetic aperture focusing technique

N. V. Ruiter; E. Kretzek; M. Zapf; T. Hopp; H. Gemmeke

doi:10.1117/12.2254259

13 March 2017 Time of flight interpolated synthetic aperture focusing technique

N. V. Ruiter, E. Kretzek, M. Zapf, T. Hopp, H. Gemmeke

Author Affiliations +

Proceedings Volume 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography; 101390Q (2017) https://doi.org/10.1117/12.2254259
Event: SPIE Medical Imaging, 2017, Orlando, Florida, United States

Abstract

Synthetic Aperture Focusing Technique (SAFT) allows fast data acquisition and optimally focused images. The computational burden for 3D imaging is large as for each voxel the delay for each acquired A-scan has to be calculated, e.g. O(N⁵) for N³ voxels and N² A-scans. For 3D reconstruction of objects which are large in terms of the wavelength, e.g. ≥ (100 λ)³, the computation of one volume takes several days on a current multicore PC. If the 3D distribution of the speed of sound is applied to correct the delays, the computation time increases further. In this work a time of flight interpolation based GPU implementation (TOFI-SAFT) is presented which accelerates our previous GPU implementation of speed of sound corrected SAFT by a factor of 7 to 16 min. with only minor reduction of image quality.

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Citation Download Citation

N. V. Ruiter, E. Kretzek, M. Zapf, T. Hopp, and H. Gemmeke "Time of flight interpolated synthetic aperture focusing technique", Proc. SPIE 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography, 101390Q (13 March 2017); https://doi.org/10.1117/12.2254259

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