13 March 2017 Time of flight interpolated synthetic aperture focusing technique
Author Affiliations +
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.
Conference Presentation
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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); doi: 10.1117/12.2254259; https://doi.org/10.1117/12.2254259

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