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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: IEEE Trans Med Imaging. 2016 Feb 3;35(7):1676–1685. doi: 10.1109/TMI.2016.2524992

Fig. 4.

Fig. 4

Improvements in PSF with swept synthetic aperture are demonstrated even in the presence of aberration. (a) Enevelope-detected PSF and k-space representation for the control (fluid path) experiment for a single aperture position and the swept aperture. The k-space representation shows an extended lateral region of support in the swept aperture case. (b) Envelope-detected PSF and k-space representation for the tissue/fluid path experiment for a single aperture position and the swept aperture. Due to technical malfunction the data set is missing transmit events 31–38 (out of 101), so the corresponding events were removed from (a) as well. Higher side lobes corresponding to the region of destructive interference in k-space are visible compared to the control case. (c) Lateral slice from PSF for each case taken at a depth of 71 mm. (d) Cystic resolution for a range of radii for all four PSFs.