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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: Photoacoustics. 2014 Mar 1;2(1):21–32. doi: 10.1016/j.pacs.2013.11.001

Figure 5.

Figure 5

In an extremely compact imaging system, the far-field-based algorithm still exhibited a better resolution than the point-like-transducer-based algorithm did. However, it suffers from severe patterned artifacts (near-field artifacts). The patch-based algorithm (m = 2) mitigated the artifacts. (a) The original phantom in the z = 0 plane. The reconstruction results for (b) the point-like transducer approximation, (c) the far-field approximation, and (d) the patch approximation (m = 2), respectively.