Fig. 2.

(a) Selected 690-nm iPAS $z$-slices showing a graphite/agar gel phantom reconstructed using spatial domain stitching, resulting in unwanted scan grid artifacts in the final composite image. (b) The same scan data but with stitching implemented in the gradient domain, resulting in complete or near complete elimination of the grid artifacts. The larger images in (c) and (d) allow for an easier appreciation of the result, while the photograph in (e) provides an effective gold standard reference.