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(a) A tubular object, such as a carbon fiber or blood vessel. Point B indicates the authentic signal of the cylindrical target’s edge; A and C are the artifacts of B, generated because of the signal blurring in AR-PAM. (b) Illustration of the relative magnitudes of PA signals between three points (A, B and C) after 1D- and 2D-SAFT are applied, respectively. (c) Synthesis of the correlated signals in both the x-z and y-z planes for the 2D-SAFT scheme.
