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(Color online) System performance test of the integrated OR/AR-PAM system. (a) OR-PAM image of a resolution test target and (b) its close-up. (c) Lateral line spread function (LSF) of the AR-PAM. (d) Axial LSF (red) and its envelope (blue dashed). (e) CNR vs. shift. (f) In vivo OR- and (g) AR-PAM images of a black needle and blood vessels (marked by arrows) in a mouse leg. CNR: contrast-to-noise ratio; NPA: normalized photoacoustic amplitude.
