Fig. 6.

Controlling the concentration of tissue-mimicking phantom components enables direct, independent tuning of absorption and scattering for single wavelength PAT device testing. (a) Black India ink and (b) Intralipid-20% fat emulsion dilutions are shown that were used to determine μ_a and μ_s’ respectively. The background for the ink dilutions is white, while the fat emulsion dilutions’ background is white with curved black lines. (c) The calculated μ_a from the black India ink’s corrected transmission data is plotted over concentration with a linear-fitted curve. (d) Similarly, a linear curve was fitted of Intralipid-20% fat emulsion’s μ_s’ over concentration. For comparison the linear fit of Intralipid-10% fat emulsion’s μ_s’ over concentration from Royston, Poston, and Prahl is plotted. (e) Top-down view of the phantom mold with capillary tube and pencil lead targets epoxied into place. (f) Front view of phantom mold with prostate tissue-mimicking mixture added. BII: black India ink; LF: linear fit curve; IL-20%: Intralipid-20%; IL-10%: Intralipid-10%; CT: capillary tube; PL: pencil lead; PPM: prostate phantom mixture.