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. 2019 Nov 8;19(22):4861. doi: 10.3390/s19224861

Figure 3.

Figure 3

Comparing the structural imaging capabilities of the LED-based PACT and PAUS systems using a pencil lead phantom. (a) Schematic showing side view of a tissue-mimicking intralipid phantom with four targets embedded. The depth of targets from the top surface of the phantom are as follows: target-1 (bundle of five 0.3 mm pencil leads, at 10 mm), target-2 (0.3 mm pencil lead, at 14 mm), target-3 (0.3 mm pencil lead, at 23 mm), and target-4 (0.3 mm pencil lead, at 31 mm). (b,c) Photographs of the side and top views of the phantom. Reconstructed 3-D volume-rendered photoacoustic image (d) using PACT, and (e) linear scanning of the conventional PAUS systems. Photoacoustic amplitude plots of the pencil lead target-3, located at 23 mm depth inside the medium, along the lateral, axial, and elevational directions of the volume-rendered (f–h) PACT image shown in (d), and (i–k) the linear scan image shown in (e).