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Fig. 5 | BMC Biomedical Engineering

Fig. 5

From: A handheld device for intra-cavity and ex vivo fluorescence imaging of breast conserving surgery margins with 5-aminolevulinic acid

Fig. 5

Eagle device FL illumination uniformity. a-b Relative optical power measured at nine evenly-spaced \(1\times 1\,\text {cm}\) locations within the FOV from 3 and 10 cm imaging distances. Percentages are relative to the maximum optical powers measured: \({71.1}\frac{\text {mW}}{\textrm{cm}^{2}}\) from 3 cm and \({9.5}\frac{\text {mW}}{\textrm{cm}^{2}}\) from 10 cm. c-f Eagle FL device illumination uniformity measured by imaging a wide dish of liquid PpIX from 3 cm (c and e) and 10 cm (d and f). Images (c) and (d) were captured of the PpIX dish. Reflections from the LEDs are visible near the centres of the FOV. Intensity contours were calculated from these images in steps of \(10\%\) relative to the maximum intensity, shown in panels (e) and (f). Crosshairs denoting the centre of each FOV axis were overlaid to observe the offset of the illumination from the centre. The “notch” in the lower right corner of the \(100\%\) contour in panel (e) is likely due to movement of the PpIX liquid during image capture

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BMC Biomedical Engineering

ISSN: 2524-4426

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