Table 2: Summary of average pixel intensities and contrast enhancement values.

SampleAverage pixel intensityContrast enhancement (dB)

Water without NPs1.30
B-GNPs in water41.9115.07
Diluted B-GNPs in water10.819.19
Nanospheres in water9.728.72
Nanorods in water1.510.65
Gel with TiO2 with B-GNPs0.913.17
Gel with TiO2 without B-GNPs0.44