Fig. 4

Variation of attenuation coefficient of a 2% w/w agar a) 25% v/v evaporated milk gel with different silica concentrations for fabricating the brain phantom. b 1.2% w/v silica gel with different evaporated milk concentrations for fabricating the brain phantom, c). 40% v/v of evaporated milk with different silica concentrations for fabricating the muscle phantom, d) 2.1% w/v silica with different evaporated milk concentrations for fabricating the muscle phantom