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Table 2 Comparison of the densities for the materials utilised for the phantom designing with real human tissues [41,42,43,44,45,46,47]

From: Design and implementation of a prototype head and neck phantom for the performance evaluation of gamma imaging systems

Materials Density (g/cm3) Mass attenuation coefficient (cm2/g) Calculated Hounsfield unit (HU)
Water 1 0.154 0
Thyroid gland 0.98
ABS thermoplastic polymer 1.06–1.08 0.152 46–66
Bone tissues 1.7–2.0 0.156 722–1026
Aluminium 2.69 0.137 1393
Soft tissues 1.04 0.153 33
PMMA 1.18 0.149 142
Trachea 0.98–1.1