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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

–

–