Table 3.

Hounsfield values for different substances.

Substance		Hounsfield Units
Air		−1000
Water		0
Bone	Cancellous	+300 to +400 [37]
	Cortical	+500 to +1900 [37,38,39]
	Anterior maxilla	+600 to +700 [34,40]
	Posterior maxilla	+300 to +400 [34,40]
	Anterior mandible	+800 to +1100 [34,40]
	Posterior mandible	+500 to +600 [34,40]