Table 4 Mean errors of p CT and estimated mean deviations of WET for different tissue types

From: MRI-based treatment plan simulation and adaptation for ion radiotherapy using a classification-based approach

Tissue	Mean error of	Δ WET_1cm	Δ WET_5cm	Δ WET_10cm
	p CT [HU]	[mm]	[mm]	[mm]
air	43.3	0.4 ± 0.3	1.8 ± 0.6	3.6 ± 0.9
“partial volume”	28.6	0.3 ± 0.7	1.4 ± 1.5	2.9 ± 2.1
soft tissue	-1.4	-0.02 ± 0.3	-0.1 ± 0.6	-0.2 ± 0.9
soft bone	-63.2	-0.4 ± 0.3	-1.8 ± 0.6	-3.7 ± 0.9
bone	-223.1	-1.2 ± 0.4	-6.0 ± 0.8	-11.9 ± 1.1

The best combination of contrasts and additional features was used for calculations.

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