CNN-based multi-modal radiomics analysis of pseudo-CT utilization in MRI-only brain stereotactic radiotherapy: a feasibility study

Table 3 Mean values of TCP/NTCP of OARs and PTV

TCP/NTCP (Mean, range)	Initial (34)	T1W	T1W-CE	Absolute Deviation (T1W)	Absolute Deviation (T1W-CE)
PTV	99.58% (99.19–99.87%)	99.59% (99.18–99.87%)	99.60% (99.18–99.87%)	0.03% (0.00-0.22%)	0.03% (0.00-0.22%)
Lens	0.13‰ (0.11–0.24‰)	0.13‰ (0.11–0.26‰)	0.13‰ (0.11–0.24‰)	0.00‰ (-0.03-0.01‰)	0.00‰ (-0.01-0.01‰)
Opt_Chiasm	2.36‰ (2.14–4.67‰)	2.35‰ (2.14–4.58‰)	2.34‰ (2.14–4.59‰)	0.00‰ (-0.07-0.17‰)	0.00‰ (-0.08-0.08‰)
Opt_Nerve	2.23‰ (2.14–2.85‰)	2.23‰ (2.14–2.88‰)	2.22‰ (2.14–2.88‰)	0.00‰ (-0.04-0.03‰)	0.00‰ (-0.04-0.01‰)
Brainstem (33)	0.02‰ (0.00-0.65‰)	0.02‰ (0.00-0.56‰)	0.02‰ (0.00-0.57‰)	0.00‰ (0.00-0.09‰)	0.00‰ (0.00-0.08‰)
Brainstem (PTV)	96.87%	97.36%	97.37%	-0.48%	-0.50%
Brain-GTV	10.06‰ (0.00-49.74‰)	9.12‰ (0.00-46.04‰)	10.12‰ (0.00-44.95‰)	0.94‰ (-4.14-18.12‰)	1.18‰ (-4.14-16.33‰)

Note: TCP and NTCP values are expressed as mean values, with a range of values in parentheses; and 0.00‰ in the table is not 0, but represent the value is less than \( 1{\times 10}^{-6}\). Brainstem (33) = brainstem in 33 patients (PTV outside the brainstem); Brainstem (PTV) = brainstem (the only case of PTV in the brainstem); Opt_Chiasm = optic chiasm; Opt_Nerve = optic nerve; Brain-GTV = normal brain

ISSN: 1471-2407