Table 3.

Preservation of patient gross tumor volume (GTV) characters in T2w TR-4DMRI using two reconstruction methods, T2wA: T2^HR→[T1^BH→FB] and T2wB: [T2^HR←T1^BH]→FB, together with T1w TR-4DMRI. Results at the two extreme respiratory states are shown, full exhalation (Ex) and full inhalation (In), carrying the upper limit of uncertainty. The GTV in T2w high-resolution (HR) or T1w breath-hold (BH) images are used as the reference.

Patient	State	ΔCOM (mm)			%V				Dice Index
		(Ref to T1 FB)			(Ref to T1-BH)		(Ref to T2-HR)		(Ref to T2-HR)
		T1w	T2wA	T2wB	T1w	T2wA	T2wA	T2wB	T2wA	T2wB
1	Ex	2.4	2.5	3.2	1.01	1.06	0.90	1.03	0.85	0.87
	In	3.1	2.7	3.1	1.02	1.12	0.95	1.00	0.83	0.90
2	Ex	3.5	3.2	2.1	1.03	1.01	0.75	0.97	0.83	0.86
	In	3.9	3.9	3.7	1.03	1.04	0.77	0.94	0.81	0.84
3	Ex	4.0	2.1	2.6	1.07	1.07	0.47	0.95	0.62	0.87
	In	3.1	2.3	2.3	1.10	1.13	0.50	1.00	0.64	0.85
4	Ex	3.1	3.8	3.0	0.99	1.03	0.78	1.02	0.80	0.79
	In	3.3	1.6	2.3	0.96	1.06	0.80	0.99	0.78	0.80
5	Ex	3.3	1.0	3.8	1.00	1.01	0.89	1.01	0.68	0.71
	In	0.6	3.6	3.2	1.00	1.05	0.92	0.98	0.63	0.74
6	Ex	2.0	1.7	2.3	1.03	1.10	0.84	1.04	0.69	0.80
	In	3.2	3.4	3.1	1.01	1.10	0.84	1.00	0.65	0.72
Mean		3.0	2.7	2.9	1.02	1.06	0.78	0.99	0.73	0.81
St Dev		0.9	0.9	0.6	0.04	0.04	0.15	0.03	0.09	0.06