Associations between ¹⁸F-FDG-PET, DWI, and DCE Parameters in Patients with Head and Neck Squamous Cell Carcinoma Depend on Tumor Grading

Table 7

(a) Comparison of PET and DWI values between different tumor T stages

Parameters	T1/2 (mean ± SD)	T3/4 (mean ± SD)	Mann–Whitney
			( values)
	14.98 ± 7.88	20.25 ± 9.34	0.19
	6.46 ± 1.60	8.73 ± 3.83	0.17
× 10^−3 mm^2s^−1	0.64 ± 0.23	0.73 ± 0.23	0.41
× 10^−3 mm^2s^−1	1.09 ± 0.17	1.16 ± 0.21	0.56
× 10^−3 mm^2s^−1	1.73 ± 0.33	1.78 ± 0.30	0.58
	0.17 ± 0.13	0.21 ± 0.11	0.27
	1.05 ± 1.25	0.42 ± 0.17	0.37
	0.41 ± 0.22	0.55 ± 0.15	0.25

(b) Comparison of PET and DWI values between different tumor N stages

Parameters	N 0/1 (mean ± SD)	N 2 (mean ± SD)	Mann–Whitney
			( values)
	19.72 ± 7.99	18.75 ± 9.72	0.78
	8.50 ± 3.88	8.08 ± 3.50	0.97
× 10^−3 mm^2s^−1	0.78 ± 0.24	0.69 ± 023	0.75
× 10^−3 mm^2s^−1	1.18 ± 0.24	1.13 ± 0.20	0.64
× 10^−3 mm^2s^−1	1.78 ± 0.29	1.77 ± 0.31	0.88
	0.16 ± 0.08	0.22 ± 0.13	0.25
	0.32 ± 0.11	0.68 ± 0.79	0.0477
	0.52 ± 0.18	0.50 ± 0.18	0.88

(c) Comparison of PET and DWI values between different tumor M stages

Parameters	M0 (mean ± SD)	M1 (mean ± SD)	Mann–Whitney
			( values)
	18.98 ± 9.14	16.49 ± 10.06	0.56
	8.01 ± 3.40	6.87 ± 1.50	0.60
	0.68 ± 0.22	0.89 ± 0.28	0.21
	1.12 ± 0.19	1.28 ± 0.30	0.33
	1.76 ± 0.30	1.89 ± 0.37	0.46
	0.21 ± 0.12	0.14 ± 0.08	0.47
	0.62 ± 0.72	0.28 ± 0.17	0.16
	0.50 ± 0.19	0.55 ± 0.10	0.78