Table 1:

Data and ratios of apparent diffusion coefficient (ADC) values with 1-ROI and 3-ROI methods

Patient No. Age/Sex	Tumor Histology	ADC Tumor	ADC Tumor Average	Ratio 1-ROI method	Ratio 3-ROI method
1/14 y/M	JPA	1.45	1.44	2.02	1.93
2/7 y/M	JPA	1.28	1.24	1.76	1.65
3/20 mo/M	JPA	1.64	1.66	2.18	1.90
4/11 y/M	JPA	1.44	1.45	2.02	1.97
5/15 y/M	JPA	1.65	1.83	2.43	2.48
6/15 y/F	JPA	2.01	1.97	2.93	2.70
7/6 y/F	JPA	1.39	1.29	1.94	1.67
8/6 y/M	JPA	1.89	1.86	2.72	2.50
9/3 y/M	JPA	1.44	1.48	1.62	1.77
10/21 y/M	JPA	1.38	1.43	1.66	1.70
11/4 y/F	JPA	1.60	1.85	2.47	2.50
12/7 y/M	JPA	1.62	1.60	1.84	1.90
13/6 y/M	JPA	1.73	1.74	2.01	2.12
14/4 y/F	JPA	1.54	1.58	2.26	2.16
15/15 y/F	JPA	2.09	1.93	2.99	2.76
16/7 y/M	JPA	1.49	1.46	1.84	1.87
17/2 y/F	JPA	2.05	2.11	2.30	2.21
18/8 y/M	Ependymoma	1.08	0.97	1.28	1.15
19/16 y/M	Ependymoma	1.11	1.05	1.39	1.31
20/4 y/F	Ependymoma	1.24	1.15	1.39	1.44
21/5 y/F	Ependymoma	1.07	1.05	1.43	1.42
22/22 y/F	Ependymoma	1.29	1.26	1.85	1.63
23/16 y/M	Medulloblastoma	0.69	0.68	1.00	0.91
24/3 y/M	Medulloblastoma	0.90	0.93	1.07	1.10
25/22 y/F	Medulloblastoma	0.48	0.49	0.71	0.71
26/23 y/F	Medulloblastoma	0.54	0.48	0.71	0.66
27/7 y/F	Medulloblastoma	0.74	0.69	1.02	0.91
28/11 y/M	Medulloblastoma	0.61	0.57	0.77	0.74
29/2 y/F	Medulloblastoma	0.58	0.60	0.79	0.82
30/6 wk/M	Medulloblastoma	0.80	0.80	0.84	0.84
31/13 mo/F	AT/RT	0.60	0.63	0.69	0.74
32/15 mo/M	AT/RT	0.55	0.56	0.69	0.64

Note:—1-ROI method indicates the approach wherein a single region of interest of solid enhancing tumor to normal-appearing cerebellum was performed; 3-ROI method, approach used by placing additional regions of interest in the tumor and bilateral centrum semiovale.
ADC values are expressed in 10⁻³ mm²/s. JPA indicates juvenile pilocytic astrocytoma; AT/RT, atypical teratoid/rhabdoid tumor.