Table 2. MRI findings for 60 patients before and after treatment by IAC.

MRI features	Before IAC	After IAC	P value
Location
Tumor with totally or partially covering the optic disk	45	3
Tumor with distance of the tumor to the optic disk less than 2 mm	11	14	< 0.01
Tumor with distance of the tumor to the optic disk more than 2 mm	4	43
Maximum diameter of tumor (mean values, cm)	1.55 ± 0.26	0.66 ± 0.36	< 0.001
D (n = 50)	1.54 ± 0.24	0.61 ± 0.35	< 0.001
E (n = 10)	1.60 ± 0.36	0.87 ± 0.38	< 0.001
Thickness (mean values, cm)	1.41 ± 0.34	0.39 ± 0.34	< 0.001
D (n = 50)	1.42 ± 0.34	0.34 ± 0.30	< 0.001
E (n = 10)	1.36 ± 0.35	0.61 ± 0.45	< 0.001
Maximum cross-sectional area (mean values, cm2)	1.51 ± 0.45	0.29 ± 0.23	< 0.001
D (n = 50)	1.49 ± 0.44	0.24 ± 0.20	< 0.001
E (n = 10)	1.65 ± 0.50	0.53 ± 0.26	< 0.001
ADC (mean values, 10−3 mm2/s)	0.94 ± 0.24	2.24 ± 0.40	< 0.001
D (n = 50)	0.92 ± 0.22	2.24 ± 0.43	< 0.001
E (n = 10)	1.00 ± 0.33	2.22 ± 0.27	< 0.001
Enhancement
Non-enhancement	0	55
Mild	9	5	< 0.001
Moderate	51	0
Enhancement of laminar optic nerve, No. (%)	6 (10)	0 (0)	< 0.001

IAC = intra-arterial chemotherapy.

ADC = apparent diffusion coefficient.

All the count data in the table are patient numbers.