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Table 2: Results of FPD CT angiographic image and MRA evaluation
Patient No. Occlusion Site Image Quality Collateral Score Visualization Score
FPD CT MRA
1 ICA-T Excellent 1 3 3
2 ICA-T Excellent 3 2 5
3 ICA-T Poor – – –
4 ICA-T Excellent 1 3 5
5 ICA-T Excellent 1 2 –
6 ICA-T Fair – – 5
7 ICA-T Excellent 0 5 5
8 M1 proximal Excellent 3 1 5
9 M1 proximal Excellent 2 1 5
10 M1 proximal Excellent 2 1 5
11 M1 proximal Excellent 2 1 4
12 M1 distal Excellent 3 1 5
13 M1 distal Good 2 1 3
14 M2 proximal Excellent 3 1 4
15 M2 proximal Good 1 1 2
16 M2 proximal Excellent 2 1 5
17 M2 proximal Excellent 2 1 5
18 M2 proximal Excellent 2 1 5
19 M2 proximal Good 2 1 5
20 M2 distal Excellent 3 1 5
21 cICA, M2 proximal Good 3 1 5
22 cICA, M2 proximal Good 1 2 5
Note:— – indicates unevaluable.

Patient No.	Occlusion Site	Image Quality	Collateral Score	Visualization Score
Patient No.	Occlusion Site	Image Quality	Collateral Score	FPD CT	MRA
1	ICA-T	Excellent	1	3	3
2	ICA-T	Excellent	3	2	5
3	ICA-T	Poor	–	–	–
4	ICA-T	Excellent	1	3	5
5	ICA-T	Excellent	1	2	–
6	ICA-T	Fair	–	–	5
7	ICA-T	Excellent	0	5	5
8	M1 proximal	Excellent	3	1	5
9	M1 proximal	Excellent	2	1	5
10	M1 proximal	Excellent	2	1	5
11	M1 proximal	Excellent	2	1	4
12	M1 distal	Excellent	3	1	5
13	M1 distal	Good	2	1	3
14	M2 proximal	Excellent	3	1	4
15	M2 proximal	Good	1	1	2
16	M2 proximal	Excellent	2	1	5
17	M2 proximal	Excellent	2	1	5
18	M2 proximal	Excellent	2	1	5
19	M2 proximal	Good	2	1	5
20	M2 distal	Excellent	3	1	5
21	cICA, M2 proximal	Good	3	1	5
22	cICA, M2 proximal	Good	1	2	5